isis mesh-group

Function

The isis mesh-group command adds an IS-IS interface to a specified mesh group.

The undo isis mesh-group command deletes an IS-IS interface from a specified mesh group.

By default, an IS-IS interface does not belong to any mesh group and floods LSPs normally.

Format

isis mesh-group { mesh-group-number | mesh-blocked }

undo isis mesh-group

Parameters

Parameter	Description	Value
mesh-group-number	Specifies the mesh group number.	The value is an integer that ranges from 1 to 4294967295.
mesh-blocked	Blocks an interface to prevent it from flooding received LSPs to other interfaces.	-

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When receiving LSPs, the interface, not in the mesh group, floods the LSPs to other interfaces following the normal procedure. For the NBMA network that is with higher connectivity and several P2P links, this process causes repeated LSP flooding and wastes bandwidth.

After receiving LSPs, the interface that joins a mesh group only floods the LSPs to the interfaces that are not in the local mesh group.

Prerequisites

IS-IS has been enabled on the interface using the isis enable command.

Precautions

When adding interfaces to mesh groups or blocking interfaces, keep certain interfaces from being configured with the isis mesh-group command. This can prevent link faults from affecting the normal spreading of LSPs.

Example

# Add VLANIF100 to mesh group 3.

<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis mesh-group 3

# Add GE0/0/1 to mesh group 3.

<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] isis enable 1
[HUAWEI-GigabitEthernet0/0/1] isis mesh-group 3