protocols bgp <asn> neighbor <id> address-family ipv4-unicast capability orf prefix-list <state>
Advertises support for Outbound Route Filtering (ORF) for updating BGP capabilities advertised and received from this neighbor.
By default, the session is brought up with minimal capability on both sides.
- asn
- The number for the AS in which this router resides. The number ranges from 1 through 4294967295.
- id
- The IPv4 or IPv6 address of a BGP neighbor.
- prefix-list
- Advertise prefix-list ORF capability to this neighbor.
- receive
- Advertise the ability to receive the ORF from this neighbor.
- send
- Advertise the capability to send the ORF to this neighbor.
Configuration mode
protocols {
bgp asn {
neighbor id {
address-family {
ipv4-unicast {
capability {
orf {
prefix-list {
receive
send
}
}
}
}
}
}
}
}
In general, BGP-4 requires that if a BGP speaker receives an OPEN message with an unrecognized optional parameter, the speaker must terminate BGP peering. This makes it difficult to introduce new capabilities into the protocol. The Capabilities parameter allows graceful negotiation of BGP capabilities without requiring a peer to terminate peering.
This command specifies use of BGP Outbound Route Filtering (ORF) to send and receive capabilities. Using ORF minimizes the number of BGP updates that are sent between peer routers.
Use the set form of this command to specify BGP ORF capabilities to be used in capability negotiation.
Use the delete form of this command to remove the ORF capability.
Use the show form of this command to view BGP neighbor configuration settings.