ospf ldp-sync

Function

The ospf ldp-sync command enables LDP and OSPF synchronization on an interface.

The undo ospf ldp-sync command disables LDP and OSPF synchronization on an interface.

The ospf ldp-sync block command blocks LDP and OSPF synchronization on an interface.

The undo ospf ldp-sync block command unblocks LDP and OSPF synchronization on an interface.

By default, LDP and OSPF synchronization is not enabled on an interface. LDP and OSPF synchronization is not blocked on an interface.

Format

ospf ldp-sync

ospf ldp-sync block

undo ospf ldp-sync

undo ospf ldp-sync block

Parameters

None

Views

100GE interface view, 10GE interface view, 25GE sub-interface view, 25GE interface view, 400GE interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk interface view, FlexE interface view, GE optical interface view, GE electrical interface view, GMPLS-UNI interface view, Global VE sub-interface view, Tunnel interface view, VE sub-interface view, VLANIF interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
ospf	write

Usage Guidelines

Usage Scenario

By configuring LDP and OSPF synchronization, you can shorten traffic interruption when the traffic is switched from the backup link to the primary link and achieve the millisecond-level switchover.

The

ldp-sync enable command is run in the OSPF area view to enable LDP and OSPF synchronization on the following interfaces:

Interfaces with OSPF neighbors in the Up state on a P2P network
DRs' and non-DR/BDR devices' interfaces with OSPF neighbors in the Up state on a broadcast network
If LDP and OSPF synchronization is enabled on an interface that transmits important services, ensure that the interface is not on a standby link. LDP-IGP synchronization can be disabled on a specified interface of the
VRP.
You can block LDP-IGP synchronization on a specified interface of the device.

Precautions

The display ospf ldp-sync interface command can be used to display the synchronization status of an interface configured with LDP and OSPF synchronization.

Example

# Enable LDP and OSPF synchronization on GE 0/1/0.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] ospf ldp-sync block

# Enable LDP and OSPF synchronization on GE0/1/0.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] ospf ldp-sync