Edge-Core ECS4660-28F Management Manual page 1862

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| IP Routing Commands

Border Gateway Protocol (BGPv4)

neighbor capability

orf prefix-list

BGP normally requires a router to terminate a peering session if it

receives an OPEN message with an unrecognized optional parameter.

This command allows new capabilities to be introduced gracefully,

without requiring a peering session to be terminated if a negotiated

capability is unknown.

With dynamic negotiation of capabilities is enabled, the capabilities by

both sides are negotiated in OPEN messages, with the partner

responding if a capability is supported or sending a NOTIFICATION if

Console(config-router)#neighbor 10.1.1.64 capability dynamic

Console(config-router)#

This command configures the negotiation of outbound route filter (ORF)

capabilities with a neighboring router. Use the no form to disable

negotiation.

[no] neighbor {ip-address | group-name} orf prefix-list {both |

receive | send}

ip-address – IP address of a neighbor.

group-name – A BGP peer group containing a list of neighboring

routers configured with the

both – Capability to send and receive the ORF to/from this

receive – Capability to receive the ORF from this neighbor.

send – Capability to send the ORF to this neighbor.

Router Configuration

When this command is entered, the side configured with inbound prefix-list

filter rules will transmit its own rules to the peer, and the peer will then use

these rules as its own outbound rules, thereby avoiding sending routes

which will be denied by its partner.

Console(config-router)#neighbor 10.1.1.64 orf prefix-list both

Console(config-router)#

neighbor peer-group

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