Simple misconfiguration is a common cause of issues with AToM, so this section focuses on configuration of PE routers in an AToM environment. Configuration of provider (P) routers is identical to that discussed in the section “Configuring the P Router” in Chapter 6.
Note that it may be useful to reference Figure 7-14 as you read this section, although not all attachment circuit types are illustrated.
Configuration of the PE routers consists of seven steps:
Configure the loopback interface to be used as the LDP router ID.
Enable Cisco Express Forwarding ...