daniel majela
2013-10-10 17:47:31 UTC
Em 09/10/2013 01:09, "Enterasys Customer Mailing List digest" <
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ENTERASYS Digest for Tuesday, October 08, 2013.
1. RE: Avaya IP phone subnet size
2. RE: Avaya IP phone subnet size
3. RE: Avaya IP phone subnet size
4. RE: Avaya IP phone subnet size
5. RE: Avaya IP phone subnet size
6. Re: Avaya IP phone subnet size
7. RE: Avaya IP phone subnet size
8. RE: Avaya IP phone subnet size
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 10:42:34 +0000
X-Message-Number: 1
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Monday, October 07, 2013 10:19 PM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 07:37:19 -0400
X-Message-Number: 2
Is the server on that same VLAN, i.e. do you have to route to get to the
server? Are you do you have an S series core? Have you put a port in that
VLAN and run wireshark see if there are any traffic anomalies? Have you
done a port mirror on a phone to verify that to COS is being set? How
frequantly do you see the issue? What tools do you have for monitoring?
We found a MIB for non-unicast traffic that has helped us track down a
source for broadcast packets in the past. We ended up applying a limit per
port for broadcasts to stabilize our network.
Sorry for so many questions. Feel free to call if you want to talk off
line. I'm very curious.
John
315-877-7178
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 08:01:28 -0400
X-Message-Number: 3
Hi Patrick,
Here are some of my thoughts for what theyre worth. J Let me know if they
help.
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind smaller
subnets is truly best practice going back a ways for broadcast issues in
the past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets by: geographical location, building by building, floor by
floor, port counts needed for each area. Having a separate VLAN for just
VOIP is also recommended by Avaya.
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine.
Two things here
· Since your routed, are you assigning QoS?
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer 2),
while other QoS mechanisms (such as
DiffServ<http://en.wikipedia.org/wiki/DiffServ>,
also known as DSCP) operate at the IP network layer (layer 3)
· Jitter issues are usually due to either slow or heavily congested
links. I would try to find out what link/s may be causing the issue; try
and upgrade the bandwidth where necessary.
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, youll solve the problem.
Thanks,
*Rob Kwiatkowski*
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
*There is nothing more important than our customers.*
*Sent:* Tuesday, October 08, 2013 6:43 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
*Sent:* Monday, October 07, 2013 10:19 PM
*To:* Enterasys Customer Mailing List
*Subject:* Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 12:52:24 +0000
X-Message-Number: 4
So you are saying just 1 voice vlan with multiple subnets? Because I was
told each subnet needed its own VLAN.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Tuesday, October 08, 2013 8:01 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
Hi Patrick,
Here are some of my thoughts for what they're worth. :) Let me know if
they help.
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind smaller
subnets is truly best practice going back a ways for broadcast issues in
the past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets - by: geographical location, building by building, floor by
floor, port counts needed for each area. Having a separate VLAN for just
VOIP is also recommended by Avaya.
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine.
Two things here -
* Since your routed, are you assigning QoS?
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer
2), while other QoS mechanisms (such as DiffServ<
http://en.wikipedia.org/wiki/DiffServ>, also known as DSCP) operate at
the IP network layer (layer 3)
* Jitter issues are usually due to either slow or heavily
congested links. I would try to find out what link/s may be causing the
issue; try and upgrade the bandwidth where necessary.
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, you'll solve the problem.
Thanks,
Rob Kwiatkowski
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
"There is nothing more important than our customers."
Sent: Tuesday, October 08, 2013 6:43 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Monday, October 07, 2013 10:19 PM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 13:00:05 +0000
X-Message-Number: 5
Questions can lead to answers; it's all good.
The servers are on the same vlan. S4 core. We did a wireshark trace and
the traffic had no anomalies that I am aware of. The vendor checked it as
well and said there were none. CoS has been confirmed via a wireshark on a
mirrored IP phone port. We use Cacti and NMS for monitoring our gear.
How did you apply the broadcast limit? Via policy?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Tuesday, October 08, 2013 7:37 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
Is the server on that same VLAN, i.e. do you have to route to get to the
server? Are you do you have an S series core? Have you put a port in that
VLAN and run wireshark see if there are any traffic anomalies? Have you
done a port mirror on a phone to verify that to COS is being set? How
frequantly do you see the issue? What tools do you have for monitoring?
