David Croft
2004-Mar-18 18:29 UTC
[Asterisk-Users] Cisco IOS crash with multiple SIP endpoints behind NAT
Thought I'd drop a note here in case anyone else has been experiencing this. Cisco routers running NAT are liable to crash when doing NAT translation of SIP packets. Symptoms are a watchdog caused software abort in the "IP Input" process. The router then reloads. In my case this has been happening every ~24 hours with one SIP device behind the NAT and every ~15 minutes with three devices. Cisco have identified this as bug ID CSCed42990 (http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCed42990) but it is not yet fixed in a released version. You can get an interim release from TAC if you have a service contract. According to the bug description this only affects 12.3, but it definitely happened in the 12.2T train too (this is why we upgraded to 12.3). David