To configure an LDP peer

Purpose

LDP performs the label distribution only in MPLS environments. The LDP operation begins with a hello discovery process to find LDP peers in the network. LDP peers are two LSRs that use LDP to exchange label or FEC mapping information. An LDP session is created between LDP peers. A single LDP session allows each peer to learn the label mappings (LDP is bi-directional) of the other peer and to exchange label binding information.

Steps
 
1 

In the navigation tree Routing view, expand Network→NE→Routing Instance→LDP.

2 

Right-click on the LDP icon and choose Properties.

3 

Configure an LDP peer.

Perform the following steps:

  1. Click on the Peers tab and click on Create or choose a peer and click Properties.

  2. Configure the required general LDP peer parameters.

    To use LDP DoD, the DoD Label Distribution parameter must be enabled for both peers. If the DoD Label Distribution parameter is not enabled for a peer, LDP DU is used.

  3. Configure the required parameters in the FEC panel to specify the number of LDP FECs that the LSR accepts from a given peer and adds into the LDP label database before the NFM-P raises an alarm.

    The LDP service must be up, and a session established between peers before the NFM-P raises an alarm. If the FEC value is above the Threshold parameter value, an implicitly cleared warning is raised. When the value falls below the threshold, the alarm is removed. If the FEC value goes above the FEC Limit parameter value, the NFM-P raises an implicitly cleared major alarm. When the value falls below the limit, but remains above the threshold, the MaxFECLimitReached alarm is cleared.

    You cannot configure the Log Only parameter if the FEC Limit parameter is set to 0.

    You cannot configure the Threshold parameter if the FEC Limit parameter is set to 0.

4 

To assign an authentication keychain to the LDP peer, click on the KeyChain tab and select an LDP peer keychain.

5 

Click on the Authentication tab and configure the Type and Key parameters.

6 

Click on the Import Policies tab and choose up to 5 import policies.

The FEC prefix Import Policy provides a mean of controlling which FEC prefixes received from other LDP and T-LDP peers should be re-distributed to this LDP peer. If no policy name is specified, the NE imports all of the FEC prefixes it learns from other LDP and T-LDP peers to this LDP peer.

7 

Click on the Export Policies tab and configure up to 5 export policies.

The FEC prefix Export Policy provides a mean of controlling which FEC prefixes from this peer should be re-distributed to all other LDP and T-LDP peers. If no policy name is specified, the NE will export all FEC prefixes it learns from this LDP peer to all other LDP and T-LDP peers.

8 

Save your changes and close the forms.

End of steps