EIGRP Named Mode Configuration

Lessons Discussion
33

Hello Mehran

EIGRP named mode does not do away with the autonomous system numbers used by EIGRP. Under the address-family configuration, you must still specify an autonomous system number for the specific EIGRP domain. It is this autonomous system number that you must use when redistributing.

Note that EIGRP named mode may use a virtual instance name instead of a number, but it does not replace the AS. The AS is specified under the address-family command. Note the named EIGRP configuration of R1 from the lesson:

router eigrp MY_NAME
 !
 address-family ipv4 unicast autonomous-system 12
  !
  af-interface GigabitEthernet0/0
   authentication mode md5
   authentication key-chain MY_CHAIN
  exit-af-interface

In this scenario, if you were to redistribute from EIGRP to BGP, the autonomous system number you would use is 12.

I hope this has been helpful!

Laz