The next lessons teach you how to configure various IP services, including the following:
Configuring ICMP redirects
Configuring the DRP Server Agent
Configuring IP accounting
In this lesson, you configure Ethernet 0 of R2 to disable the sending of ICMP redirects as well as ICMP unreachables. Disabling ICMP redirects has a secondary effect of also disabling the IP Path MTU Discovery (PMTU) mechanism, because PMTU depends on the router to send unreachables. Example 17-1 illustrates a possible configuration for R2 to complete this task.
Configuration items for R2: R2(config)#interface ethernet 0