Configure an IP Multicast Fabric

Tip

If any devices in a fabric are in "admin-down" state, use of the following commands in that same fabric will not add or delete devices in the fabric: efa fabric device add-bulk and efa fabric device remove.

Create a Clos fabric.
```
# efa fabric create –-name clos_fabric --type clos --stage 3
```
Note
Optimized replication is not supported on small data center fabric.

Enable multicast fabric settings.

# efa fabric setting update –-optimized-replication-enable yes –-name clos_fabric

Optional: Override the default MDT group and group range.

# efa fabric setting update –-name clos_fabric –-mdtgroup-range <A.B.C.D/L> –-default-mdtgroup <A.B.C.D>

# efa fabric setting update –-name clos_fabric –-mdtgroup-range 239.0.0.0/8 –-default-mdtgroup 239.1.1.1

Verify the fabric settings.

# efa fabric setting show --name clos_fabric --advanced

+--------------------------------+------------------------+ 
| Optimized Replication Enable   | Yes                    | 
+--------------------------------+------------------------+ 
| MDT Group IPv4 Range           | 238.0.0.0/8            | 
+--------------------------------+------------------------+ 
| Default MDT Group IPv4 address | 238.1.1.1              | 
+--------------------------------+------------------------+

Add devices to the fabric.

# efa fabric device add-bulk --name clos_fabric --leaf Leaf1IP,Leaf2IP,Leaf3IP,Leaf4IP --spine Spine1IP,Spine2IP --username admin --password password

Configure the fabric.

# efa fabric configure –name clos_fabric

Verify the fabric configuration.
```
# efa fabric show-config --name clos_fabric --advanced
```
- All underlay configuration and overlay configurations are pushed to the devices and underlay topology is operational.
- All BGP connections between leaf and spine nodes are established and neighbors are reachable.
- Basic overlay configuration with optimized replication is configured.
- All device configurations are applied to the devices in fabric. For more information, see Device Configuration.

Create a tenant and endpoint group to bring up the multicast tunnels with leaf nodes.

# efa tenant create --name tenant1 --l2-vni-range 10002-14190 --l3-vni-range 14191-14200 --vrf-count 10 --vlan-range 2-4090 --port Leaf1IP[0/12-16],Leaf2IP[0/12-16], Leaf3IP[0/12-16],Leaf4IP[0/12-16] --description Subscriber1

# efa tenant epg create --name epg1 --tenant tenant1 --port Leaf1IP[0/15],Leaf2IP[0/15],Leaf3IP[0/16 --switchport-mode trunk --ctag-range 100