Hi Patrick
Install the latest version of firmware or software must always be one of
the first steps to run at a resolution of problems, especially in those
cases where the logic does not make sense. In general is resolved fairly
quickly, if the solution was well implemented.
Keep all the devices in the network on the same version is another
important thing.
Raúl Carbonari
From: Patrick Printz <***@qcc.mass.edu>
To: "Enterasys Customer Mailing List" <***@listserv.unc.edu>
Date: 11/10/2013 12:09 p.m.
Subject: RE: [enterasys] Avaya IP phone subnet size
Just to provide some follow-up on this issue, we may have found a
resolution. The network was determined to not be the cause of the problem
after presenting evidence to back my claims. The vendor informed us that
our voice network being on a /16 (which I know is too big, but didnât want
to go through the pain of shrinking it while rushed by a major issue) was
the cause of the problem. They said a /23 would fix things, but we would
still have the same number of hosts on that subnet. BTW, thanks to John
M. in GTAC for his help in the troubleshooting. Through wireshark(such an
awesome tool) traces on the vlan and capturing traces of phone calls while
the issue occurred, we were able to prove that
· The 400 hosts on the voice subnet were not generating more than
10p/s of broadcast traffic
· The data network was not spiking and hogging the pipe
· CoS was being applied, but did not even come in to play.
· The switches from the edge to the data center had no errors for
the ports used by the phone or servers.
· The call was clearly garbled during the call, but not when
played back in the wireshark trace
This all pointed to something on the phone itself. This led us to
installing the latest firmware for the phones and the servers, which
earlier on was deemed as not necessary. It is day two of having the new
firmware installed, and the phones seem to be happy. I am still cautiously
optimistic. Just wanted to share the results should the information
benefit someone else.
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/***@qcc.mass.edu)
"If a man is called a street sweeper, he should sweep streets even as
Michelangelo painted, or Beethoven composed music, or Shakespeare wrote
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.
From: Patrick Printz [mailto:***@qcc.mass.edu]
Sent: Tuesday, October 08, 2013 9:27 AM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] Avaya IP phone subnet size
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/***@qcc.mass.edu)
"If a man is called a street sweeper, he should sweep streets even as
Michelangelo painted, or Beethoven composed music, or Shakespeare wrote
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.
From: Robert Kwiatkowski [mailto:***@enterasys.com]
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
Email: ***@enterasys.com
âThere is nothing more important than our customers.â
----- Original Message -----
From: Patrick Printz <***@qcc.mass.edu>
To: Enterasys Customer Mailing List <***@listserv.unc.edu>
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/
***@qcc.mass.edu)
"If a man is called a street sweeper, he should sweep streets even as
Michelangelo painted, or Beethoven composed music, or Shakespeare wrote
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.
From: Robert Kwiatkowski [mailto:***@enterasys.com]
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 theyâre 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 â 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 â
· 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, youâll solve the problem.
Thanks,
Rob Kwiatkowski
Solutions Engineer, Upstate and Western NY
Enterasys Networks
Cell: 518.378-5177
Email: ***@enterasys.com
âThere is nothing more important than our customers.â
From: Patrick Printz [mailto:***@qcc.mass.edu]
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/***@qcc.mass.edu)
"If a man is called a street sweeper, he should sweep streets even as
Michelangelo painted, or Beethoven composed music, or Shakespeare wrote
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.
From: John Kaftan [mailto:***@utica.edu]
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
On Oct 7, 2013 9:53 PM, "Patrick Printz" <***@qcc.mass.edu> wrote:
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/
***@qcc.mass.edu)
"If a man is called a street sweeper, he should sweep streets even as
Michelangelo painted, or Beethoven composed music, or Shakespeare wrote
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.
--To unsubscribe from enterasys, send email to ***@unc.edu with the
body: unsubscribe enterasys ***@utica.edu
--To unsubscribe from enterasys, send email to ***@unc.edu with the
body: unsubscribe enterasys ***@qcc.mass.edu
--To unsubscribe from enterasys, send email to ***@unc.edu with the
body: unsubscribe enterasys ***@enterasys.com
--To unsubscribe from enterasys, send email to ***@unc.edu with the
body: unsubscribe enterasys ***@qcc.mass.edu
--To unsubscribe from enterasys, send email to ***@unc.edu with the
body: unsubscribe enterasys ***@enterasys.com
--To unsubscribe from enterasys, send email to ***@unc.edu with the
body: unsubscribe enterasys ***@qcc.mass.edu
--To unsubscribe from enterasys, send email to ***@unc.edu with the
body: unsubscribe enterasys ***@qcc.mass.edu
--To unsubscribe from enterasys, send email to ***@unc.edu with the
body: unsubscribe enterasys ***@tdec.com.br
---
To unsubscribe from enterasys, send email to ***@unc.edu with the body: unsubscribe enterasys gneu-***@gmane.org