isis ldp-sync block

Function

The isis ldp-sync block command blocks synchronization between LDP and IS-IS on a specified interface.

The undo isis ldp-sync block command restores the default configuration.

By default, an interface does not block synchronization between LDP and IS-IS.

Format

isis ldp-sync block

undo isis ldp-sync block

Parameters

None

Views

Ethernet interface view, Ethernet sub-interface view, Eth-Trunk interface view, Eth-Trunk sub-interface view, Tunnel interface view, Loopback interface view, Dialer interface view, VLANIF interface view, Virtual-Template interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The ldp-sync enable command run in the IS-IS view on a device enables synchronization between LDP and IS-IS on all local IS-IS interfaces. On an IS-IS interface transmits importance services, LDP and IS-IS synchronization may affect service transmission. If the link is working properly and an LDP session over the link fails, IS-IS sends link state PDUs (LSPs) to advertise the maximum cost of the link. As a result, IS-IS does not select the route for the link, which affects important service transmission.

To prevent the preceding problem, run the isis ldp-sync block command to block synchronization between LDP and IS-IS on the IS-IS interface that transmits important services.

Prerequisites

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

Example

# Block synchronization between LDP and IS-IS on GE 1/0/1.

<sysname> system-view

[sysname] interface GigabitEthernet 0/0/1

[sysname-GigabitEthernet0/0/1] isis enable 100

[sysname-GigabitEthernet0/0/1] isis ldp-sync block