для Cisco Cisco IOS Software Release 12.2(14)SX

The participating PE routers must support the MPLS LSP ping feature. It is recommended that the 
Provider (P) routers also support the MPLS LSP Ping feature in order to obtain complete error reporting 
and diagnostics information.

For more information about the MPLS LSP Ping feature, see the 

.

The destination PE routers do not require the IP SLAs Responder to be enabled.

The Cisco IOS Release 12.2(27)SBC, Release 12.2(33)SRA, and Release 12.2(33)SXH implementation 
of the LSP Health Monitor feature supports only Layer 3 MPLS VPNs. These software releasse also 
support only single path connectivity measurements between the source PE router and associated Border 
Gateway Protocol (BGP) next hop neighbors.

The LSP Health Monitor feature provides the following key benefits:

End-to-end LSP connectivity measurements for determining network availability or testing network 
connectivity in MPLS networks

Proactive threshold violation monitoring through SNMP trap notifications and syslog messages

Reduced network troubleshooting time for MPLS networks

Scalable network error detection using fast retry capability

Creation and deletion of IP SLAs LSP ping and LSP traceroute operations based on network 
topology

Discovery of BGP next hop neighbors based on local VPN routing or forwarding instances (VRFs) 
and global routing tables