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Dell EMC SmartFabric OS10 User Guide Release 10.5.2

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Example: VXLAN BGP EVPN — Multiple AS topology with asymmetric IRB

The following VXLAN with BGP EVPN example uses a Clos leaf-spine example. The individual switch configuration shows how to set up an end-to-end VXLAN. eBGP is used to exchange IP routes in the IP underlay network, and EVPN routes in the VXLAN overlay network. All VTEPs perform asymmetric IRB routing, in which:
  • IRB routing is performed only on ingress VTEPs.
  • Egress VTEPs perform IRB bridging.
In this example, each node in the spine network and each VTEP in the leaf network belongs to a different autonomous system. Spine switch 1 is in AS 101. Spine switch 2 is in AS 102. For leaf nodes, VLT domain 1 is in AS 99; VLT domain 2 is in AS 100.
  • On VTEPs 1 and 2: Access ports are assigned to the virtual network using a switch-scoped VLAN. EVPN instance along with RD and RT values are configured in manual mode.
  • On VTEPs 3 and 4: Access ports are assigned to the virtual network using a port-scoped VLAN. EVPN instance along with RD and RT values are configured in manual mode.
NOTE:In multiple AS topology, you can configure route targets in an easier way using the disable-rt-asn command with route-target auto or auto evi commands.
Figure 1. VXLAN BGP EVPN with multiple AS. VXLAN BGP EVPN with multiple AS
VXLAN BGP EVPN use case

VTEP 1 Leaf Switch

1. Configure a Loopback interface for the VXLAN underlay using same IP address as the VLT peer.

OS10(config)# interface loopback0
OS10(conf-if-lo-0)# no shutdown
OS10(conf-if-lo-0)# ip address 192.168.1.1/32
OS10(conf-if-lo-0)# exit

2. Configure the Loopback interface as the VXLAN source tunnel interface.

OS10(config)# nve
OS10(config-nve)# source-interface loopback0
OS10(config-nve)# exit

3. Configure VXLAN virtual networks. 

OS10(config)# virtual-network 10000
OS10(config-vn-10000)# vxlan-vni 10000
OS10(config-vn-vxlan-vni)# exit
OS10(config-vn-10000)# exit
OS10(config)# virtual-network 20000
OS10(config-vn-20000)# vxlan-vni 20000
OS10(config-vn-vxlan-vni)# exit
OS10(config-vn-20000)# exit

4. Assign VLAN member interfaces to the virtual networks.

Use a switch-scoped VLAN-to-VNI mapping: 

OS10(config)# interface vlan100
OS10(config-if-vl-100)# virtual-network 10000
OS10(config-if-vl-100)# no shutdown
OS10(config-if-vl-100)# exit
OS10(config)# interface vlan200
OS10(config-if-vl-200)# virtual-network 20000
OS10(config-if-vl-200)# no shutdown
OS10(config-if-vl-200)# exit

5. Configure access ports as VLAN members for a switch-scoped VLAN-to-VNI mapping.

OS10(config)# interface port-channel10
OS10(conf-if-po-10)# no shutdown
OS10(conf-if-po-10)# switchport mode trunk
OS10(conf-if-po-10)# switchport trunk allowed vlan 100
OS10(conf-if-po-10)# no switchport access vlan
OS10(conf-if-po-10)# exit

OS10(config)# interface ethernet1/1/5
OS10(conf-if-eth1/1/5)# no shutdown
OS10(conf-if-eth1/1/5)# channel-group 10 mode active
OS10(conf-if-eth1/1/5)# no switchport
OS10(conf-if-eth1/1/5)# exit

OS10(config)# interface port-channel20
OS10(conf-if-po-20)# no shutdown
OS10(conf-if-po-20)# switchport mode trunk
OS10(conf-if-po-20)# switchport access vlan 200
OS10(conf-if-po-20)# exit

OS10(config)# interface ethernet1/1/6
OS10(conf-if-eth1/1/6)# no shutdown
OS10(conf-if-eth1/1/6)# channel-group 20 mode active
OS10(conf-if-eth1/1/6)# no switchport
OS10(conf-if-eth1/1/6)# exit

