[cisco-voip] 7900 series and ARP

[Pawlowski, Adam]

The phones are 7961G-GE's and 7941G-GE's. Load is 8.5.3S . I have a partial capture, not being mindful of my buffering when I was able to reproduce it, I missed call setup. Basically there is a bunch of broadcast ARP request from the destination phone to the originating phone but it does not reply. I toggled GARP from off to on, which shouldn't have really made a difference, and following is the start of the next call which then it answers the first request and the call begins. 

Except for that one instance I haven't been able to reliably reproduce it, only receive reports of the issue, and then I can see on the console log, from the phone, the ERR about not receiving any RTP packets. Of course within the last couple of loads the log just fills up with "CDP-D: holdThrd SendingCmd:proto:1 port:0" leaving us with only a short time window to observe, if the user happens to call in as soon as it happens.

If there is a theoretical scenario it may be easier to try and reproduce it here in a test environment, barraging the phone with some variety of traffic, if need be.

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Adam