We found a MIB for non-unicast traffic that has helped us track down a
source for broadcast packets in the past. We ended up applying a limit per
port for broadcasts to stabilize our network.
Sorry for so many questions. Feel free to call if you want to talk off
line. I'm very curious.
John
315-877-7178
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Monday, October 07, 2013 10:19 PM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: Re: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 09:04:55 -0400
X-Message-Number: 6
Hi Patrick,
I assume Rob is saying he used a separate Voice VLAN in each area (mapped
to each /24 bit subnet) - not that he had a single Voice VLAN across the
entire campus..
Back to the original problem statement - sometimes it's helpful on these
VoIP issues to try to narrow down the problem area.
Are you seeing jitter on all phones or only some phones?
On the phones seeing jitter, is it on all calls or only some calls?
Are you seeing jitter on internal calls and external calls?
Are you seeing jitter on calls between two phones within the same
VLAN/subnet?
Thanks!
David Jolie
ECE Networking
Sales Engineer
Enterasys Networks
Cell: +1.978.436.0726
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 06:12:20 -0700
X-Message-Number: 7
Typically I see one VLAN ID (VID) per subnet. For troubleshooting purposes
some use a piece of the network address for the VID. However, the same VID
can be used for all subnets if they are separated by layer 3 segments and
not on the same switch.
Rob Kwiatkowski | Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
There is nothing more important than our customers.
----- Original Message -----
Sent: 10/8/2013 8:53 AM
Subject: RE: [enterasys] Avaya IP phone subnet size
So you are saying just 1 voice vlan with multiple subnets? Because I
was told each subnet needed its own VLAN.
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
*Sent:* Tuesday, October 08, 2013 8:01 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size
Hi Patrick,
Here are some of my thoughts for what theyre worth. J Let me know if they
help.
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind smaller
subnets is truly best practice going back a ways for broadcast issues in
the past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets by: geographical location, building by building, floor by
floor, port counts needed for each area. Having a separate VLAN for just
VOIP is also recommended by Avaya.
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine.
Two things here
· Since your routed, are you assigning QoS?
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer 2),
while other QoS mechanisms (such as
DiffServ<http://en.wikipedia.org/wiki/DiffServ>,
also known as DSCP) operate at the IP network layer (layer 3)
· Jitter issues are usually due to either slow or heavily congested
links. I would try to find out what link/s may be causing the issue; try
and upgrade the bandwidth where necessary.
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, youll solve the problem.
Thanks,
*Rob Kwiatkowski*
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
*There is nothing more important than our customers.*
*Sent:* Tuesday, October 08, 2013 6:43 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
*Sent:* Monday, October 07, 2013 10:19 PM
*To:* Enterasys Customer Mailing List
*Subject:* Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 13:26:37 +0000
X-Message-Number: 8
That is what I thought, just was making sure.
Honestly, that is just a PITA. I know it is how it is, but I would think
that after so many years of networks existing that we would be in a better
situation. Very frustrating.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Tuesday, October 08, 2013 9:12 AM
To: Enterasys Customer Mailing List
Cc: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
Typically I see one VLAN ID (VID) per subnet. For troubleshooting purposes
some use a piece of the network address for the VID. However, the same VID
can be used for all subnets if they are separated by layer 3 segments and
not on the same switch.
Rob Kwiatkowski | Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
"There is nothing more important than our customers."
----- Original Message -----
Sent: 10/8/2013 8:53 AM
Subject: RE: [enterasys] Avaya IP phone subnet size
So you are saying just 1 voice vlan with multiple subnets? Because I was
told each subnet needed its own VLAN.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Tuesday, October 08, 2013 8:01 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
Hi Patrick,
Here are some of my thoughts for what they're worth. :) Let me know if
they help.
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind smaller
subnets is truly best practice going back a ways for broadcast issues in
the past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets - by: geographical location, building by building, floor by
floor, port counts needed for each area. Having a separate VLAN for just
VOIP is also recommended by Avaya.
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine.
Two things here -
* Since your routed, are you assigning QoS?
