- allows the BGP neighbor to connect (sees the expected AS)
- but to maintain the loop-prevention, we also keep the original AS
- in case the advertised prefixes come back into the AS -- from a different path.
- The original-as and local-as will also be used on all prefixes received from that neighbor
- Same as local-as, BUT will not prepend the new local-as to any prefixes received from the BGP neighbor.
- no-prepend is a local router responsibility (neighbor does nothing different)
local-as no-prepend replace-as
- Aaaah The heck with it. Just replace our AS with the new one (i.e. we are in transition).
- Be careful. Loop prevention removed from these prefixes (for the original AS).
local-as no-prepend replace-as dual-as
- allow the neighbor to connect to either AS (original or new local-as)
Thank you El tigre for your reply
The original-as and local-as will also be used on all prefixes received from that neighb
Like i said before why it appends both the as in bgp updates,I had readed somewhere that it has been done to avoid loops,but i didn't see how it avoids loops by doing so ?