Advertise/Redistribute iBGP routes/prefixes to eBGP neighbours.

[TranceforLife]

Hi All,

Guys don't judge me, but l have a very little knowledge about the BGP process (iBGP and eBGP) and looking for assistance.

Watched a nice video on youtube on how to advertise eBGP learned routes by iBGP peer to other iBGP peers using route reflector technic:

https://www.youtube.com/watch?v=yaMUq6WTUTc

This part is clear. We have a PA connected with eBGP and iBGP peers. eBGP peer cannot see iBGP networks. How can l accomplish this? Currently, no prefixes are visible by 3rd party eBGP peer.

reg,

Myky

[pulukas · Accepted solution]

I'm a little confused on your situation.

Route reflectors are needed only in iBGP peer setups.  iBGP requires a full mesh where all iBGP members send to all other members.  When this is not practical we setup route reflectors to make sure all of the internal routes are seen by all iBGP peers even when they cannot directly peer to each other.  This is not a function used or needed for eBGP.

Typically an eBGP peer will send all BGP routes available that match your export policy to the peer.  Are you saying there are BGP routes in your active table that are NOT being sent to the eBGP peer?

if so, we need to see the export policy and active route table.