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 | [email protected]

-----Original Message-----
From: cisco-voip [mailto:[email protected]] On Behalf Of 
Pawlowski, Adam
Sent: Wednesday, November 02, 2016 2:23 PM
To: [email protected]
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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