mpls rsvp-te reliable-delivery

Function

The mpls rsvp-te reliable-delivery command enables reliable transmission for RSVP messages.

The undo mpls rsvp-te reliable-delivery command disables reliable transmission for RSVP messages.

By default, this function is disabled.

Format

mpls rsvp-te reliable-delivery

undo mpls rsvp-te reliable-delivery

Parameters

None

Views

MPLS view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mpls-te	write

Usage Guidelines

Usage Scenario

On a network without BFD configured, if a link intermittent disconnection occurs and an interface goes Down, RSVP-TE immediately tears down an LSP. The peer does not detect the interface status change and cannot reestablish the link after the interface goes Up again. As a result, services cannot be switched, and some traffic is dropped. To address the problem, run the mpls rsvp-te reliable-delivery command to enable reliable transmission for RSVP messages. This function increases the success rate of detecting link faults on the peer so that the peer immediately reestablishes a link, which minimizes link reestablishment stemming for interface message update timeouts. This function prevents long-time traffic loss.

Example

# Enable reliable RSVP message transmission.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] mpls te
[*HUAWEI-mpls] mpls rsvp-te
[*HUAWEI-mpls] mpls rsvp-te reliable-delivery