6. Configure upstream network-facing ports.

OS10(config)# interface ethernet1/1/1
OS10(conf-if-eth1/1/1)# no shutdown
OS10(conf-if-eth1/1/1)# no switchport
OS10(conf-if-eth1/1/1)# mtu 1650
OS10(conf-if-eth1/1/1)# ip address 172.16.1.0/31
OS10(conf-if-eth1/1/1)# exit

OS10(config)# interface ethernet1/1/2
OS10(conf-if-eth1/1/2)# no shutdown
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/1)# mtu 1650
OS10(conf-if-eth1/1/2)# ip address 172.16.2.0/31
OS10(conf-if-eth1/1/2)# exit

7. Configure eBGP. 

OS10(config)# router bgp 99
OS10(config-router-bgp-99)# router-id 172.16.0.1
OS10(config-router-bgp-99)# address-family ipv4 unicast
OS10(config-router-bgp-af)# redistribute connected
OS10(config-router-bgp-af)# exit

8. Configure eBGP for the IPv4 point-to-point peering.

OS10(config-router-bgp-99)# neighbor 172.16.1.1
OS10(config-router-neighbor)# remote-as 101
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-99)# neighbor 172.16.2.1
OS10(config-router-neighbor)# remote-as 102
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-99)# exit

9. Configure a Loopback interface for BGP EVPN peering different from the VLT peer IP address.

OS10(config)# interface loopback1 
OS10(conf-if-lo-1)# no shutdown
OS10(conf-if-lo-1)# ip address 172.16.0.1/32 
OS10(conf-if-lo-1)# exit

10. Configure BGP EVPN peering.

OS10(config)# router bgp 99
OS10(config-router-bgp-99)# neighbor 172.201.0.1
OS10(config-router-neighbor)# remote-as 101
OS10(config-router-neighbor)# ebgp-multihop 4
OS10(config-router-neighbor)# send-community extended
OS10(config-router-neighbor)# update-source loopback1
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# address-family ipv4 unicast
OS10(config-router-bgp-neighbor-af)# no activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# address-family l2vpn evpn
OS10(config-router-bgp-neighbor-af)# activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# exit

OS10(config-router-bgp-99)# neighbor 172.202.0.1
OS10(config-router-neighbor)# remote-as 102
OS10(config-router-neighbor)# ebgp-multihop 4
OS10(config-router-neighbor)# send-community extended
OS10(config-router-neighbor)# update-source loopback1
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# address-family ipv4 unicast
OS10(config-router-bgp-neighbor-af)# no activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# address-family l2vpn evpn
OS10(config-router-bgp-neighbor-af)# activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-100)# exit

11. Configure EVPN.

Configure the EVPN instance with RD and RT values in manual mode: 

OS10(config)# evpn
OS10(config-evpn)# evi 10000
OS10(config-evpn-evi-10000)# vni 10000
OS10(config-evpn-evi-10000)# rd 192.168.1.1:10000
OS10(config-evpn-evi-10000)# route-target 99:10000 both
OS10(config-evpn-evi-10000)# route-target 100:10000 import
OS10(config-evpn-evi-10000)#exit

OS10(config-evpn)# evi 20000
OS10(config-evpn-evi-20000)# vni 20000
OS10(config-evpn-evi-20000)# rd 192.168.1.1:20000
OS10(config-evpn-evi-20000)# route-target 99:20000 both
OS10(config-evpn-evi-20000)# route-target 100:20000 import
OS10(config-evpn-evi-20000)#exit
OS10(config-evpn)#

12. Configure VLT.

Configure a dedicated L3 underlay path to reach the VLT Peer in case of a network failure.

OS10(config)# interface vlan4000
OS10(config-if-vl-4000)# no shutdown
OS10(config-if-vl-4000)# ip address 172.16.250.0/31
OS10(config-if-vl-4000)# exit

Configure the VLT port channel.

OS10(config)# interface port-channel10
OS10(conf-if-po-10)# vlt-port-channel 10
OS10(conf-if-po-10)# exit

OS10(config)# interface port-channel20
OS10(conf-if-po-20)# vlt-port-channel 20
OS10(conf-if-po-20)# exit

Configure the VLTi member links.