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer
2), while other QoS mechanisms (such as DiffServ<
http://en.wikipedia.org/wiki/DiffServ>, also known as DSCP) operate at
the IP network layer (layer 3)
* Jitter issues are usually due to either slow or heavily
congested links. I would try to find out what link/s may be causing the
issue; try and upgrade the bandwidth where necessary.
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, you'll solve the problem.
Thanks,
Rob Kwiatkowski
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
"There is nothing more important than our customers."
Sent: Tuesday, October 08, 2013 6:43 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Monday, October 07, 2013 10:19 PM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
---
END OF DIGEST
---
---1. RE: Avaya IP phone subnet size
2. RE: Avaya IP phone subnet size
3. RE: Avaya IP phone subnet size
4. RE: Avaya IP phone subnet size
5. RE: Avaya IP phone subnet size
6. Re: Avaya IP phone subnet size
7. RE: Avaya IP phone subnet size
8. RE: Avaya IP phone subnet size
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 10:42:34 +0000
X-Message-Number: 1
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Monday, October 07, 2013 10:19 PM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 07:37:19 -0400
X-Message-Number: 2
Is the server on that same VLAN, i.e. do you have to route to get to the
server? Are you do you have an S series core? Have you put a port in that
VLAN and run wireshark see if there are any traffic anomalies? Have you
done a port mirror on a phone to verify that to COS is being set? How
frequantly do you see the issue? What tools do you have for monitoring?
We found a MIB for non-unicast traffic that has helped us track down a
source for broadcast packets in the past. We ended up applying a limit per
port for broadcasts to stabilize our network.
Sorry for so many questions. Feel free to call if you want to talk off
line. I'm very curious.
John
315-877-7178
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.****
** **
*Patrick Printz*****
*Network Infrastructure*****
** **
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
** **
** **
When technology fails you, just call the help desk. (x4427/
** **
** **
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
jobrole, which assigns the vlan and CoS.****
** **
*Patrick Printz*****
*Network Infrastructure*****
** **
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
** **
** **
When technology fails you, just call the help desk. (x4427/
** **
** **
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
well."****
~Martin Luther King, Jr. ****
** **
** **
*Sent:* Monday, October 07, 2013 10:19 PM
*To:* Enterasys Customer Mailing List
*Subject:* Re: [enterasys] Avaya IP phone subnet size****
** **
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge?
How~Martin Luther King, Jr. ****
** **
** **
*Sent:* Monday, October 07, 2013 10:19 PM
*To:* Enterasys Customer Mailing List
*Subject:* Re: [enterasys] Avaya IP phone subnet size****
** **
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge?
so you assign Cos? ****
John****
wrote:****John****
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?****
****
*Patrick Printz*****
*Network Infrastructure*****
****
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
****
****
When technology fails you, just call the help desk. (x4427/
****
****
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
jobnetwork have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?****
****
*Patrick Printz*****
*Network Infrastructure*****
****
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
****
****
When technology fails you, just call the help desk. (x4427/
****
****
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
well."****
~Martin Luther King, Jr. ****
****
****
----------------------------------------------------------------------~Martin Luther King, Jr. ****
****
****
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 08:01:28 -0400
X-Message-Number: 3
Hi Patrick,
Here are some of my thoughts for what theyre worth. J Let me know if they
help.
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind smaller
subnets is truly best practice going back a ways for broadcast issues in
the past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets by: geographical location, building by building, floor by
floor, port counts needed for each area. Having a separate VLAN for just
VOIP is also recommended by Avaya.
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine.
Two things here
· Since your routed, are you assigning QoS?
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer 2),
while other QoS mechanisms (such as
DiffServ<http://en.wikipedia.org/wiki/DiffServ>,
also known as DSCP) operate at the IP network layer (layer 3)
· Jitter issues are usually due to either slow or heavily congested
links. I would try to find out what link/s may be causing the issue; try
and upgrade the bandwidth where necessary.
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, youll solve the problem.
Thanks,
*Rob Kwiatkowski*
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
*There is nothing more important than our customers.*
*Sent:* Tuesday, October 08, 2013 6:43 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
*Sent:* Monday, October 07, 2013 10:19 PM
*To:* Enterasys Customer Mailing List
*Subject:* Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 12:52:24 +0000
X-Message-Number: 4
So you are saying just 1 voice vlan with multiple subnets? Because I was
told each subnet needed its own VLAN.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Tuesday, October 08, 2013 8:01 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
Hi Patrick,
Here are some of my thoughts for what they're worth. :) Let me know if
they help.
