IGMP SSM mapping configuration example
Network requirements
As shown in Figure 39:
OSPF runs on the network.
The PIM-SM domain uses both the ASM model and SSM model for multicast delivery. VLAN-interface 104 on Switch D acts as the C-BSR and C-RP. The SSM group range is 232.1.1.0/24.
IGMPv3 runs on VLAN-interface 400 of Switch D. The receiver host runs IGMPv2, and does not support IGMPv3. The receiver host cannot specify multicast sources in its membership reports.
Source 1, Source 2, and Source 3 send multicast packets to multicast groups in the SSM group range 232.1.1.0/24.
Configure the IGMP SSM mapping feature on Switch D so that the receiver host can receive multicast data only from Source 1 and Source 3.
Figure 39: Network diagram
Table 7: Interface and IP address assignment
Device | Interface | IP address | Device | Interface | IP address |
|---|---|---|---|---|---|
Source 1 | — | 133.133.1.1/24 | Source 3 | — | 133.133.3.1/24 |
Source 2 | — | 133.133.2.1/24 | Receiver | — | 133.133.4.1/24 |
Switch A | Vlan-int100 | 133.133.1.2/24 | Switch C | Vlan-int300 | 133.133.3.2/24 |
Switch A | Vlan-int101 | 192.168.1.1/24 | Switch C | Vlan-int103 | 192.168.3.1/24 |
Switch A | Vlan-int104 | 192.168.4.2/24 | Switch C | Vlan-int102 | 192.168.2.2/24 |
Switch B | Vlan-int200 | 133.133.2.2/24 | Switch D | Vlan-int400 | 133.133.4.2/24 |
Switch B | Vlan-int101 | 192.168.1.2/24 | Switch D | Vlan-int103 | 192.168.3.2/24 |
Switch B | Vlan-int102 | 192.168.2.1/24 | Switch D | Vlan-int104 | 192.168.4.1/24 |
Configuration procedure
Assign an IP address and subnet mask to each interface, as shown in Figure 39. (Details not shown.)
Configure OSPF on the switches in the PIM-SM domain. (Details not shown.)
Enable IP multicast routing, PIM-SM, and IGMP:
# On Switch D, enable IP multicast routing.
<SwitchD> system-view [SwitchD] multicast routing [SwitchD-mrib] quit
# Enable IGMPv3 on the receiver-side interface (VLAN-interface 400).
[SwitchD] interface vlan-interface 400 [SwitchD-Vlan-interface400] igmp enable [SwitchD-Vlan-interface400] igmp version 3 [SwitchD-Vlan-interface400] quit
# Enable PIM-SM on the other interfaces.
[SwitchD] interface vlan-interface 103 [SwitchD-Vlan-interface103] pim sm [SwitchD-Vlan-interface103] quit [SwitchD] interface vlan-interface 104 [SwitchD-Vlan-interface104] pim sm [SwitchD-Vlan-interface104] quit
# On Switch A, enable IP multicast routing.
<SwitchA> system-view [SwitchA] multicast routing [SwitchA-mrib] quit
# Enable PIM-SM on each interface.
[SwitchA] interface vlan-interface 100 [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 104 [SwitchA-Vlan-interface104] pim sm [SwitchA-Vlan-interface104] quit
# Configure Switch B and Switch C in the same way Switch A is configured. (Details not shown.)
On Switch D, configure VLAN-interface 104 as a C-BSR and a C-RP.
[SwitchD] pim [SwitchD-pim] c-bsr 192.168.4.1 [SwitchD-pim] c-rp 192.168.4.1 [SwitchD-pim] quit
Configure the SSM group range:
# On Switch D, specify 232.1.1.0/24 as the SSM group range.
[SwitchD] acl basic 2000 [SwitchD-acl-ipv4-basic-2000] rule permit source 232.1.1.0 0.0.0.255 [SwitchD-acl-ipv4-basic-2000] quit [SwitchD] pim [SwitchD-pim] ssm-policy 2000 [SwitchD-pim] quit
# Configure the SSM group range on Switch A, Switch B, and Switch C in the same way Switch D is configured. (Details not shown.)
Configure IGMP SSM mappings on Switch D.
[SwitchD] igmp [SwitchD-igmp] ssm-mapping 133.133.1.1 2000 [SwitchD-igmp] ssm-mapping 133.133.3.1 2000 [SwitchD-igmp] quit
Verifying the configuration
# Display IGMP SSM mappings for multicast group 232.1.1.1 on Switch D.
[SwitchD] display igmp ssm-mapping 232.1.1.1
Group: 232.1.1.1
Source list:
133.133.1.1
133.133.3.1
# On Switch D, display information about IGMP multicast groups that hosts have dynamically joined.
[SwitchD] display igmp group IGMP groups in total: 1 Vlan-interface400(133.133.4.2): IGMP groups reported in total: 1 Group address Last reporter Uptime Expires 232.1.1.1 133.133.4.1 00:02:04 off
# Display PIM routing entries on Switch D.
[SwitchD] display pim routing-table
Total 0 (*, G) entry; 2 (S, G) entry
(133.133.1.1, 232.1.1.1)
RP: 192.168.4.1
Protocol: pim-ssm, Flag:
UpTime: 00:13:25
Upstream interface: Vlan-interface104
Upstream neighbor: 192.168.4.2
RPF prime neighbor: 192.168.4.2
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface400
Protocol: igmp, UpTime: 00:13:25, Expires: -
(133.133.3.1, 232.1.1.1)
RP: 192.168.4.1
Protocol: pim-ssm, Flag:
UpTime: 00:13:25
Upstream interface: Vlan-interface103
Upstream neighbor: 192.168.3.1
RPF prime neighbor: 192.168.3.1
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface400
Protocol: igmp, UpTime: 00:13:25, Expires: -