We have a 2MB serial interface that is really busy and I was wondering what I could do to improve upon this config. I have included the config and a sh int s0/0 which happens to be the interface getting hammered. CPU proc is at 65% + continually and the process using the most CPU is IP @ 6.5%.
I was thinking of putting on WFQ as it should control traffic better than FIFO or am I wrong?
The output you provided indicates the reason for drops is the load on the link. The question is what do you want to do? Reduce the load or improve the chances for certain traffic to make it through? If you want to reduce the load then you will need to rate limit traffic toward that link (ie, at the ingress FE ints on the router). If you want to create a more fair utilization of the link (still dropping though) then WFQ or CBWFQ will help. Remember you have a 100Mb FE feeding a 2Mb Serial so your drops are expected.
You can enable CEF if the CPU utilisation is hitting high. Observe the type of traffic flowing through the router by enabling " ip route cache flow" on the ethernet. then issue "show ip cache flow" to check if ICMP traffic is high due to recent viruses.
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