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New Member

Dropping of ICMP packets during periods of high load

I'm trying to diagnose a network problem where the main symptom is that ping packets seem to be occasionally dropped (< 2% of the time). I know that ICMP is low-priority and can be dropped during high load. I think that might be what's happening here, but it looks like it's happening as soon as the cpu utilization starts getting over 10%. Is that normal?

2 REPLIES
Cisco Employee

Re: Dropping of ICMP packets during periods of high load

Does the address that you are pinging belong to a router? If yes, it may be ok. But if you are pinging a pc through a router, then it is not normal. You shd try identify where the packets get droped/corrupted.

Rgds,

Gopal

New Member

Re: Dropping of ICMP packets during periods of high load

If I ping a host on the same LAN, I get no packet loss. If I ping the router interface or a host through the router I get a small amount of packet loss when the cpu utilization gets over about 10%.

The 'show interface' on the interface that I'm pinging (to which the LAN I'm pinging from is connected) shows:

Output queue 0/40, 0 drops; input queue 1/75, 0 drops

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