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind smaller
subnets is truly best practice going back a ways for broadcast issues in
the past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets - by: geographical location, building by building, floor by
floor, port counts needed for each area. Having a separate VLAN for just
VOIP is also recommended by Avaya.
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine.
Two things here -
* Since your routed, are you assigning QoS?
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer
2), while other QoS mechanisms (such as DiffServ<
http://en.wikipedia.org/wiki/DiffServ>, also known as DSCP) operate at
the IP network layer (layer 3)
* Jitter issues are usually due to either slow or heavily
congested links. I would try to find out what link/s may be causing the
issue; try and upgrade the bandwidth where necessary.
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, you'll solve the problem.
Thanks,
Rob Kwiatkowski
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
"There is nothing more important than our customers."
Sent: Tuesday, October 08, 2013 6:43 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Monday, October 07, 2013 10:19 PM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 13:00:05 +0000
X-Message-Number: 5
Questions can lead to answers; it's all good.
The servers are on the same vlan. S4 core. We did a wireshark trace and
the traffic had no anomalies that I am aware of. The vendor checked it as
well and said there were none. CoS has been confirmed via a wireshark on a
mirrored IP phone port. We use Cacti and NMS for monitoring our gear.
How did you apply the broadcast limit? Via policy?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Tuesday, October 08, 2013 7:37 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
Is the server on that same VLAN, i.e. do you have to route to get to the
server? Are you do you have an S series core? Have you put a port in that
VLAN and run wireshark see if there are any traffic anomalies? Have you
done a port mirror on a phone to verify that to COS is being set? How
frequantly do you see the issue? What tools do you have for monitoring?
We found a MIB for non-unicast traffic that has helped us track down a
source for broadcast packets in the past. We ended up applying a limit per
port for broadcasts to stabilize our network.
Sorry for so many questions. Feel free to call if you want to talk off
line. I'm very curious.
John
315-877-7178
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Monday, October 07, 2013 10:19 PM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: Re: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 09:04:55 -0400
X-Message-Number: 6
Hi Patrick,
I assume Rob is saying he used a separate Voice VLAN in each area (mapped
to each /24 bit subnet) - not that he had a single Voice VLAN across the
entire campus..
Back to the original problem statement - sometimes it's helpful on these
VoIP issues to try to narrow down the problem area.
Are you seeing jitter on all phones or only some phones?
On the phones seeing jitter, is it on all calls or only some calls?
Are you seeing jitter on internal calls and external calls?
Are you seeing jitter on calls between two phones within the same
VLAN/subnet?
Thanks!
David Jolie
ECE Networking
Sales Engineer
Enterasys Networks
Cell: +1.978.436.0726
So you are saying just 1 voice vlan with multiple subnets? Because I was
told each subnet needed its own VLAN.****
** **
*Patrick Printz*****
*Network Infrastructure*****
** **
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
** **
** **
When technology fails you, just call the help desk. (x4427/
** **
** **
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
jobtold each subnet needed its own VLAN.****
** **
*Patrick Printz*****
*Network Infrastructure*****
** **
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
** **
** **
When technology fails you, just call the help desk. (x4427/
** **
** **
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
well."****
~Martin Luther King, Jr. ****
** **
** **
*Sent:* Tuesday, October 08, 2013 8:01 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size****
** **
Hi Patrick,****
****
Here are some of my thoughts for what theyre worth. J Let me know if
they help.****
****
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?****
****
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind
smaller~Martin Luther King, Jr. ****
** **
** **
*Sent:* Tuesday, October 08, 2013 8:01 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size****
** **
Hi Patrick,****
****
Here are some of my thoughts for what theyre worth. J Let me know if
they help.****
****
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?****
****
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind
subnets is truly best practice going back a ways for broadcast issues in
the past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets by: geographical location, building by building, floor
bythe past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets by: geographical location, building by building, floor
floor, port counts needed for each area. Having a separate VLAN for just
VOIP is also recommended by Avaya.****
****
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine. ****
Two things here ****
· Since your routed, are you assigning QoS?****
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer
