Some common commands to help with your BGP troubleshooting:
show ip bgp neighbor ip-address – Displays detailed neighbor information
show ip bgp – Displays all the routes in the BGP table
show ip bgp ip-prefix [mask subnet-mask] – Displays detailed information about all paths for a single prefix
debug ip tcp transactions – Displays all TCP transactions
debug ip bgp events [...]
Idle.
Active.
OpenSent.
OpenConfirm.
Established.
Keepalive are sent every [...]
To create an aggregate entry in the BGP routing table:
aggregate-address address mask
To advertise summary addresses only:
aggregate-address address [...]
When changes are made to a BGP session the changes are not activated until the BGP peering is reset. When the session is reset the routing tables are exchanged. This can cause interruptions. This is where soft reconfiguration helps. Changes can activated without clearing the entire session.
There are two types of soft reconfiguration. Inbound & Outbound. [...]
Main fixes would benefit anyone running BGP or OSPF on router OS.
Get the torrent [...]
BGP uses TCP port 179 for [...]
Display all BGP routes
show ip bgp cidr-only
Display routes with inconsistent originating ASes
show ip bgp inconsistent-as
Display all BGP paths
show ip bgp paths
Display stats of all BGP connections:
show ip [...]
Social Links