Extreme SLX-OS Layer 2 Switching Configuration Guide, 20.2.1a

Enter global configuration mode.

device# configure terminal

Enter the overlay-gateway command, specify the name of a gateway, and enter VXLAN overlay gateway configuration mode.

device(config)# overlay-gateway GW1

Enter the map vlan vni command and specify l2-extension.

device(config-overlay-gw-GW1)# map vlan 5 vni 5000

Enter the map bridge-domain command and specify a bridge domain and VNI.

device(config-overlay-gw-GW1)# map bridge-domain 1 vni 2000

Enter the ip interface command and specify a loopback ID.

device(config-overlay-gw-GW1)# ip interface loopback 1

Enter the activate command to activate the site.

device(config-overlay-gw-GW1)# activate

In global configuration mode, enable EVPN configuration mode and configure the EVPN instance.

Enter default EVPN configuration mode.
```
device(config)# evpn
```
Default mode is the only available mode.
Enable the auto-generation of the import and export route-target community attributes for the default EVPN instance.
```
device(config-evpn-default)# route-target both auto
```
Enable the auto-generation of a route distinguisher (RD) for the default EVPN instance.
```
device(config-evpn-default)# rd auto
```

Add the BDs to the default EVPN instance.

device(config-evpn-default)# bridge-domain add 1-2

Add the VLANs to the default EVPN instance.
```
device(config-evpn-default)# vlan add 11-12
```

Configure BGP routing with neighbor and address-family attributes.

In global configuration mode, enable BGP routing and enter BGP router configuration mode.
```
device(config)# router bgp
```
Specify the autonomous system number (ASN) for the AS in which the remote neighbor resides.
```
device(config-bgp-router)# neighbor 7.7.100.7 remote-as 100
```
Configure the BGP device to communicate with a neighbor through a specified interface, in this case loopback 1.
```
device(config-bgp-router)# neighbor 7.7.100.7 update-source loopback 1
```
Repeat the above two substeps for the other peer address, as in the following example.
```
 neighbor 8.8.100.8 remote-as 100
 neighbor 8.8.100.8 update-source loopback 1
```

Enable IPv4 and IPv6 unicast address-family.

device(config-bgp-router)# address-family ipv4 unicast
device(config-bgp-router)# address-family ipv6 unicast

Enable the L2VPN address-family configuration mode to configure a variety of BGP EVPN options.

Enable L2VPN address-family configuration mode and enter BGP EVPN configuration mode.
```
device(config-bgp-router)# address-family l2vpn evpn
```

Specify VXLAN encapsulation for the first peer.

device(config-bgp-evpn)# neighbor 8.8.100.8 encapsulation vxlan

Enable the exchange of information with BGP neighbors and peer groups.
```
device(config-bgp-evpn)# neighbor 8.8.100.8 activate
  
```

In privileged EXEC mode, enter the show overlay-gateway command to confirm the gateway configuration.

device# show overlay-gateway
Overlay Gateway "GW1", ID 1,
Admin state up
IP address 3.3.3.3 (loopback 1), Vrfdefault-vrf
Number of tunnels 1
Packet count: RX 17909 TX 1247
Byte count : RX (500125) TX 356626

In privileged EXEC mode, enter the show tunnel command to confirm the tunnel configuration.

device# show tunnel 61441
Tunnel 61441, mode VXLAN
Ifindex 0x7c00f001, Admin state up, Operstate up
Source IP 3.3.3.3, Vrf: default-vrf
Destination IP 1.1.1.1
Active next hops on node 1:
IP: 4.4.4.5, Vrf: default-vrf
Egress L3 port: Ve45, Outer SMAC: 609c.9f5a.4415
Outer DMAC: 609c.9f5a.0015, ctag: 0
BUM forwarder: yes

In privileged EXEC mode, enter the show vlan command to confirm the VLAN configuration.

device# show vlan 5
VLAN             Name            State                      Ports           Classification
(R)-RSPAN                                                   (u)-Untagged
                                                            (t)-Tagged
================ =============== ========================== =============== ====================
5                VLAN05          ACTIVE                     Eth 2/1(t)
                                                            Eth 2/5(t)
                                                            tu61441  vni5000

In privileged EXEC mode, enter the show mac-address-table command to confirm the MAC configuration.

device# show mac-address-table
VlanId/BDId    Mac-address       Type      State      Ports/LIF/PW
35 (V)         609c.9f5a.5b15    Dynamic   Active     Po 35
45 (V)         609c.9f5a.4415    Dynamic   Active     Po 45
5 (V)          0000.0400.0011    Dynamic   Active     tu61441
5 (V)          0000.0500.0011    Dynamic   Active     Eth 0/5
5 (V)          0000.0400.0011    Dynamic   Active     tu61441
5 (V)          0000.0500.0011    Dynamic   Active     Eth 0/5
Total MAC addresses : 6
device#

Configuring VXLAN Layer 2 gateway