Hi all,
I will really appreciate if anyone can share how to read tftp trace file to know the reasons why firmware upgrade fails. The reason I am asking is that I have been upgrading phones, almost all phones are upgraded successfully (approx 10,000 phones), few phones were not so phones were physically power recycled and upgraded to new firmware (9.3.1.SR2) successfully. There are about 200 remote agents, who connect to CUCM via internet using vpn, many of these phones are not upgraded and sitting with old firmware (9.2.1), these phones were first reset using cucm Device --> Phone --> Reset, and later tried with power cycling, both attempts were un-successful. It is suspected that could be related with the poor internet connectivity (low latency/bandwidth), but wanted to know the root cause. Tried to replicate the issue in lab by setting up latency ( in vpn router) to 246 ms, the phone took approx 2 hrs to download firmware but it was upgraded successfully.
I have collected cisco tftp logs from cucm and see many reason codes 6 with the phones that were not upgraded, but i wanted to find out any key word like firmware upgrade request fail, or timeout etc with the phone mac or ip address.
Could anyone please help me to find root cause from Cisco tftp trace?
CUCM : 8.6.1SU1
Phones : 7942/7962
Centralized TFTP Server, two clusters
Also, any details to collect and analyze phone logs for this issue.
Much appreciated.
Azad
