System information

BSR 64000 Configuration and Management Guide
12-44
Example
Network 200.10.0.0 is an illegal Class C network address. This address becomes legal
when it is represented in CIDR notation as 200.10.0.0/16. The /16 specifies that the
subnet mask consists of 16 bits (counting from left to right). Thus, the CIDR address,
200.10.0.0/16, is the same as 200.10.0.0 with a network mask of 255.255.0.0.
MOT(config)#router bgp 100
MOT(config-bgp)#aggregate-address 200.10.0.0 255.255.0.0
Assigning an Interface to BGP Session
To allow an BGP session to use any operational interface for TCP connections, use
the neighbor update-source command in Router BGP Configuration mode, as shown
below. You specify an IP address or peer-group and the interface. This feature is often
used in conjunction with loopback interfaces. Loopback interfaces are often used by
IBGP peers. The advantage of using loopback interfaces is that they eliminate
operational status and negotiated address dependencies that result from using the IP
address of a physical interface on the router to configure BGP. Loopback interfaces
are rarely used between EBGP peers because they are usually directly connected and
depend on a specific interface for connectivity.
1. To assign an Ethernet interface to the BGP session, use the neighbor
update-source command in Router BGP Configuration mode, as shown below:
MOT(config-bgp)#neighbor {<ip-address> | <name>} update-source
ethernet <slot> {/} <port>
where:
ip-address is the IP address of the BGP neighbor.
name is the name of the BGP peer group.
slot is the interface slot number.
port is the interface port number.
2. To assign a loopback interface to the BGP session, use the neighbor
update-source command in Router BGP Configuration mode, as shown below:
MOT(config-bgp)#neighbor {<ip-address> | <name>} update-source
loopback <num>
where: