Configure LDP

The Label Distribution Protocol (LDP) is instance-aware. It can be configured for the master instance at the [edit protocols ldp] hierarchy level, or for a routing instance at the [edit routing instances routing-instance-name protocols] hierarchy level.

[edit]

ldp {

    explicit-null;

    (deaggregate | no-deaggregate);

    egress-policy policy-name;

    export [ policy-name ];

    import [ policy-name ];

    graceful-restart {

        disable;

        helper-disable;

        maximum-recovery-time value;

        recovery-time value;

    }

    interface interface-name {

        apply-groups;

        disable;

        hello-interval seconds;

        hold-time seconds;

        transport-address (interface | loopback);

    }

    keepalive-interval seconds;

    keepalive-timeout seconds;

    no-forwarding;

    preference preference; 

    session address {

        authentication-key authentication-key;

    }

    traceoptions {

        apply-groups;

        file filename <replace> <size size> <files number> <no-stamp> 

            <(world-readable | no-world-readable)>; 

        flag flag <flag-modifier> <disable>; 

    }

    track-igp-metric;

    traffic-statistics {

        file filename <replace> <size size> <files number> 

            <(world-readable | no-world-readable)>;

        interval interval;

    }

    transport-address (router-id | loopback);

}

By default, LDP is disabled.

This chapter describes the minimum required LDP configuration and discusses the following configuration tasks:

• Minimum LDP Configuration
• Enable LDP
• Configure the LDP Hello Interval
• Configure the LDP Hold Time
• Configure the LDP Keepalive Interval
• Configure the LDP Keepalive Timeout
• Configure LDP Route Preferences
• Configure LDP Ultimate-Hop Popping
• Configure LDP Graceful Restart
• Configure LDP Received Label Filtering
• Configure LDP Outbound Label Filtering
• Enable LDP over RSVP-Established LSPs
• Configure LDP Transport Address Control
• Configure the LDP Egress Policy
• Configure FEC Deaggregation
• Configure the TCP MD5 Signature for LDP Session
• Trace LDP Protocol Traffic
• Collect LDP Statistics
• Configure LDP to Use the IGP Route Metric
• Configure the no-forwarding Statement
• Multiple-Instance LDP and Carrier-of-Carriers VPNs

For an LDP configuration example, see Example: LDP Configuration.