Mpls-Tp Operations, Administration And Maintenance (Oam); Figure 16: Label For Lsp And Pw G-Ach Packets - Alcatel-Lucent 7450 Manual

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The system supports the G-ACh on static pseudowires and static LSPs.

MPLS-TP Operations, Administration and Maintenance (OAM)

This section details the MPLS-TP OAM mechanisms that are supported.

On-Demand Connectivity Verification (CV) using LSP-Ping

MPLS–TP supports mechanisms for on demand CC/CV as well as route tracing for LSPs and

PWs. These are required to enable an operator to test the initial configuration of a transport path,

or to assist with fault isolation and diagnosis. On demand CC/CV and route tracing for MPLS-TP

is based on LSP-Ping and is described in RFC6426. Three possible encapsulations are specified in

In IP-encapsulation, LSP-Ping packets are sent over the MPLS LSP for which OAM is being

performed and contain an IP/UDP packet within them. The On-demand CV echo response

message is sent on the reverse path of the LSP, and the reply contains IP/UDP headers followed by

the On-demand CV payload.

7450 ESS MPLS Guide

LSP OAM Packet

IP encapsulation, using the same label stack as RFC4379, or encapsulated in the IPv4 G-

ACh channel with a GAL/ACH

and non-IP encapsulation with GAL/ACH for LSPs and ACH for PWs.

PW OAM Packet

MPLS and RSVP