input errors/overruns on inside interface of Cisco ASA5520 (Version 8.2.5)
Posted on 2014-12-15
I have an ASA5520 running version 8.2.5. I am receiving a lot of input errors which are all overruns. Its doesn't seem to be affecting performance, but I would like to fix it. To help troubleshoot the problem I configured netflow on the ASA and have it send information to my solarwinds netflow collector. I have a 100Mbps internet circuit, and over the last month, I've only hit 50Mbps once, so it can't be an over subscription issue as I have lots of bandwidth to spare. Usually I'm well below 50Mbps. Now I'm getting the overruns on the inside interface. It is configured at 1GB and the switch that connects to it is also 1GB (Cisco 3560G). I'm reading that it could be bursts of traffic. How do I find out where these bursts of traffic are coming from and begin to troubleshoot? I could enable flow control, but doesn't that just put a bandage on the problem? I would really like to know what is happening. Cisco TAC's solution was to enable flow control, they wouldn't really go farther than that, and basically said they will do not more troubleshooting until flow control is enabled. Is this a viable solution? Any Suggestions or advice from some who has had a similar problem would be greatly appreciated. Thanks!