184
[SwitchA] interface vlan-interface 101
[SwitchA-Vlan-interface101] pim sm
[SwitchA-Vlan-interface101] quit
[SwitchA] interface vlan-interface 102
[SwitchA-Vlan-interface102] pim sm
[SwitchA-Vlan-interface102] quit
The configuration on Switch B and Switch C is similar to that on Switch A. The configuration on Switch D
and Switch E is also similar to that on Switch A except that it is not necessary to enable IGMP on the
corresponding interfaces on these two switches.
3. Configure the SSM group range.
# Configure the SSM group range to be 232.1.1.0/24 on Switch A.
[SwitchA] acl number 2000
[SwitchA-acl-basic-2000] rule permit source 232.1.1.0 0.0.0.255
[SwitchA-acl-basic-2000] quit
[SwitchA] pim
[SwitchA-pim] ssm-policy 2000
[SwitchA-pim] quit
The configuration on Switch B, Switch C, Switch D and Switch E is similar to that on Switch A.
4. Verify the configuration.
Carry out the display pim interface command to view the PIM configuration and running status on each
interface. For example:
# View the PIM configuration information on Switch A.
[SwitchA] display pim interface
VPN-Instance: public net
Interface NbrCnt HelloInt DR-Pri DR-Address
Vlan100 0 30 1 10.110.1.1 (local)
Vlan101 1 30 1 192.168.1.2
Vlan102 1 30 1 192.168.9.2
Assume that Host A needs to receive the information a specific multicast source S (10.110.5.100/24)
sends to multicast group G (232.1.1.1). Switch A builds an SPT toward the multicast source. The
switches on the SPT path (Switch A and Switch D) have generated an (S, G) entry, but Switch E, which is
not on the SPT path, does not have multicast routing entries. Use the display pim routing-table command
to view the PIM routing table information on each switch. For example:
# View the PIM routing table information on Switch A.
[SwitchA] display pim routing-table
VPN-Instance: public net
Total 0 (*, G) entry; 1 (S, G) entry
(10.110.5.100, 232.1.1.1)
Protocol: pim-ssm, Flag:
UpTime: 00:13:25
Upstream interface: Vlan-interface101
Upstream neighbor: 192.168.1.2
RPF prime neighbor: 192.168.1.2
Downstream interface(s) information:
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