RFC1771 – you have control only over your AS, you cannt tell other AS how to route traffic passing through (attributes).
- Neighbors start in IDLE
- 1st Stage: ACTIVE
- 2nd Stage: OPEN SENT
- 3rd Stage: OPEN CONFIRMED
- 4th Stage: ESSTABLISHED
Hello messages sent every 60 sec and holddown timer as 180 sec
Authentication is MD5
Rule of syncronisation – Routes learnt by BGP must be validated by the interior routing table before they can be advertised to remote peers.
BGP SPlit Horizon – Routes learned via iBGP will never be sent to another iBGP peer (this is where route reflectors come into play).