Technical Documentation

Configuring the Default Multicast Tunnel Source Address for Interoperability

By default, the local loopback address configured in a VPN routing and forwarding (VRF) routing instance is used as the source address when PIM hello messages, join messages, and prune messages are sent over multicast tunnel interfaces.

For compatibility with certain other vendors’ routers, the address used in the VRF routing instance for multicast tunnel interfaces must be the same as the primary loopback address configured in the default routing instance.

Note: Before configuring the loopback address used for PIM control messages to be the primary loopback address configured in the default routing instance, ensure that:

Before configuring the loopback address used for PIM control messages to be the primary loopback address configured in the default routing instance, ensure that:

  • The loopback address specified is configured in the default routing instance.
  • The inet address family is enabled on the interface.

To configure the router to use the lo0.0 primary loopback address configured in the default routing instance as the multicast tunnel interface address in all VRF routing instances:

For information about upgrading Juniper Networks routers from a software release that does not support the default-vpn-source configuration statement to a release that does, see the Juniper Networks JUNOS 10.1 Software Release Notes.


Published: 2010-04-16