Specifications

neighbor send-label explicit-null
MP-371
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
neighbor send-label explicit-null
To enable a Border Gateway Protocol (BGP) router to send Multiprotocol Label Switching (MPLS)
labels with explicit-null information for a CSC-CE router and BGP routes to a neighboring CSC-PE
router, use the neighbor send-label explicit-null command in address family configuration mode or
router configuration mode. To disable a BGP router from sending MPLS labels with explicit-null
information, use the no form of this command.
neighbor i
p-address send-label explicit-null
no neighbor i
p-address send-label explicit-null
Syntax Description
Command Default None
Command Modes Address family configuration
Router configuration
Command History
Usage Guidelines This command enables a CSC-CE router to use BGP to distribute MPLS labels with a value of zero for
e
xplicit-null instead of implicit-null along with IPv4 routes to a CSC-PE peer router.
You must issue this command only on the local CSC-CE router.
You can use this command only with IPv4 addresses.
Examples In the following CSC-CE example, CSC is configured with BGP to distribute labels and to advertise
e
xplicit null for all its connected routes:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# router bgp 100
Router(config-router)# neighbor 10.0.0.2 remote-as 300
Router(config-router)# address-family ipv4
ip-address IP address of the neighboring router.
Release Modification
12.0(27)S This command was introduced.
12.4 This command was integrated into Cisco IOS Release 12.4
12.2(28)SB This command was integrated into Cisco IOS Release 12.2(28)SB.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(33)SXH This command was integrated into Cisco IOS Release 12.2(33)SXH.