OOS10(config)# interface ethernet1/1/3
OS10(conf-if-eth1/1/3)# no shutdown
OS10(conf-if-eth1/1/3)# no switchport
OS10(conf-if-eth1/1/3)# exit

OS10(config)# interface ethernet1/1/4
OS10(conf-if-eth1/1/4)# no shutdown
OS10(conf-if-eth1/1/4)# no switchport
OS10(conf-if-eth1/1/4)# exit

Configure the VLT domain.

OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# backup destination 10.16.150.1
OS10(conf-vlt-1)# discovery-interface ethernet1/1/3,1/1/4
OS10(conf-vlt-1)# vlt-mac aa:bb:cc:dd:ee:ff
OS10(conf-vlt-1)# exit

Configure UFD with uplink VLT ports and downlink network ports.

OS10(config)# uplink-state-group 1
OS10(conf-uplink-state-group-1)# enable
OS10(conf-uplink-state-group-1)# downstream ethernet1/1/1-1/1/2
OS10(conf-uplink-state-group-1)# upstream port-channel10
OS10(conf-uplink-state-group-1)# upstream port-channel20
OS10(conf-uplink-state-group-1)# exit

Configure iBGP IPv4 peering between VLT peers.

OS10(config)# router bgp 99
OS10(config-router-bgp-99)# neighbor 172.16.250.1
OS10(config-router-neighbor)# remote-as 99
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-99)# exit

13. Configure IP switching in the overlay network.

Create a tenant VRF

OS10(config)# ip vrf tenant1
OS10(conf-vrf)# exit

Configure an anycast gateway MAC address.

OS10(config)# ip virtual-router mac-address 00:01:01:01:01:01

Configure routing on the virtual networks.

OS10(config)# interface virtual-network10000
OS10(conf-if-vn-10000)# ip vrf forwarding tenant1
OS10(conf-if-vn-10000)# ip address 10.1.0.231/16
OS10(conf-if-vn-10000)# ip virtual-router address 10.1.0.100
OS10(conf-if-vn-10000)# no shutdown
OS10(conf-if-vn-10000)# exit

OS10(config)# interface virtual-network20000
OS10(conf-if-vn-20000)# ip vrf forwarding tenant1
OS10(conf-if-vn-20000)# ip address 10.2.0.231/16
OS10(conf-if-vn-20000)# ip virtual-router address 10.2.0.100
OS10(conf-if-vn-20000)# no shutdown
OS10(conf-if-vn-20000)# exit

VTEP 2 Leaf Switch

1. Configure a Loopback interface for the VXLAN underlay using the same IP address as the VLT peer.

OS10(config)# interface loopback0
OS10(conf-if-lo-0)# no shutdown
OS10(conf-if-lo-0)# ip address 192.168.1.1/32
OS10(conf-if-lo-0)# exit

2. Configure the Loopback interface as the VXLAN source tunnel interface.

OS10(config)# nve
OS10(config-nve)# source-interface loopback0
OS10(config-nve)# exit

3. Configure the VXLAN virtual networks. 

OS10(config)# virtual-network 10000
OS10(config-vn-10000)# vxlan-vni 10000
OS10(config-vn-vxlan-vni)# exit
OS10(config-vn)# exit
OS10(config)# virtual-network 20000
OS10(config-vn-20000)# vxlan-vni 20000
OS10(config-vn-vxlan-vni)# exit
OS10(config-vn-20000)# exit

4. Assign VLAN member interfaces to the virtual networks.

Use a switch-scoped VLAN-to-VNI mapping: 

OS10(config)# interface vlan100
OS10(config-if-vl-100)# virtual-network 10000
OS10(config-if-vl-100)# no shutdown
OS10(config-if-vl-100)# exit
OS10(config)# interface vlan200
OS10(config-if-vl-200)# virtual-network 20000
OS10(config-if-vl-200)# no shutdown
OS10(config-if-vl-200)# exit

5. Configure access ports as VLAN members for a switch-scoped VLAN-to-VNI mapping.

OS10(config)# interface port-channel10
OS10(conf-if-po-10)# no shutdown
OS10(conf-if-po-10)# switchport mode trunk
OS10(conf-if-po-10)# switchport trunk allowed vlan 100
OS10(conf-if-po-10)# no switchport access vlan
OS10(conf-if-po-10)# exit

