Cisco Cisco IOS Software Release 12.0 S

The argument network specifies the IP address of a destination network, the argument mask specifies the 
network mask of a destination network, and the argument label specifies an incoming MPLS label.

For more information on the command syntax and for sample output, see the Cisco document
Cisco IOS Software Configuration for the Cisco 10720 Internet Router at the following location:

These features have been ported from Cisco IOS Release 12.0ST.

The following features appear under this feature heading:

Platforms: Cisco 7200 series, Cisco 7500/RSP series, Cisco 12000 series

The MPLS Label Distribution Protocol (LDP) feature is the Internet Engineering Task Force (IETF) 
standard protocol for label distribution. LDP provides the means for label switching routers (LSRs) to 
request, distribute, and release label prefix binding information to peer routers in a network. LDP is a 
two-party protocol that provides the means for LSRs to discover potential peers in a network and to 
establish LDP sessions with those peers for the purpose of exchanging label binding information.

Functionally, LDP is a superset of the prestandard Tag Distribution Protocol (TDP), which also supports 
Multiprotocol Label Switching (MPLS) forwarding along normally routed paths. In addition, for those 
features that LDP and TDP have in common, the pattern of protocol exchanges between platforms is 
identical. The differences between LDP and TDP for the features that both protocols support are largely 
embedded in their respective implementation details, such as the encoding of protocol messages.

This release, which supports both LDP and TDP, provides the means for transitioning an existing 
network from a TDP switching environment to an LDP switching environment. You can run LDP and 
TDP simultaneously on any given platform. The protocol that you use can be configured on a 
per-interface basis for directly connected neighbors and on a per-target basis for nondirectly connected 
(targeted) neighbors. In addition, a label-switched path (LSP) across an MPLS network can be supported 
by LDP on some hops and by TDP on other hops.

For more information, see the Cisco document at the following location:

 

This feature has been ported from Cisco IOS Release 12.0ST.