Month: October 2018

As of IOS 15.0(1)M Cisco introduced named mode, and the previous version of EIGRP was retrospectively termed classic mode. Named mode is the preferred method of configuration on all routers that support it. Going forward any new features developed for EIGRP will only be available in named mode. However named mode is backwards compatible with classic mode. The actual under lying code has not changed (except for new commands) just the way EIGRP is configured.

Previous EIGRP interface based commands have now been moved under the router eigrp <name> configuration section.

The following is a typical IPv4 example of name mode:

router eigrp cisco
 !
 address-family ipv4 unicast autonomous-system 100
  !
  af-interface default
   authentication mode hmac-sha-256 7 044B0A151C36435C0D
   hello-interval 1
   hold-time 3
  exit-af-interface
  !
  topology base
   maximum-paths 6
   redistribute static route-map static-network
  exit-af-topology
  network 0.0.0.0
 exit-address-family

Here you can see EIGRP is using AS number 100. In named mode the name is not significant and does not need to match, however the AS number does need to match. Commands applicable to all interfaces are placed under the af-interface default section.

The topology base section is where the general EIGRP topology commands are placed, and finally the network commands are placed under the general address family.