Administrator Guide

Layer 3 Routing Commands 1330
It is common to use an IP address on a loopback interface as an update source
because a loopback interface is always reachable as long as any routing
interface is up. The peering session will stay up as long as the loopback
interface remains reachable. If you use an IP address on a routing interface,
then the peering session will go down if that interface goes down.
Command History
Introduced in version 6.2.0.1 firmware.
Updated in version 6.3.0.1 firmware.
Example
console(config-router)#neighbor 10.130.14.55 update-source 100
network (BGP Router Configuration)
The network command configures BGP to advertise an address prefix.The
prefix is only advertised if the common routing table includes a non-BGP
route with the same prefix. The route may be a connected route, a static
route, or a dynamic route from another routing protocol.
Syntax
network prefix mask network-mask [ route-map rm-name ]
no network prefix mask network-mask [ route-map rm-name ]
network ipv6-prefix/prefix-length [ route-map rm-name ]
no network ipv6-prefix/prefix-length
• prefix—An IPv4 address prefix in dotted decimal notation.
• network-mask—The network mask for the prefix in dotted-quad notation
(e.g., 255.255.0.0) where a zero bit in the mask indicates a don’t care
condition for the corresponding address bits.
• ipv6-prefix—An IPv6 network prefix. This argument must be in the form
documented in RFC 2373 where the address is specified in hexadecimal
using 16-bit values between 0x00 and 0xff and separated by colons.