H3C Technologies H3C S12500-X Series Switches - Manual (Page 53)

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Task Command
Display multicast forwarding
table information (in IRF mode).
display multicast [ vpn-instance vpn-instance-name ] forwarding-table
[ source-address [ mask { mask-length | mask } ] | group-address [ mask
{ mask-length | mask } ] | chassis chassis-number slot slot-number |
incoming-interface interface-type interface-number | outgoing-interface
{ exclude | include | match } interface-type interface-number | statistics ] *
Display information about the
multicast routing table.
display multicast [ vpn-instance vpn-instance-name ] routing-table
[ source-address [ mask { mask-length | mask } ] | group-address [ mask
{ mask-length | mask } ] | incoming-interface interface-type interface-number
| outgoing-interface { exclude | include | match } interface-type
interface-number ] *
Display information about the
static multicast routing table. display multicast [ vpn-instance vpn-instance-name ] routing-table static
[ source-address { mask-length | mask } ]
Display RPF route information
about the multicast source. display multicast [ vpn-instance vpn-instance-name ] rpf-info source-address
[ group-address ]
Clear statistics for multicast
forwarding events.
reset multicast [ vpn-instance vpn-instance-name ] forwarding event
Clear forwarding entries from
the multicast forwarding table.
reset multicast [ vpn-instance vpn-instance-name ] forwarding-table
{ { source-address [ mask { mask-length | mask } ] | group-address [ mask
{ mask-length | mask } ] | incoming-interface { interface-type
interface-number } } * | all }
Clear routing entries from the
multicast routing table.
reset multicast [ vpn-instance vpn-instance-name ] routing-table
{ { source-address [ mask { mask-length | mask } ] | group-address [ mask
{ mask-length | mask } ] | incoming-interface interface-type
interface-number } * | all }
NOTE:
When a routing entry is removed, the associated forwarding entry is also removed. When a forwarding
entry is removed, the associated routing entry is also removed.
Configuration examples
Changing an RPF route
Network requirements
PIM-DM runs in the network. All switches in the network support multicast. Switch A, Switch B and Switch
C run OSPF. Typically, the receiver host can receive the multicast data from the source through the path:
Switch A to Switch B, which is the same as the unicast route.
Perform the configuration so that the receiver host receives the multicast data from the source through the
path: Switch A to Switch C to Switch B, which is different from the unicast route.