ldp-sync

Enables Multiprotocol Label Switching (MPLS) Label Distribution Protocol-Interior Gateway Protocol (LDP-IGP) synchronization globally with Intermediate System-to-Intermediate System (IS-IS) or Open Shortest Path First (OSPF), and configures the hold-down time interval.

Syntax

ldp-sync [ hold-down seconds ]

no ldp-sync [ hold-down ]

Command Default

Disabled.

Parameters

hold-down seconds: Sets the LDP-IGP synchronization hold-down time interval in seconds. The IGP must advertise the maximum IP metric while waiting for an update from the LDP. Valid values range from 1 through 65535 seconds. The default is 30.

Modes

OSPF router configuration mode

IS-IS address-family IPv4 unicast configuration mode

Usage Guidelines

The ldp-sync command supports point-to-point interfaces, but not tunnel interfaces.

This command affects IPv4 metrics only.

When enabled on IS-IS, consider the following:

The feature applies to both level-1 and level-2 metrics.
The wide metric-style is required.

The no ldp-sync command disables LDP-IGP synchronization.

The no ldp-sync hold-down command resets the hold down time interval to the default setting of 30 seconds.

MPLS and IS-IS are supported on the Extreme 8820, SLX 9740, SLX 9640, and SLX 9540 devices only.

Examples

The following example enables MPLS LDP-IGP synchronization globally with OSPF and IS-IS, and sets the hold-down time interval to 100 seconds.

device(config)# router ospf
device(config-router-ospf-vrf-default-vrf)# ldp-sync
device(config-router-ospf-vrf-default-vrf)# ldp-sync hold-down 100
device(config-router-ospf-vrf-default-vrf)# exit
device(config)# router isis
device(config-isis-router)# address-family ipv4 unicast
device(config-router-isis-ipv4u)# metric-style wide
device(config-router-isis-ipv4u)# ldp-sync
device(config-router-isis-ipv4u)# ldp-sync hold-down 100