EIGRP redistributing named mode

When redistributing EIGRP into any other routing protocol, the command used references the autonomous system number of the EIGRP instance to be redistributed. For example, when redistributing from EIGRP to BGP the following commands would be used:

R1(config)#router bgp 1
R1(config-router)#redistribute eigrp 10

Where 10 is the autonomous system number of the EIGRP routing instance.

When using EIGRP named mode, the same command is used.

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 use of the AS. The AS is specified under the address-family command. Here is an example of a named EIGRP configuration:

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 for example, the autonomous system number you would use is 12.

Links:

https://forum.networklessons.com/t/eigrp-named-mode-configuration/1167/33?u=lagapides

https://networklessons.com/eigrp/eigrp-named-mode-configuration

https://networklessons.com/bgp/how-to-advertise-networks-in-bgp#Redistribution