The isis silent command configures an IS-IS interface as a silent interface. That is, the interface is suppressed from sending and receiving IS-IS packets, but routes of the network segment on which the interface resides can be advertised.
The undo isis silent command restores the default setting.
By default, no IS-IS interface is configured as a silent interface.
| Parameter | Description | Value |
|---|---|---|
| advertise-zero-cost | Specifies the route cost as 0. The default cost of IS-IS routes is 10. | - |
When an IS-IS network is connected to other ASs, it is required to enable IS-IS on the interfaces that connect the IS-IS network to other ASs so that the switch on the IS-IS network can learn the routes to other ASs. This interface, however, unnecessarily advertises IS-IS Hello packets on its network segment. In this case, you can run the isis silent command to suppress the IS-IS interface.
Prerequisites
IS-IS has been enabled on the interface using the isis enable command.
# Configure VLANIF100 as a silent interface.
<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 silent
# Configure GE0/0/1 as a silent interface.
<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 silent