Just wondering if I can somehow to stop my router to send out ICMP "administratively prohibited unreachable" message when icmp packet are being blocked by ACL.
Don't want my router to waste it's CPU resources.
Thanks a lot.
Go to Solution.
configure " no ip unreachables" on the interfaces. This will disable sending icmp unreachable messages
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It is similar to packets getting process switched.
It can lead to high CPU if you receive lot of such packets which requires to send "icmp unreachables"
Just curious....how processor intensive is this to send a simple "administratively prohibited unreachable" message?
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