SmartSwitch Router User Reference Manual 203Chapter 14: Multicast Routing Configuration GuideTo prevent the SSR from forwarding any data destined to a scoped group on an interface,enter the following command in the Configure mode:Configuring a DVMRP TunnelThe SSR supports DVMRP tunnels to the MBONE (the multicast backbone of theInternet). You can configure a DVMRP tunnel on a router if the other end is runningDVMRP. The SSR then sends and receives multicast packets over the tunnel. Tunnels areCPU-intensive; they are not switched directly through the SSR’s multitasking ASICs.DVMRP tunnels need to be created before being enabled. Tunnels are recognized by thetunnel name. Once a DVMRP tunnel is created, you can enable DVMRP on the interface.The SSR supports a maximum of eight tunnels.To configure a DVMRP tunnel, enter the following command in Configure mode:You can also control the rate of DVMRP traffic in a DVMRP tunnel. The default rate is 500Kbps.To control the rate of DVMRP traffic, enter the following command in Configure mode:Monitoring IGMP & DVMRPYou can monitor IGMP and DVMRP information on the SSR.To display IGMP and DVMRP information, enter the following commands in the Enablemode.Configure the DVMRP scope. dvmrp set interface scopeConfigure a DVMRP tunnel to MBONE. dvmrp create tunnel local remote Configure the rate in a DVMRP tunnel. dvmrp set interface rateShow all interfaces runningDVMRP. Also shows the neighborson each interface.dvmrp show interfaceDisplay DVMRP routing table. dvmrp show routesShows all the interfaces andmembership details running IGMP.igmp show interface
