Enable IP Multicast over Fabric Connect Globally

Use this procedure to enable IP Multicast over Fabric Connect globally on the Backbone Edge Bridges (BEBs) that directly or indirectly (using Layer 2 switches) connect to IP multicast senders or receivers. By default, IP Multicast over Fabric Connect is disabled. There is no need to enable IP Multicast over Fabric Connect on the Backbone Core Bridges (BCBs).

You must configure IP Multicast over Fabric Connect at the global level, and then enable it on the service option or options you choose.

Note

IP Multicast over Fabric Connect uses I-SIDs starting at 16,000,000 and above. If Layer 2 or Layer 3 I-SIDs are in this range, the system displays an error message and the switch does not enable IP Multicast over Fabric Connect.

Note

You must enable IP multicast over Fabric Connect globally on all DvR enabled nodes (Controllers and Leaf nodes) in a DvR domain.

Before you begin

You must configure the required SPBM and IS-IS infrastructure, which includes the creation of SPBM B-VLANs.
You must create the customer VLANs (C-VLANs) and add slots/ports.
You must add IST slot/ports to the C-VLAN for an SMLT topology.

Procedure

To enter User EXEC mode, log on to the switch.
Verify no I-SIDs exist in the default reserved range:
1. For Layer 2 use the following command:
  
  show vlan i-sid
2. For Layer 3 use the following command:
  
  show ip ipvpn vrf WORD<1–16>
Enter IS-IS Router Configuration mode:

enable

configure terminal

router isis
Enable IP Multiast over Fabric Connect globally:

spbm <1–100> multicast enable

Note
The switch only supports one SPBM instance.
Optional: Disable IP Multicast over Fabric Connect globally:

no spbm <1–100> multicast enable

default spbm <1–100> multicast enable

Example

Enable IP Multicast over Fabric Connect globally:

Switch:1>show vlan i-sid
===============================================================================
                   Vlan I-SID
===============================================================================
VLAN_ID      I-SID        I-SID NAME        
-------------------------------------------------------------------------------
1                             
10           100          Hospital-Server-10                 
90           1000         ISID-1000        

3 out of 3 Total Num of Vlans displayed
Switch:1>enable
Switch:1#configure terminal
Switch:1(config)#router isis
Switch:1(config-isis)#spbm 1 multicast enable

Variable definitions

The following table defines parameters for the spbm command.


Variable	Value
`<1–100>`	Enables IP Multicast over Fabric Connect globally. The default is disabled. Specifies the SPBM instance. The switch only supports one instance.