Bgp-Eigrp-Bgp redistribution question

[marcusbrutus]

Hi Experts,

Just wish to ask if there is an option to retain the as-path information in eigrp when i redistribute from bgp to eigrp then to bgp?

I recall coming across something similar to this before but I can't seem to remember it.

Thanks in advance.

[Gustavo Coutinho · Accepted solution]

Hello friend.

No, you can't retain the AS-PATH when redistributing prefixes from BGP to EIGRP.

What you CAN do though, is to add the AS-PATH you want when redistributing it BACK to BGP.

You can do something like this:

1 - Add a TAG when redistributing the BGP prefixes into EIGRP

route-map SET_TAG permit 10
 set tag 100

!

router eigrp 1

redistribute bgp 100 metric 1 1 1 1 1 route-map SET_TAG

2 - transform the TAG into an AS_PATH, when redistributing it BACK to BGP.

route-map set-as-path-from-tag
set as-path tag

!

router bgp 100
redistribute eigrp 1 route-map set-as-path-from-tag

Got it ?

I hope this helps you !

cheers