At 11:21 AM 24-01-02 +0200, Elijah Kagan wrote:
>I always thought that when a router forwards packets to Null0 it also
>generates ICMP Unreachable message to indicate this event. It seems that
>this is not the case on routers running CEF. I checked this on several
>platforms: 7500, 7200 and 3600. Whenever CEF is turned off I see those
>unreachables pouring in, with CEF on - nothing.
>Is this the expected behavior? Can anyone expand on this issue?
Hmmm. Try to make sure ICMP unreachables are "forced":
If still not, that is indeed weird and perhaps a bug.
>P.S. I am running 12.0(x)S on 7200 and 7500.
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