Chapter 49 Mpls Static Lsp And Frr Commands - Alcatel-Lucent OmniSwitch 6850-48 Cli Reference Manual

49 MPLS Static LSP and
MPLS forwarding is performed by routers called Label Switching Routers (LSRs). A Label Switched Path
(LSP) is a path through one or more LSRs.
There are two types of LSPs that are configurable using MPLS:
•
Static LSPs. A Static LSP specifies a statically defined path of LSRs. Configuration of label mappings
and MPLS actions is required on each router that will participate in the static path. No signaling proto-
col, such as the Label Distribution Protocol (LDP), is required, and there is no dependence on a gate-
way protocol topology or local forwarding table. Static LSPs are able to cross an Autonomous System
(AS) boundary.
•
Signaled LSP. The LSPs are set up using a signaling protocol, such as LDP. The signaling protocol
allows the automatic assignment of labels from an ingress router to the egress router. Signaling is trig-
gered by the ingress router, therefore configuration is only required on this router. A signaled LSP is
confined to one gateway protocol area and, therefore, cannot cross an AS boundary.
In addition to static LSPs, a static Fast Reroute feature is available that allows the configuration of backup
static LSP tunnels.FRR uses the backup tunnels for alternate routes in the event an LSP goes down.
This chapter provides information about the Command Line Interface (CLI) commands used to configure
static LSPs and backup static LSPs used by the FRR mechanism. For information about LDP commands
used to configure signaled LSPs, see
MIB information for static LSP is as follows:
Filename: TIMETRA-MPLS-MIB.mib
Module: TIMETRA-MPLS-MIB
MIB information for static FRR is as follows:
Filename: AlcatelStaticFrr.mib file
Module: ALCATEL-STATIC-FRR-MIB
The following table summarizes the available static LSP and static FRR commands:
OmniSwitch CLI Reference Guide
FRR Commands
Chapter 48, "MPLS LDP Commands."
June 2012 page 49-1