Dell POWERCONNECT 6200 SERIES Configuration Manual

Also see for POWERCONNECT 6200 SERIES: Getting started guide Getting started guide

Contents

152 MulticastExample #2: View IGMP Proxy Configuration DataYou can use various commands from Privileged EXEC or User EXEC modes to show IGMP proxyconfiguration data.• Use the following command to display a summary of the host interface status parameters. It displaysthe parameters only when IGMP Proxy is enabled.console#show ip igmp-proxyInterface Index................................ vlan 15Admin Mode..................................... EnabledOperational Mode............................... Disabled• Use the following command to display interface parameters when IGMP Proxy is enabled:console#show ip igmp-proxy interface• Use this command to display information about multicast groups that IGMP proxy reported. Itdisplays a table of entries with the following as the fields of each column.console#show ip igmp-proxy groups• Use the following command to display information about multicast groups that IGMP proxy reported.It displays a table of entries with the following as the fields of each column:console#show ip igmp-proxy groups detailDVMRPThe Distance Vector Multicast Routing Protocol (DVMRP) is one of several multicast routing protocolsyou can configure on the switch (PIM-SM and PIM-DM are the others). Note that only one multicastrouting protocol (MRP) can be operational on a router at any time.DVMRP is an interior gateway protocol; i.e., it is suitable for use within an autonomous system, but notbetween different autonomous systems.DVMRP is based on RIP: it forwards multicast datagrams to other routers in the AS and constructs aforwarding table based on information it learns in response. More specifically, it uses this sequence.• A new multicast packet is forwarded to the entire multicast network, with respect to the time-to-live(TTL) of the packet.• The TTL restricts the area to be flooded by the message.• All routers that do not have members on directly-attached subnetworks send backPrune messages tothe upstream router.• The branches that transmit a prune message are deleted from the delivery tree.• The delivery tree which is spanning to all the members in the multicast group, is constructed in theform of a DVMRP forwarding table.