From what I gather ICMP redirect is done when a gateway get an message which might have a destination same broadcast domain. I think I understand what you are saying but just to clarify, a …

In order to trigger an ICMP redirect message, the packet must arrive on the same interface the Router would use to forward the packet. Also ipv6 redirects should be enabled (default behavior). I set up a …

In IPv4, a host ignores redirects specifying a next-hop that is not on-link according to the link’s network mask. The IPv6 redirect mechanism is expected to be useful on nonbroadcast and shared media …

BFD will work without disabling ICMP redirects, and might not be a problem if you have only a few BFD peers, but at some point the CPU will be too busy generating the ICMP redirects. This is why ICMP …

no ip redirects--this disables icmp redirect messages. Redirects happen when a router recognizes a packet arriving on an interface and the best route is out that same interface. In that case the router …

ICMP redirect cache is empty CLIENT# SERVER#show ip route Default gateway is 10.2.5.100 Host Gateway Last Use Total Uses Interface ICMP redirect cache is empty SERVER# R1#show running …

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Jan 21, 2022 · Understanding ICMP Protocol with Wireshark in Real Time • Questions: • What is the MTU size of the ICMP packet at the Network Layer? • What is the MTU size of the ICMP packet at …

ICMP redirection works as expected in that case: host adds entry to the redirect cache, but router just ignores message. But I'm not so sure about IPv6 on cisco routers. Even when IPv6 unicast routing is …

almost every device is using type 5 code 1 icmp redirect for host even the device which have ip routing enabled why the router which have ip routing enabled received type 5 code 1 ? i thought that R4 will …