mpls te backup frr-in-use (Tunnel interface view)

Function

The mpls te backup frr-in-use command configures the system to use a TE FRR bypass tunnel if a primary CR-LSP fails (which means the primary CR-LSP is in the FRR In-use state) and attempts to set up a backup CR-LSP while attempting to restore the primary CR-LSP.

The undo mpls te backup frr-in-use command restores the default configuration.

By default, if a primary CR-LSP fails, the system uses a TE FRR bypass tunnel and attempts to restore the primary CR-LSP, but does not set up a backup CR-LSP.

Format

mpls te backup frr-in-use

undo mpls te backup frr-in-use

Parameters

None

Views

Tunnel interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mpls-te	write

Usage Guidelines

Usage Scenario

The mpls te backup frr-in-use command provides either of the following backup functions to protect traffic on a primary CR-LSP if the primary CR-LSP fails:

If ordinary backup is configured, traffic switches to a TE FRR bypass tunnel and the system attempts to set up an ordinary backup CR-LSP while attempting to restore the primary CR-LSP. If the ordinary backup CR-LSP is set up successfully before the primary CR-LSP is restored, traffic switches to the backup CR-LSP.
If hot standby is configured and a hot-standby backup CR-LSP is Up, traffic switches to a TE FRR bypass tunnel and immediately to the hot-standby backup CR-LSP, and the system attempts to restore the primary CR-LSP. Alternatively, if hot standby is configured but a hot-standby CR-LSP is Down, the follow-up procedure is the same as that in ordinary backup.
Configuring ordinary backup together with the mpls te backup frr-in-use command is recommended, saving bandwidth and improving tunnel security.

Prerequisites

Hot standby or ordinary backup has been enabled to protect end-to-end protection using the mpls te backup ordinary command, and TE FRR has been enabled to provide local protection by using the mpls te fast-reroute command.

Example

# Configure the system to set up a backup CR-LSP the same time it uses a TE FRR bypass tunnel and attempts to restore a primary CR-LSP if the primary CR-LSP fails.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] mpls te
[*HUAWEI-mpls] mpls rsvp-te
[*HUAWEI-mpls] quit
[*HUAWEI] interface tunnel 1
[*HUAWEI-Tunnel1] tunnel-protocol mpls te
[*HUAWEI-Tunnel1] destination 2.2.2.2
[*HUAWEI-Tunnel1] mpls te backup ordinary
[*HUAWEI-Tunnel1] mpls te fast-reroute
[*HUAWEI-Tunnel1] mpls te backup frr-in-use