BGP message types
New relation between two BGP peers:
- type 1
- Version4 (ipv4), AS#, Hold time, Router-iD, parameters.
- type 2
- Informs neighbors about withdrawn routes, changed routes, new routes.
- Used to exchange PAs and the Network Layer Reachability Information (NLRI).
(When adding the 220.127.116.11/24 on Router2 loopback2, and adding the network in the BGP config:)
- type 3
- Used to signal a BGP error. Typically resets the neighbor
- type 4
- Just the BGP header
BGP table / Commands
show ip bgp
show ip bgp neighbor 10.10.10.10 advertised-routes
show ip bgp neighbor 10.10.10.10 received-routes
show ip bgp neighbor 10.10.10.10 routes
show ip bgp sum