Configure BGP4+ Outbound Route Filtering

You can configure BGP4+ Outbound Route Filtering (ORF) in receive mode, send mode, or both, minimizing the number of BGP updates exchanged between BGP peers.

1. Access global configuration mode.
   

   device# configure terminal

2. Access BGP configuration mode.
   

   device(config)# router bgp

3. Access IPv6 address family configuration mode.
   

   device(config-bgp-router)# address-family ipv6 unicast

4. (For send mode only) Filter the incoming route updates from a specified BGP neighbor.
   

   device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 prefix-list myprefixlist in

   This example specifies the neighbor prefix-list command, the IPv6 address of the neighbor, a prefix list named myprefixlist, and the keyword in.
5. To advertise ORF send capabilities, run the neighbor capability orf prefixlist command with the send keyword.
   

   device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 capability orf prefixlist send

6. To advertise ORF receive capabilities, run the neighbor capability orf prefixlist command with the receive keyword.
   

   device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 capability orf prefixlist receive

7. To advertise both ORF send and receive capabilities, run the neighbor capability orf prefixlist command.
   

   device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 capability orf prefixlist

Example

The following example summarizes the commands for advertising ORF in receive mode.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast 
device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 capability orf prefixlist receive

Example

The following example summarizes the commands for advertising ORF in send mode.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast 
device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 prefix-list myprefixlist in
device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 capability orf prefixlist send

Example

The following example summarizes the commands for advertising ORF in both send and receive modes.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast 
device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 prefix-list myprefixlist in
device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 capability orf prefixlist