Reference Guide

208 | Border Gateway Protocol IPv4 (BGPv4)
www.dell.com | support.dell.com
For the router’s identifier, FTOS uses the highest IP address of the Loopback interfaces configured. Since
Loopback interfaces are virtual, they cannot go down, thus preventing changes in the router ID. If no
Loopback interfaces are configured, the highest IP address of any interface is used as the router ID.
To view the status of BGP neighbors, use the
show ip bgp neighbors command in EXEC Privilege mode
as shown in the example below. For BGP neighbor configuration information, use the
show
running-config bgp
command in EXEC Privilege mode as shown in the second example. Note that the
showconfig command in CONFIGURATION ROUTER BGP mode gives the same information as thew
show running-config bgp.
The following example displays two neighbors: one is an external and the second one is an internal BGP
neighbor. The first line of the output for each neighbor displays the AS number and states whether the link
is an external or internal.
The third line of the
show ip bgp neighbors output contains the BGP State. If anything other than
ESTABLISHED is listed, the neighbor is not exchanging information and routes. For more details on using
the
show ip bgp neighbors command, refer to the FTOS Command Line Interface Reference.