mpls te split-tunnel (TE tunnel association group view)

Function

The mpls te split-tunnel command adds a split tunnel to an existing associated tunnel group.

The undo mpls te split-tunnel command deletes a split tunnel.

By default, no split tunnel is added to an existing associated tunnel group.

Format

mpls te split-tunnel { interface-type interface-number | tunnel-name }

undo mpls te split-tunnel { interface-type interface-number | tunnel-name }

Parameters

Parameter	Description	Value
interface-type	Interface type.	-
interface-number	Interface number.	-
tunnel-name	Specifies the name of a split tunnel.	The name is a string of 1 to 63 case-sensitive characters, spaces not supported.

Parameter

Description

Value

interface-type

Interface type.

interface-number

Interface number.

tunnel-name

Specifies the name of a split tunnel.

The name is a string of 1 to 63 case-sensitive characters, spaces not supported.

Views

TE tunnel association group view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mpls-te	write

Usage Guidelines

Usage Scenario

When a device computes an optimal path for a tunnel and fails to establish the tunnel due to insufficient bandwidth resources, a tunnel can be split into two to balance traffic to increase the bandwidth and bandwidth use efficiency.

If a controller finds that an original tunnel in an associated tunnel group needs bandwidth resources more than the available bandwidth of the original tunnel to an extent, the controller creates a split tunnel for the original tunnel and adds the split tunnel to the associated tunnel group. The original and split tunnels in the associated tunnel group balance traffic. After the controller finds that the traffic transmitted through the associated tunnel group falls below a specified threshold, the controller automatically removes a split tunnel from the associated tunnel group and deletes the tunnel interface after a specified period of time.

Prerequisites

MPLS TE has been configured using the tunnel-protocol mpls te command on the tunnel interface of the split tunnel.

Precautions

A tunnel can function as a split tunnel and be added to an associated tunnel only after the split tunnel attribute is configured on the tunnel interface.
A tunnel can be added to a single associated tunnel group.
The original and split tunnels in an associated tunnel group must have the same destination IP address, protocol type, and bandwidth type.
The destination IP address, protocol type, and bandwidth type of the original and split tunnels in an associated tunnel group cannot be modified after the split tunnel is added.
The tunnel ID and tunnel interface of a split tunnel added to an associated tunnel group cannot be deleted.
If an SR-MPLS TE tunnel is configured as a split tunnel, node labels cannot be configured.

Example

# Add a split tunnel named Tunnel2 to an associated tunnel group.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] mpls te
[*HUAWEI-mpls] quit
[*HUAWEI] interface Tunnel1
[*HUAWEI-Tunnel1] tunnel-protocol mpls te
[*HUAWEI-Tunnel1] destination 4.4.4.4
[*HUAWEI-Tunnel1] mpls te tunnel-id 100
[*HUAWEI-Tunnel1] quit
[*HUAWEI] interface Tunnel2
[*HUAWEI-Tunnel2] tunnel-protocol mpls te
[*HUAWEI-Tunnel2] destination 4.4.4.4
[*HUAWEI-Tunnel2] mpls te tunnel-id 200
[*HUAWEI-Tunnel2] mpls te split-tunnel
[*HUAWEI-Tunnel2] quit
[*HUAWEI] mpls te associate-tunnel-group 1
[*HUAWEI-te-associate-group-1] mpls te original-tunnel Tunnel1
[*HUAWEI-te-associate-group-1] mpls te split-tunnel Tunnel2