Configuring VxLAN Layer 2 Gateway support for bridge domains

Before performing this configuration, configure a point-to-multipoint bridge domain.

Follow these steps configure a VxLAN Layer 2 gateway to support bridge domains.

Enter global configuration mode.
```
device# configure terminal
```
Create a VxLAN overlay gateway and access the overlay gateway configuration mode.
```
device(config)# overlay-gateway gateway1
device(config-overlay-gw-gateway1)#
```

Specify a loopback interface.

device(config-overlay-gw-gateway1)# ip interface loopback 1

Enable the mapping of a bridge domain to a VNI.

device(config-overlay-gw-gateway1)# map bridge-domain 1 vni 999

Activate the gateway.

device(config-overlay-gateway-gateway1)# activate

The following summarizes the configuration example.

device# configure terminal 
device(config)# overlay-gateway gateway1
device(config-overlay-gw-gateway1)# ip interface loopback 1 
device(config-overlay-gw-gateway1)# map bridge-domain 1 vni 999 
device(config-overlay-gw-gateway1)# site bd1 
device(config-overlay-gateway-gateway1)# activate