668 CHAPTER 47: PIM CONFIGURATION
# Enable IP multicast routing on Switch A, enable PIM-SM on each interface, and
enable IGMPv3 on VLAN-interface 100, which connects Switch A to the stub
network.
<SwitchA> system-view
[SwitchA] multicast routing-enable
[SwitchA] interface vlan-interface 100
[SwitchA-Vlan-interface100] igmp enable
[SwitchA-Vlan-interface100] igmp version 3
[SwitchA-Vlan-interface100] pim sm
[SwitchA-Vlan-interface100] quit
[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 one 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
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 (232.1.1.1/24). Switch A builds an
SPT toward the multicast source. Switches on the SPT path (Switch A and Switch
D) have generated an (S, G) entry, while Switch E, which is not on the SPT path,
does not have multicast routing entries. You can 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
Total 0 (*, G) entry; 1 (S, G) entry
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