isis padding-hello

Function

The isis padding-hello command configures an IS-IS interface to send Hello packets with the padding field.

The undo isis padding-hello command restores the default setting.

By default, an IS-IS interface is not configured to send Hello packets with the padding field.

Format

isis padding-hello

undo isis padding-hello

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

The isis padding-hello and isis small-hello commands are mutually exclusive and cannot be configured on the same interface simultaneously.

If an interface that is not configured with the two commands, it sends Hello packets based on the following rules:

For a P2P interface
- Before the P2P neighbor relationship is established, the P2P interface sends Hello packets with the padding field.
- After the P2P neighbor relationship is established, the P2P interface sends Hello packets without the padding field.
For a P2P interface, the length of the padding field is equal to the length of LSP packets generated by the local IS.
For a broadcast interface

It sends Hello packets with the padding field.

For a broadcast interface, the length of padding field is equal to the length of MTU.

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

Example

# Configure VLANIF100 to send Hello packets with the padding field.

<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 padding-hello

# Configure GE0/0/1 to send Hello packets with the padding field.

<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 padding-hello