12-22-2012 06:40 AM - edited 03-07-2019 10:44 AM
Hi guys,
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.
Gleb.
Solved! Go to Solution.
12-22-2012 07:21 AM
Hi
configure " no ip unreachables" on the interfaces. This will disable sending icmp unreachable messages
Thanks
Raju
12-22-2012 06:01 PM
Hi
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"
Thanks
Raju
12-22-2012 07:21 AM
Hi
configure " no ip unreachables" on the interfaces. This will disable sending icmp unreachable messages
Thanks
Raju
12-22-2012 09:27 AM
Just curious....how processor intensive is this to send a simple "administratively prohibited unreachable" message?
12-22-2012 06:01 PM
Hi
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"
Thanks
Raju
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide