Evaluation of the AS-PATH attribute is well before evaluating if the route is learned from iBGP or eBGP.
Therefore, if the AS-PATH attribute of the iBGP route is shorter, then the BGP process will select the iBGP route.
If both AS-PATH attributes have the same length, then the eBGP route will be selected because its origin code is lower (the origin code of the ibgp route is incomplete, the origin code of the eBGP route is igp, I suppose).
Prefix lengths are not accounted for in the BGP path selection process because different prefix lengths mean different routes.
Admin distance is accounted for only in the routing table process, when the router should select between prefixes learned from different routing protocols.
My test was flawed, the IGP router redistrubuting prefix has a NH that was unknown to the second IGP router which has the EBGP session. as a result thsi latter RTR was only seeing EBG prefix as best despite the prepending.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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