Enabling BGP ORF capabilities

About BGP ORF

BGP Outbound Route Filtering (ORF) saves the system resources by reducing the route updates that are sent between BGP peers.

The BGP peers negotiate the ORF capabilities through Open messages. After completing the negotiation process, the BGP peers can exchange ORF information (local route reception filtering policy) through route refresh messages. Then, only routes that pass both the local route distribution filtering policy and the received route reception filtering policy can be advertised.

Restrictions and guidelines

You can enable the ORF information sending, receiving, or both sending and receiving capabilities on a BGP router. For two BGP peers to successfully negotiate the ORF capabilities, make sure one end has the sending capability and the other end has the receiving capability.

Enabling BGP ORF capabilities

To enable BGP ORF capabilities (IPv4 unicast/IPv4 multicast):

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter BGP IPv4 unicast address family view, BGP-VPN IPv4 unicast address family view, or BGP IPv4 multicast address family view.	Enter BGP IPv4 unicast address family view: bgp as-number [ instance instance-name ] address-family ipv4 [ unicast ] Enter BGP-VPN IPv4 unicast address family view: bgp as-number [ instance instance-name ] ip vpn-instance vpn-instance-name address-family ipv4 [ unicast ] Enter BGP IPv4 multicast address family view: bgp as-number [ instance instance-name ] address-family ipv4 multicast	N/A
3. Enable BGP ORF capabilities.	peer { group-name \| ipv4-address [ mask-length ] } capability-advertise orf prefix-list { both \| receive \| send }	By default, BGP ORF capabilities are disabled.

To enable BGP ORF capabilities (IPv6 unicast/IPv6 multicast):

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter BGP IPv6 unicast address family view, BGP-VPN IPv6 unicast address family view, or BGP IPv6 multicast address family view.	Enter BGP IPv6 unicast address family view: bgp as-number [ instance instance-name ] address-family ipv6 [ unicast ] Enter BGP-VPN IPv6 unicast address family view: bgp as-number [ instance instance-name ] ip vpn-instance vpn-instance-name address-family ipv6 [ unicast ] Enter BGP IPv6 multicast address family view: bgp as-number [ instance instance-name ] address-family ipv6 multicast	N/A
3. Enable BGP ORF capabilities.	peer { group-name \| ipv6-address [ prefix-length ] } capability-advertise orf prefix-list { both \| receive \| send }	By default, BGP ORF capabilities are disabled.

Enabling nonstandard BGP ORF capabilities

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter BGP instance view or BGP-VPN instance view.

Enter BGP instance view:bgp as-number [ instance instance-name ]
Enter BGP-VPN instance view:
1. bgp as-number [ instance instance-name ]
2. ip vpn-instance vpn-instance-name

N/A

3. Enable nonstandard BGP ORF capabilities.

peer { group-name | ip-address [ mask-length ] | ipv6-address [ prefix-length ] } capability-advertise orf non-standard

By default, nonstandard BGP ORF capabilities are disabled.

To enable the BGP peers to exchange nonstandard ORF information, you must configure this command together with the peer capability-advertise orf prefix-list command.

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