Hi, we just replaced an existing 2611 with a new 2811 router. Everything working fine except we are seeing this log from time to time:
Jan 23 20:49:26: %ARP-3-ARPINT: ARP table accessed at interrupt level 3
, -Traceback= 0x4153A7D0 0x40FD9708 0x40FD6E08 0x41ACA86C 0x41ACA92C 0x41AD6E54 0x4177A91C 0x41ABCC74 0x42824A14 0x4035E084 0x4006DAEC 0x42E965F8 0x42E93EA4 0x400469F0 0x4000FCC0
I tried search in Cisco but didn't find explanation on what caused it. Anyone also come across this and how to fix it? The IOS we are using is 12.4.15T1 and the router just set a few tunnels with OSPF. Thanks.
I had this issue last week on the same code. It was found to be the following bug: CSCse62295.
This DDTS is about traffic shaping over tunnel interfaces.
We realized that we are having problems related with ARP resolution.
We decoded the traceback found in the output of the log command and concluded that ARP resolution is occurring at interrupt level, that is usually forbidden, thus the error message.
Anyway, the good news is that the issue is not service impacting, since correct ARP resolution is also occurring at process level, as it should be.
So it's a cosmetic issue.
Related to the workaround:
As this is not service impacting, the only concern is about the error message.
There is at the moment no fixed downloadable release, so their advice is:
1. Simply to ignore these error messages;
2. Or to downgrade to 12.4(14)T or below images, that don't present this issue.
I would suggest you to try 12.4(3j) but it can be a problem for as you possibly don;t have access to downloads.