2), while other QoS mechanisms (such as DiffServ<
http://en.wikipedia.org/wiki/DiffServ>,VOIP is also recommended by Avaya.****
****
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine. ****
Two things here ****
· Since your routed, are you assigning QoS?****
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer
2), while other QoS mechanisms (such as DiffServ<
also known as DSCP) operate at the IP network layer (layer 3)****
· Jitter issues are usually due to either slow or heavily
congested links. I would try to find out what link/s may be causing the
issue; try and upgrade the bandwidth where necessary.****
****
****
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, youll solve the problem.****
****
****
Thanks,****
****
*Rob Kwiatkowski* ****
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
*There is nothing more important than our customers.*****
****
*Sent:* Tuesday, October 08, 2013 6:43 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size****
****
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.****
****
*Patrick Printz*****
*Network Infrastructure*****
****
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
****
****
When technology fails you, just call the help desk. (
****
****
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
job· Jitter issues are usually due to either slow or heavily
congested links. I would try to find out what link/s may be causing the
issue; try and upgrade the bandwidth where necessary.****
****
****
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, youll solve the problem.****
****
****
Thanks,****
****
*Rob Kwiatkowski* ****
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
*There is nothing more important than our customers.*****
****
*Sent:* Tuesday, October 08, 2013 6:43 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size****
****
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.****
****
*Patrick Printz*****
*Network Infrastructure*****
****
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
****
****
When technology fails you, just call the help desk. (
****
****
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
well."****
~Martin Luther King, Jr. ****
****
****
*Sent:* Monday, October 07, 2013 10:19 PM
*To:* Enterasys Customer Mailing List
*Subject:* Re: [enterasys] Avaya IP phone subnet size****
****
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge?
How~Martin Luther King, Jr. ****
****
****
*Sent:* Monday, October 07, 2013 10:19 PM
*To:* Enterasys Customer Mailing List
*Subject:* Re: [enterasys] Avaya IP phone subnet size****
****
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge?
so you assign Cos? ****
John****
wrote:****John****
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?****
****
*Patrick Printz*****
*Network Infrastructure*****
****
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
****
****
When technology fails you, just call the help desk. (x4427/
****
****
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
jobnetwork have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?****
****
*Patrick Printz*****
*Network Infrastructure*****
****
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092 ****
w. 508-854-7517****
c. 508-726-9529****
****
****
When technology fails you, just call the help desk. (x4427/
****
****
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his
well."****
~Martin Luther King, Jr. ****
****
****
----------------------------------------------------------------------~Martin Luther King, Jr. ****
****
****
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 06:12:20 -0700
X-Message-Number: 7
Typically I see one VLAN ID (VID) per subnet. For troubleshooting purposes
some use a piece of the network address for the VID. However, the same VID
can be used for all subnets if they are separated by layer 3 segments and
not on the same switch.
Rob Kwiatkowski | Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
There is nothing more important than our customers.
----- Original Message -----
Sent: 10/8/2013 8:53 AM
Subject: RE: [enterasys] Avaya IP phone subnet size
So you are saying just 1 voice vlan with multiple subnets? Because I
was told each subnet needed its own VLAN.
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
*Sent:* Tuesday, October 08, 2013 8:01 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size
Hi Patrick,
Here are some of my thoughts for what theyre worth. J Let me know if they
help.
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind smaller
subnets is truly best practice going back a ways for broadcast issues in
the past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets by: geographical location, building by building, floor by
floor, port counts needed for each area. Having a separate VLAN for just
VOIP is also recommended by Avaya.
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine.
Two things here
· Since your routed, are you assigning QoS?
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer 2),
while other QoS mechanisms (such as
DiffServ<http://en.wikipedia.org/wiki/DiffServ>,
also known as DSCP) operate at the IP network layer (layer 3)
· Jitter issues are usually due to either slow or heavily congested
links. I would try to find out what link/s may be causing the issue; try
and upgrade the bandwidth where necessary.
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, youll solve the problem.
