[cisco-voip] Traffic Issues with 7900 Series Phones

[Pawlowski, Adam]

Tommy,

	Sorry about that. These are a mixed bag. 41/61 both G and G-GE phones, with the gigabit ones primarily. Some SCCP, some SIP, mostly 9.4.2SR1-1, but seen on 9.4.2SR2-2. PC attached or not, no difference, the only difference we've been able to create that stops this, is changing the data VLAN that runs through the phone to a different one, or something null (with no PC).

Adam

> -----Original Message-----
> From: Tommy Schlotterer [mailto:tschlotterer at presidio.com]
> Sent: Wednesday, November 02, 2016 2:37 PM
> To: Pawlowski, Adam; cisco-voip at puck.nether.net
> Subject: RE: Traffic Issues with 7900 Series Phones
> 
> What specific Models of phones eg. 41s/61s? or 40s/60s?
> 
> Thanks
> 
> Tommy
> 
> Tommy Schlotterer | Systems Engineer
> Presidio | www.presidio.com
> 20 N. Saint Clair, 3rd Floor, Toledo, OH 43604
> D: 419.214.1415 | C: 419.706.0259 | tschlotterer at presidio.com
> 
> -----Original Message-----
> From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of
> Pawlowski, Adam
> Sent: Wednesday, November 02, 2016 2:23 PM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] Traffic Issues with 7900 Series Phones
> 
> After much hair pulling and frustration, I wanted to ask the group here in
> case anyone has seen this or has any thought on what we should be looking
> for.
> 
> We have a number of 7900 series phones that have been exhibiting issues
> that appear to me to be that the phone is getting hung up on something.
> Some sort of frame or packet is screwing with the network chip/board or
> the OS which is causing it trouble. I see missed traffic, missed
> responses, high ICMP echo times - and phones that eventually get stuck
> with their ICMP echo response times being all over the board - with some
> report of call trouble and CMR showing crazy jitter. If I power cycle the
> phone that clears and it works fine for a while.
> 
> I realize these items are pretty much end of useful life, pretty much all
> done with software support, and are going to drop off of the compatibility
> matrix and probably functional support in the near future. But, while we
> still have a ton of them - has anyone noted any particular type of traffic
> that causes the 7900 series phones grief?
> 
> I don't have loss on the network, there do not seem to be any transient
> broadcast storms rolling by. We do see an increased amount of mDNS, IPv6
> (phones are v4 only) etc, but nothing stands out as causing a particular
> problem. It just seems that whatever this is, is causing a memory leak or
> something, wherein it gets bad enough that things go to hell eventually.
> 
> Any thoughts?
> 
> Adam P
> SUNYAB
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