Example: Configuring the AMT Protocol

Requirements

Before you begin:

• Configure the router interfaces.
• Configure an interior gateway protocol or static routing. See the Junos OS Routing Protocols Library for Security Devices.
• Configure a multicast group membership protocol (IGMP or MLD). See Understanding IGMP and Understanding MLD.

Overview

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

Configuration

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, and then copy and paste the commands into the CLI at the [edit] hierarchy level.

Step-by-Step Procedure

1. Configure AMT tracing operations.

   [edit protocols amt traceoptions]user@host# set file amt.log user@host# set flag errors user@host# set flag packets detail user@host# set flag route detail user@host# set flag state detail user@host# set flag tunnels detail

2. Configure the AMT relay settings.

   [edit protocols amt relay]user@host# set relay family inet anycast-prefix 10.10.10.10/32 user@host# set family inet local-address 10.255.112.201 user@host# set tunnel-limit 10

3. Configure PIM on R1’s interfaces.

   [edit protocols pim]set interface all mode sparse-dense set interface all version 2 set interface fxp0.0 disable

4. Enable tunnel functionality.

   [edit chassis]set fpc 0 pic 0 tunnel-services bandwidth 1g

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

   user@host# commit

Results

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.

Verification

• show amt statistics
• show amt summary
• show amt tunnel