It has only happend to each phone effected once, after that phone was restored it has not happend again to one of those phones. Here is a rundown of how the issues were resolved.
Switch # 1 First occurrence
Sunday morning we upgraded the switch to a new IOS version (from:
s72033-ipservicesk9-mz.122-18.SXF17b TO: s72033-ipservicesk9-mz.
122-33.SXI9)
Monday morning, soon after duty hours started we had several cards drop
connections. Upon review of incident we noticed that the Cisco phones were
down and that the network connection was disabled. Attempts were made to
re-enable the ports without success. Fix action for this Switch was to
revert back to the last IOS version.
Switch # 2 failure
Tuesday -located in another building. This was switch # 3 located in
that building, with the same failure as experienced on the first switch.
There were only two cards in the switch that failed. We were successful at
re-enabling the ports and also had to remove port security to keep the ports
from failing. Since this fix action we have experienced no more issues with
this switch.
Switch # 3
Wednesday - Another switch slot 1 and slot 2 failed with
the same symptoms. NO network connectivity and all Cisco phones down. After
re-enabling the ports and removal of port security the ports showed to be
connected, however the phones continued to seek IP addresses and there was
still no network connection. We performed a HW-module 1 reset and HW-Module
2 reset and after cards reset, the connections were restored. Since then we
have not experienced any further issues. Port security remains off until
further troubleshooting and isolation of problem.
I hope this is better clarification as to issues/events since new IOS was
loaded.
