Patrick: What Avaya phones and server version are you using?
Thanks for following up with this info. John On Fri, Oct 11, 2013 at 11:08 AM, Patrick Printz <[email protected]>wrote: > 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 didn’t 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/ > [email protected])**** > > ** ** > > ** ** > > "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:[email protected]] > *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/[email protected])**** > > ** ** > > ** ** > > "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:[email protected]<[email protected]>] > > *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: [email protected]**** > > ”There is nothing more important than our customers.”**** > > > ----- Original Message ----- > From: Patrick Printz <[email protected]> > To: Enterasys Customer Mailing List <[email protected]> > 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/ > [email protected])**** > > **** > > **** > > "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:[email protected]] > *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. 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, you’ll solve the problem.**** > > **** > > **** > > Thanks,**** > > **** > > *Rob Kwiatkowski* **** > > Solutions Engineer, Upstate and Western NY > Enterasys Networks > Cell: 518.378-5177 > Email: [email protected]**** > > *”There is nothing more important than our customers.”***** > > **** > > *From:* Patrick Printz [mailto:[email protected]] > *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/[email protected])**** > > **** > > **** > > "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:[email protected]] > *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" <[email protected]> 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/ > [email protected])**** > > **** > > **** > > "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 [email protected] with > the body: unsubscribe enterasys [email protected] **** > > > - --To unsubscribe from enterasys, send email to [email protected] with > the body: unsubscribe enterasys [email protected] **** > > > - --To unsubscribe from enterasys, send email to [email protected] with > the body: unsubscribe enterasys [email protected] **** > > > - --To unsubscribe from enterasys, send email to [email protected] with > the body: unsubscribe enterasys [email protected] **** > > > - --To unsubscribe from enterasys, send email to [email protected] with > the body: unsubscribe enterasys [email protected] **** > > > - --To unsubscribe from enterasys, send email to [email protected] with > the body: unsubscribe enterasys [email protected] **** > > > - --To unsubscribe from enterasys, send email to [email protected] with > the body: unsubscribe enterasys [email protected] **** > > > - --To unsubscribe from enterasys, send email to [email protected] with > the body: unsubscribe enterasys [email protected] > > -- John Kaftan IT Infrastructure Manager Utica College --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected]
