Have you ever mistyped a command and the router thinks you want to telnet another device? Sure you have and so have I. The most common solution is to turn off name lookups. no ip domain-lookup This will tell the
Filtering traffic with a route-map
This post describes how to filter packets with a route-map. I have never used a route-map for the sole purpose of filtering packets before. I ran into this while doing a vol2 lab and the task was to filter ICMP
Filtering traffic with VLAN access maps
While doing a vol2 lab I got stumped by one of the tasks in the lab. The task was to filter ICMP packets coming from the backbone destined to a network on the internal routers. The topology looks like this.