Use this procedure to configure IP Multicast over Fabric Connect within the GRT. The default is disabled.
Note
You do not have to enable IP Shortcuts to support IP multicast routing in the GRT using SPBM.
You cannot enable IP PIM when IP Multicast over Fabric Connect is enabled on the VLAN.
You must configure the required SPBM and IS-IS infrastructure, which includes the creation of SPBM B-VLANs.
You must create the C-VLANs and add slots/ports.
You must enable IP Multicast over Fabric Connect globally.
If no IP interface exists on the VLAN, then you create one. (The IP interface must be the same subnet as the IGMP hosts that connect to the VLAN).
With IP Multicast over Fabric Connect within the GRT, routing of IP multicast traffic is allowed within the subset of VLANs in the GRT that have IP Multicast over Fabric Connect enabled. When you enable IP Multicast over Fabric Connect on a VLAN, the VLAN automatically becomes a multicast routing interface.
You must configure ip spb-multicast enable on each of the VLANs within the GRT that need to support IP multicast traffic. The default is disabled. After you enable IP Multicast over Fabric Connect on each of the VLANs within the GRT that need to support IP multicast traffic, any IGMP functions required for IP Multicast over Fabric Connect within the GRT are automatically enabled. You do not need to configure anything IGMP related.
If you only want to use IP Multicast over Fabric Connect, you do not need to enable the Layer 3 VSN or redistribute unicast routes into or out of IS-IS. IP Multicast over Fabric Connect routing does not depend on unicast routing, which allows for you to more easily migrate from a PIM environment to IP Multicast over Fabric Connect. You can migrate a PIM environment to IP Multicast over Fabric Connect first and then migrate unicast separately or not at all.
The switch only supports IPv4 addresses with IP Multicast over Fabric Connect.
enable
configure terminal
interface GigabitEthernet {slot/port[/sub-port][-slot/port[/sub-port]][,...]} or interface vlan <1–4059>
Note
If the platform supports channelization and the port is channelized, you must also specify the sub-port in the format slot/port/sub-port.
ip spb-multicast enable
Note
After you configure ip spb-multicast enable, you cannot enable IGMP, IGMP Snooping, or IGMP proxy on the interface. If you try to enable IGMP Snooping or proxy on any interface where IP Multicast over Fabric Connect is enabled, an error message displays.
Note
When you configure ip spb-multicast enable on the Controller node of a DvR domain, the configuration is automatically pushed to the Leaf nodes within the domain.
Enable IP Multicast over Fabric Connect within the GRT:
Switch:1>enable Switch:1#configure terminal Switch:1(config)#interface vlan 500 Switch:1(config-if)#ip address 192.0.2.1 255.255.255.0 Switch:1(config-if)#ip spb-multicast enable
Switch:1#show ip igmp interface
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Igmp Interface - GlobalRouter
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QUERY OPER QUERY WRONG LASTMEM
IF INTVL STATUS VERS. VERS QUERIER MAXRSPT QUERY JOINS ROBUST QUERY MODE L2ISID SCOPE
ISID
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V500 125 active 2 2 0.0.0.0 100 0 0 2 10 routed-spb
V2000 125 inact 2 2 0.0.0.0 100 0 0 2 10
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