Thanks,
*Rob Kwiatkowski*
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
*There is nothing more important than our customers.*
*Sent:* Tuesday, October 08, 2013 6:43 AM
*To:* Enterasys Customer Mailing List
*Subject:* RE: [enterasys] Avaya IP phone subnet size
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
*Sent:* Monday, October 07, 2013 10:19 PM
*To:* Enterasys Customer Mailing List
*Subject:* Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
*Patrick Printz*
*Network Infrastructure*
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
)
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
----------------------------------------------------------------------
Subject: RE: Avaya IP phone subnet size
Date: Tue, 8 Oct 2013 13:26:37 +0000
X-Message-Number: 8
That is what I thought, just was making sure.
Honestly, that is just a PITA. I know it is how it is, but I would think
that after so many years of networks existing that we would be in a better
situation. Very frustrating.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Tuesday, October 08, 2013 9:12 AM
To: Enterasys Customer Mailing List
Cc: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
Typically I see one VLAN ID (VID) per subnet. For troubleshooting purposes
some use a piece of the network address for the VID. However, the same VID
can be used for all subnets if they are separated by layer 3 segments and
not on the same switch.
Rob Kwiatkowski | Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
"There is nothing more important than our customers."
----- Original Message -----
Sent: 10/8/2013 8:53 AM
Subject: RE: [enterasys] Avaya IP phone subnet size
So you are saying just 1 voice vlan with multiple subnets? Because I was
told each subnet needed its own VLAN.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Tuesday, October 08, 2013 8:01 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
Hi Patrick,
Here are some of my thoughts for what they're worth. :) Let me know if
they help.
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? I am being told by a telecom
vendor that the Avaya phones should reside on a subnet no larger than a
/24. Can anyone else confirm or deny this?
I managed an enterprise Avaya phone system at Hudson Valley Community
College for 4 years, 2008-2012. I believe the recommendation behind smaller
subnets is truly best practice going back a ways for broadcast issues in
the past. This is still true today as devices have to process every
broadcast. I would still try and keep subnet sizes to /24 or as close as
you can get to it that makes sense for your network topology. I used /24
and /23 subnets - by: geographical location, building by building, floor by
floor, port counts needed for each area. Having a separate VLAN for just
VOIP is also recommended by Avaya.
We are experiencing jitter on our phones and the CoS configuration on the
network side looks fine.
Two things here -
* Since your routed, are you assigning QoS?
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (layer
2), while other QoS mechanisms (such as DiffServ<
http://en.wikipedia.org/wiki/DiffServ>, also known as DSCP) operate at
the IP network layer (layer 3)
* Jitter issues are usually due to either slow or heavily
congested links. I would try to find out what link/s may be causing the
issue; try and upgrade the bandwidth where necessary.
In summary, I think if you have CoS and QoS configured properly; you
address the congested link/s, you'll solve the problem.
Thanks,
Rob Kwiatkowski
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
"There is nothing more important than our customers."
Sent: Tuesday, October 08, 2013 6:43 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
No routing at the edge currently. The phones Mac auth and get the proper
role, which assigns the vlan and CoS.
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517
c. 508-726-9529
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
Sent: Monday, October 07, 2013 10:19 PM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] Avaya IP phone subnet size
We just deployed an Avaya IP office system too. I cannot confirm or deny
whether it is necessary but we went with a seperate vlan per building for
voip. For us this means way less than a /24 per building. Although that
is how we setup our subnets. We have NAC and we assign a Phones policy
with a cos of 6 I believe. No problems. Are you routing at the edge? How
so you assign Cos?
John
I am wondering if anyone else who is running a Avaya IP Phones on their
network have limited their voice vlan size? We are experiencing jitter on
our phones and the CoS configuration on the network side looks fine. I am
being told by a telecom vendor that the Avaya phones should reside on a
subnet no larger than a /24. Can anyone else confirm or deny this?
Patrick Printz
Network Infrastructure
Quinsigamond Community College
670 West Boylston Street
Worcester, MA 01606-2092
w. 508-854-7517<tel:508-854-7517>
c. 508-726-9529<tel:508-726-9529>
When technology fails you, just call the help desk. (x4427/
"If a man is called a street sweeper, he should sweep streets even as
poetry. He should sweep streets so well that all the hosts of heaven and
Earth will pause to say, Here lived a great street sweeper who did his job
well."
~Martin Luther King, Jr.
---
END OF DIGEST
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