Configuring the LDP LSR ID
By default, the LSR-ID is the first available loopback interface address. However, you can specify an IP address of your choice to use as the LSR-ID for the LDP identifier.
Ensure that the LSR ID IP address is an operationally UP IP address on an enabled loopback interface.
Enter the following command to configure an LSR ID.
vyatta@R1# set protocols mpls-ldp lsr-id <ip address> The configured IP address selected as the LSR ID for LDP is an operationally UP IP address on an enabled loopback interface. You can configure only an IPv4 address.
The following example shows how to configure the LDP router ID as 1.1.1.1.
vyatta@R1# set protocols mpls-ldp lsr-id 1.1.1.1