Example: Configuring the AMT Protocol


This example shows how to configure the Automatic Multicast Tunneling (AMT) Protocol to facilitate dynamic multicast connectivity between multicast-enabled networks across islands of unicast-only networks.


Before you begin:


In this example, Host 0 and Host 2 are multicast receivers in a unicast cloud. Their default gateway devices are AMT gateways. R0 and R4 are configured with unicast protocols only. R1, R2, R3, and R5 are configured with PIM multicast. Host 1 is a source in a multicast cloud. R0 and R5 are configured to perform AMT relay. Host 3 and Host 4 are multicast receivers (or sources that are directly connected to receivers). This example shows R1 configured with an AMT relay local address and an anycast prefix as its own loopback address. The example also shows R0 configured with tunnel services enabled.

Figure 1 shows the topology used in this example.

Figure 1: AMT Gateway Topology
AMT Gateway Topology


CLI Quick Configuration

To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the commands into the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Using the CLI Editor in Configuration Mode in the CLI User Guide.

To configure the AMT protocol on R1:

  1. Configure AMT tracing operations.

  2. Configure the AMT relay settings.

  3. Configure PIM on R1’s interfaces.

  4. Enable tunnel functionality.

  5. If you are done configuring the device, commit the configuration.


From configuration mode, confirm your configuration by entering the show chassis and show protocols commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.


To verify the configuration, run the following commands: