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# mpls ldp graceful-restart

#### Syntax

mpls ldp graceful-restart [ helper ]

no mpls ldp graceful-restart

#### Release Information

Command introduced in JUNOSe Release 7.1.0.

#### Description

Enables LDP graceful restart to preserve MPLS forwarding state across a restart, and helper mode, or only helper mode. LDP graceful restart and helper mode are both disabled by default. The no version disables both LDP graceful restart and helper mode.

Graceful restart causes the fault tolerant session TLV to be included in LDP initialization messages with a nonzero value for the reconnect timeout. This action announces to neighbors that the router preserves its forwarding state cross a restart.

Helper mode causes the fault tolerant session TLV to be included in LDP initialization messages. The reconnect timeout value in the TLV is zero when LDP graceful restart is disabled. This TLV announces to neighbors that the router preserves any label-FEC mapping it has received from a neighbor in the event that the neighbor performs an LDP graceful restart.

#### Options

- helper—Configures only helper mode to preserve label-FEC mappings from a neighbor in the event the neighbor gracefully restarts

#### Mode

Global Configuration

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