Creating a BGP connection

A router ID is the unique identifier of a BGP router in an AS.
To ensure the uniqueness of a router ID and enhance network reliability, you can specify in BGP configuration context the IP address of a local loopback interface as the router ID.
If no router ID is specified in BGP context, the global router ID is used.
If the global router ID is used and then it is removed, the system will select a new router ID.
Unconfiguring the router ID in BGP context can make the system select a new router ID.

Follow these steps to create a BGP connection:

To do...	Use the command...	Remarks
Enter global configuration context	`configuration`
Enter BGP context	`router bgp as-number`	Not enabled by default
Enable BGP	`enable`
Specify a BGP Router ID	`bgp router-id ip-address`	Optional. By default, the global router ID is used.
Specify a neighbor and its AS number	`neighbor {ip-address}remote-as as-number`	Required
Configure a description for a neighbor	`neighbor {ip-address}description description-text`	Optional. Not configured by default

CAUTION:

Since a router can reside in only one AS, the router can run only one BGP process.