Check the Accessibility of Two Routers on the Edge

Purpose

This section provides examples of how to use the ping command to check the reachability of various routers in a network topology, and how to use the traceroute command to check the path that packets travel between routers. The topology shown in Figure 17 illustrates these commands.

Figure 17: Topology for ping and traceroute Command Examples

The network in Figure 17 consists of two autonomous systems (ASs). AS 65001 includes two routers, and AS 65002 includes three routers. The border router (R1) in AS 65001 announces aggregated prefixes 100.100/24 to the AS 65002 network.

Steps To Take

To check the reachability of routers and the path to the routers, follow these steps:

1. Use Loopback Addresses
2. Use Interface Addresses