neighbor prefix-list

Filters outgoing and incoming route updates to or from a particular BGP neighbor according to the length of its IP address and mask.

Syntax

neighbor { ip-address | ipv6-address | peer-group-name } prefix-list string { in | out }

no neighbor { ip-address | ipv6-address | peer-group-name } prefix-list string { in | out }

Command Default

This feature is disabled by default.

The no form of this command removes prefix list association from the BGP neighbor or peer-group.

Parameters

ip-address: IPv4 address of the neighbor
ipv6-address: IPv6 address of the neighbor
peer-group-name: Peer group name configured by the neighbor peer-group-name command.
string: Name of the prefix list. Range is from 1 through 63 ASCII characters.
in: Applies the filter in incoming routes.
out: Applies the filter in outgoing routes.

Modes

BGP address-family IPv4 unicast configuration mode

BGP address-family IPv6 unicast configuration mode

BGP address-family IPv4 unicast VRF configuration mode

BGP address-family IPv6 unicast VRF configuration mode

Usage Guidelines

Use the no form of the command to restore the defaults.

Examples

This example applies the prefix list "myprefixlist" to incoming advertisements to neighbor 10.11.12.13 for the default VRF.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv4 unicast
device(config-bgp-ipv4u)# neighbor 10.11.12.13 prefix-list myprefixlist in

This example applies the prefix list "myprefixlist" to outgoing advertisements to neighbor 2001:2018:8192::125 for the default VRF.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast
device(config-bgp-ipv6u)# neighbor 2001:2018:8192::125 prefix-list myprefixlist out

This example applies the prefix list "myprefixlist" to outgoing advertisements to neighbor 2001:2018:8192::125 for VRF instance "red," .

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast vrf red
device(config-bgp-ipv6u-vrf)# neighbor 2001:2018:8192::125 prefix-list myprefixlist out

This example applies the prefix list myipv6prefixlist to incoming advertisements to the neighbor 10.11.12.13 for the default VRF of address family IPv6 unicast mode.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast
device(config-bgp-ipv6u)# neighbor 10.11.12.13 prefix-list myipv6prefixlist in