computer:2:know

ICMP - (DUP!)

 If you encounter a problem where you ping a device and get the following output: 



64 bytes from 10.6.12.253: icmp_seq=1 ttl=62 time=55.9 ms

64 bytes from 10.6.12.253: icmp_seq=1 ttl=62 time=55.9 ms (DUP!)

64 bytes from 10.6.12.253: icmp_seq=2 ttl=62 time=54.0 ms

64 bytes from 10.6.12.253: icmp_seq=2 ttl=62 time=54.0 ms (DUP!)

64 bytes from 10.6.12.253: icmp_seq=3 ttl=62 time=41.0 ms

64 bytes from 10.6.12.253: icmp_seq=3 ttl=62 time=48.9 ms (DUP!)



> if there is routing involved, you should check if ICMP-Redirect is enabled on the routing device

> ICMP-Redirect is enabled by default on Aruba-CX Layer 3 Switches





>> Aruba-CX -> issue the following command:



>> no ip icmp redirect

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ICMP - (DUP!)