EIGRP Basics (ROUTER ID)

EIGRP Router ID is an important component to EIGRP and is a way for EIGRP to identify each router that is participating in the EIGRP ASN domain.

The EIGRP enabled router uses the following 3 steps to determine its ID:

  1. Manual configuration within the EIGRP config
  2. Highest IPv4 address on an enabled and operating loopback interface
  3. Highest IPv4 address on an enabled and operating non loopback interface

Manually configuring an EIGRP Router ID:

Current EIGRP Router ID on Router 1:

Configuring a new EIGRP Router ID:

Router1#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#router eigrp 1
Router1(config-router)#eigrp router-id 1.1.1.1
Router1(config-router)#
Router1(config-router)#end

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