[cisco-voip] troubleshooting IP phone 7960 keepalives

[Jafar T]

I had this happen to one of my customers, we found that trunning off the
packet inspection on the firewall for Skinny fixed it, firewalls contexts
may have been confused about the skinny packets that passed through it,
causing the keepalives acknowledgement from the CallManagers to unsuccessfully
getting to the IP phones thus causing the phone to go into a reset mode

  ----- Original Message -----
  From: "Kevin Thorngren"
  To: "Justin Steinberg"
  Subject: Re: [cisco-voip] troubleshooting IP phone 7960 keepalives
  Date: Wed, 16 Nov 2005 15:18:10 -0500


  Hi Justin,

  Typically when you see the message "StationInit - Keep alive timeout"
  in the trace it is coming from CallManager. It seems strange that it
  would be a StationInit message but the timeout is coming from the
  StationInit process within the CallManager. CCM/SDL traces from the
  same time frame may help to confirm this. A packet capture of the
  problem would be best though.

  At some point, don't remember when, the KeepAliveAck message was
  taken
  out of the CCM trace. One thing you can do is to go backwards in the
  trace from the "Keep alive timeout" message and see when the last
  KeepAlive from the phone was. I suspect you will find one missing.

  HTH,
  Kevin

  On Nov 16, 2005, at 3:01 PM, Justin Steinberg wrote:

  > I have some phones that periodically reset themselves at random
  times
  > during the day, I even have some instances when the phone reset
  itself
  > while on an active call.
  >
  > When I look at a detailed callmanager trace i see the following
  entries:
  >
  > 11/15/2005 15:21:29.108 CCM|StationInit - Keep alive timeout.:
  > 000000741|> 2,100,90,1.1122347>
  > 11/15/2005 15:21:29.108 CCM|StationInit - Closing Station
  connection
  > DeviceName=SEP000C853Bxxxx, TCPHandle=000000741,
  > IPAddr=10.xxx.xxx.xxx, Port=52056, Device
  > Controller=[2,89,737]|> 10.xxx.xxx.xxx>> SEP000C853Bxxx>
  > 11/15/2005 15:21:29.108 CCM|DeviceUnregistered - Device
  unregistered.
  > Device name.:SEP000C853Bxxx Device IP address.:10.xxx.xxx.xxx
  Device
  > type. [Optional]:7 Device description [Optional].:John Johnson 1128
  > Reason Code [Optional].:8 App ID:Cisco CallManager Cluster
  > ID:xxxCMPUB01-Cluster Node
  >
  >
  > It seems like the phone is reporting to the CallManager that it is
  not
  > receiving keepalives and so the phone reboots. I noticed that
  > detailed callmanager traces log the incoming keepalives that the
  > phones send to CallManager. But I do not see the callManagers
  > KeepAliveAcks in the detailed CCM trace log. Do I have to run a
  > packet capture to see this?
  >
  > Also, the phones and CallManager are on the same lan - so
  latency/loss
  > SHOULD not be an issue.
  >
  > TIA
  >
  > justin
  >
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  >

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