Configuring Ldp Discovery For Passive Targeted Hellos - Cisco ASR 9000 Series Configuration Manual

Configuring LDP Discovery for Passive Targeted Hellos

Related Topics
LDP Control Plane, on page 6
Configuring LDP Discovery for Targeted Hellos: Example, on page 53
Configuring LDP Discovery for Passive Targeted Hellos
Perform this task to configure LDP discovery for passive targeted hellos.
A passive side for targeted hello is the destination router (tunnel tail), which passively waits for an incoming
hello message. Because targeted hellos are unicast, the passive side waits for an incoming hello message to
respond with hello toward its discovered neighbor.
Before You Begin
Stable router ID is required at either end of the link to ensure that the link discovery (and session setup) is
successful. If you do not assign a router ID to the routers, the system defaults to the global router ID. Default
router IDs are subject to change and may cause an unstable discovery.
SUMMARY STEPS
1. configure
2. mpls ldp
3. router-id ip-address
4. discovery targeted-hello accept
5. Use the commit or end command.
6. (Optional) show mpls ldp discovery
DETAILED STEPS
Command or Action
Step 1 configure
Example:
RP/0/RSP0/CPU0:router# configure
Step 2
mpls ldp
Example:
RP/0/RSP0/CPU0:router(config)# mpls
ldp
Step 3 router-id ip-address
Example:
RP/0/RSP0/CPU0:router(config-ldp)#
router-id loopback 1
Cisco ASR 9000 Series Aggregation Services Router MPLS Configuration Guide, Release 4.3.x
26
Purpose
Enters global configuration mode.
Enters MPLS LDP configuration mode.
Specifies the router ID of the local node.
• In Cisco IOS XR software, the router ID is specified as an interface
name or IP address. By default, LDP uses the global router ID
(configured by global router ID process).
Implementing MPLS Label Distribution Protocol
OL-28381-02