Example: Configuring PIM SSM on a Network

The following example shows how PIM SSM is configured between a receiver and a source in the network illustrated in Figure 1.

This example configures the IGMP version to IGMPv3 on all receiving host interfaces.

1. Enable IGMPv3 on all host-facing interfaces and disable IGMP on the fxp0.0 interface on Router 1.
   user@router1# set protocols igmp interface all version 3user@router1# set protocols igmp interface fxp0.0 disable

   Note: When you configure IGMPv3 on a router, hosts on interfaces configured with IGMPv2 cannot join the source tree.

2. After the configuration is committed, use the show configuration protocol igmp command to verify the IGMP protocol configuration.
   user@router1> show configuration protocol igmp
   [edit protocols igmp]interface all {version 3;}interface fxp0.0 {disable;}
3. Use the show igmp interface command to verify that IGMP interfaces are configured and that the fxp0.0 interface has IGMP disabled.
   
   

   user@router1> show igmp interface

   Interface      State    Querier      Timeout Version Groups
   fe-0/0/0.0     Up       198.58.3.245     213       3      0
   fe-0/0/1.0     Up       198.58.3.241     220       3      0
   fe-0/0/2.0     Up       198.58.3.237     218       3      0
   Configured Parameters:
   IGMP Query Interval (1/10 secs): 1250
   IGMP Query Response Interval (1/10 secs): 100
   IGMP Last Member Query Interval (1/10 secs): 10
   IGMP Robustness Count: 2
   Derived Parameters:
   IGMP Membership Timeout (1/10 secs): 2600
   IGMP Other Querier Present Timeout (1/10 secs): 2550
   

4. Use the show pim join extensive command to verify the PIM join state on Router 2 and Router 3 (the upstream routers).
   
   

   user@router2> show pim join extensive

   232.1.1.1       10.4.1.2                        sparse
        Upstream interface: fe-1/1/3.0
        Upstream State: Local Source
        Keepalive timeout: 209
        Downstream Neighbors:
           Interface: so-1/0/2.0
               10.10.71.1       State: Join   Flags: S    Timeout: 209
   

5. Use the show pim join extensive command to verify the PIM join state on Router 1 (the router connected to the receiver).
   
   

   user@router1> show pim join extensive

   232.1.1.1       10.4.1.2                        sparse
        Upstream interface: so-1/0/2.0
        Upstream State: Join to Source
        Keepalive timeout: 209
        Downstream Neighbors:
           Interface: fe-0/2/3.0
               10.3.1.1         State: Join   Flags: S    Timeout: Infinity