isis dis-priority
Function
The isis dis-priority command sets the priority of the IS-IS interface that is a candidate for the DIS at a specified level.
The undo isis dis-priority command restores the default priority.
By default, the DIS priority of broadcast IS-IS interfaces at Level-1 and Level-2 is 64.
Format
isis dis-priority priority [ level-1 | level-2 ]
undo isis dis-priority [ priority ] [ level-1 | level-2 ]
Parameters
| Parameter | Description | Value |
|---|---|---|
| priority | Specifies the priority for DIS election. | The value is an integer that ranges from 0 to 127. The default value is 64. A larger value indicates a higher DIS priority. |
| level-1 | Indicates the DIS priority of interfaces at Level 1. If the level is not specified, the same priority is set for Level-1 and Level-2 interfaces. | - |
| level-2 | Indicates the DIS priority of interfaces at Level 2. If the level is not specified, the same priority is set for Level-1 and Level-2 interfaces. | - |
Usage Guidelines
The configuration is useful only for the broadcast network.
The DIS priority is advertised through Hello packets. The switch with the highest priority is elected as the DIS. In the case of the same priority, the switch with the largest MAC address is elected as the DIS.
IS-IS has been enabled on the interface using the isis enable command.
If the isis circuit-type command is run to emulate the interface as a P2P interface, the isis dis-priority command becomes invalid on the interface; after the undo isis circuit-type command is run to restore the broadcast interface, the isis dis-priority command becomes valid on the interface.
Example
# Set the Level-2 priority for electing the DIS to 127 on VLANIF100.
<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 dis-priority 127 level-2
# Set the Level-2 priority for electing the DIS to 127 on GE0/0/1.
<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 dis-priority 127 level-2