MPLS LDP Autoconfiguration
The MPLS LDP Autoconfiguration feature enables you to globally configure Label Distribution Protocol
(LDP) on every interface associated with a specified Interior Gateway Protocol (IGP) instance.
•Finding Feature Information, page 51
•Restrictions for MPLS LDP Autoconfiguration , page 51
•Information About MPLS LDP Autoconfiguration, page 52
•How to Configure MPLS LDP Autoconfiguration, page 52
•Configuration Examples for MPLS LDP Autoconfiguration, page 61
•Additional References, page 62
•Feature Information for MPLS LDP Autoconfiguration, page 63
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature
information and caveats, see the release notes for your platform and software release. To find information
about the features documented in this module, and to see a list of the releases in which each feature is
supported, see the Feature Information Table at the end of this document.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Restrictions for MPLS LDP Autoconfiguration

•In Cisco IOS Release 12.0(32)SY, the mpls ldp autoconfig command is supported only with OSPF.
Other IGPs are not supported.
•If LDP is disabled globally, the mpls ldp autoconfigcommand fails and generates a console message
explaining that LDP must first be enabled globally by means of the global mpls ip command.
•If the mpls ldp autoconfig command is configured for an IGP instance, you cannot issue the global no
mpls ip command. To disable LDP, you must first issue the no mpls ldp autoconfig command.
• For interfaces running IS-IS processes, you can enable Multiprotocol Label Switching (MPLS) for
each interface, using the router mode command mpls ldp autoconfig or mpls ldp igp autoconfig at
the interface level.
• You specify that the default label distribution protocol is LDP for a router or for an interface. Tag
Distribution Protocol (TDP) is not supported.
• The MPLS LDP Autoconfiguration feature is not supported on traffic engineering tunnel interfaces.
MPLS LDP Configuration Guide, Cisco IOS Release 12.4
51