ECS4660-28F_Management Guide-R03

C HAPTER 51 | IP Routing Commands
Border Gateway Protocol (BGPv4)
– 1862 –
COMMAND USAGE
◆ 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
not.
EXAMPLE
Console(config-router)#neighbor 10.1.1.64 capability dynamic
Console(config-router)#
neighbor capability
orf prefix-list
This command configures the negotiation of outbound route filter (ORF)
capabilities with a neighboring router. Use the no form to disable
negotiation.
SYNTAX
[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 neighbor peer-group command.
both – Capability to send and receive the ORF to/from this
neighbor.
receive – Capability to receive the ORF from this neighbor.
send – Capability to send the ORF to this neighbor.
COMMAND MODE
Router Configuration
DEFAULT SETTING
Disabled
COMMAND USAGE
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.
EXAMPLE
Console(config-router)#neighbor 10.1.1.64 orf prefix-list both
Console(config-router)#