Cisco Cisco IOS Software Release 12.2(27)SBC

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The MPLS EM—MPLS LSP Multipath Tree Trace feature provides the means to discover all possible 
equal-cost multipath (ECMP) routing paths of a label switched path (LSP) between an egress and ingress 
router. Once discovered, these paths can be retested on a periodic basis using Multiprotocol Label 
Switching (MPLS) LSP ping or traceroute. This feature is an extension to the MPLS LSP traceroute 
functionality for the tracing of IPv4 LSPs. 

You can use the MPLS Embedded Management (MPLS EM)—MPLS LSP Multipath Tree Trace feature 
to discover all paths for an IPv4 LSP. 

This implementation of the MPLS EM—MPLS LSP Multipath Tree Trace feature is based on RFC 4379, 
Detecting Multi-Protocol Label Switched (MPLS) Data Plane Failures. 

For information on the use of MPLS LSP ping and traceroute, see the 

feature module.

Cisco IOS MPLS Embedded Management (EM) is a set of standards and value-added services that 
facilitate the deployment, operation, administration, and management of MPLS-based networks in line 
with the fault, configuration, accounting, performance, and security (FCAPS) model.

Your Cisco IOS software release may not support all of the features documented in this module. To reach 
links to specific feature documentation in this module and to see a list of the releases in which each feature is 
supported, use the 

.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS 
software image support. To access Cisco Feature Navigator, go to 

. An 

account on Cisco.com is not required.