OS10(config)# interface ethernet1/1/5
OS10(conf-if-eth1/1/5)# no shutdown
OS10(conf-if-eth1/1/5)# channel-group 10 mode active
OS10(conf-if-eth1/1/5)# no switchport
OS10(conf-if-eth1/1/5)# exit

OS10(config)# interface port-channel20
OS10(conf-if-po-20)# no shutdown
OS10(conf-if-po-20)# switchport mode trunk
OS10(conf-if-po-20)# switchport access vlan 200
OS10(conf-if-po-20)# exit

OS10(config)# interface ethernet1/1/6
OS10(conf-if-eth1/1/6)# no shutdown
OS10(conf-if-eth1/1/6)# channel-group 20 mode active
OS10(conf-if-eth1/1/6)# no switchport
OS10(conf-if-eth1/1/6)# exit

6. Configure upstream network-facing ports.

OS10(config)# interface ethernet1/1/1
OS10(conf-if-eth1/1/1)# no shutdown
OS10(conf-if-eth1/1/1)# no switchport
OS10(conf-if-eth1/1/1)# mtu 1650
OS10(conf-if-eth1/1/1)# ip address 172.17.1.0/31
OS10(conf-if-eth1/1/1)# exit

OS10(config)# interface ethernet1/1/2
OS10(conf-if-eth1/1/2)# no shutdown
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/1)# mtu 1650
OS10(conf-if-eth1/1/2)# ip address 172.17.2.0/31
OS10(conf-if-eth1/1/2)# exit

7. Configure eBGP. 

OS10(config)# router bgp 99
OS10(config-router-bgp-99)# router-id 172.17.0.1
OS10(config-router-bgp-99)# address-family ipv4 unicast
OS10(configure-router-bgp-af)# redistribute connected
OS10(configure-router-bgp-af)# exit

8. Configure eBGP for the IPv4 point-to-point peering.

OS10(config-router-bgp-99)# neighbor 172.17.1.1
OS10(config-router-neighbor)# remote-as 101
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit

OS10(config-router-bgp-99)# neighbor 172.17.2.1
OS10(config-router-neighbor)# remote-as 102
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-99)# exit

9. Configure a Loopback interface for BGP EVPN peering different from VLT peer IP address.

OS10(config)# interface loopback1 
OS10(conf-if-lo-1)# no shutdown
OS10(conf-if-lo-1)# ip address 172.17.0.1/32 
OS10(conf-if-lo-1)# exit

10. Configure BGP EVPN peering.

OS10(config)# router bgp 99
OS10(config-router-bgp-99)# neighbor 172.201.0.1
OS10(config-router-neighbor)# remote-as 101
OS10(config-router-neighbor)# ebgp-multihop 4
OS10(config-router-neighbor)# send-community extended
OS10(config-router-neighbor)# update-source loopback1
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# address-family ipv4 unicast
OS10(config-router-bgp-neighbor-af)# no activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# address-family l2vpn evpn
OS10(config-router-bgp-neighbor-af)# activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# exit

OS10(config-router-bgp-99)# neighbor 172.202.0.1
OS10(config-router-neighbor)# remote-as 102
OS10(config-router-neighbor)# ebgp-multihop 4
OS10(config-router-neighbor)# send-community extended
OS10(config-router-neighbor)# update-source loopback1
OS10(config-router-neighbor)# no shutdown
OS10(config-router-bgp-neighbor)# address-family ipv4 unicast
OS10(config-router-bgp-neighbor-af)# no activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# address-family l2vpn evpn
OS10(config-router-bgp-neighbor-af)# activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-99)# exit

11. Configure EVPN.

Configure the EVPN instance with RD and RT in manual configuration mode: 

OS10(config)# evpn
OS10(config-evpn)# evi 10000
OS10(config-evpn-evi-10000)# vni 10000
OS10(config-evpn-evi-10000)# rd 192.168.1.1:10000
OS10(config-evpn-evi-10000)# route-target 99:10000 both
OS10(config-evpn-evi-10000)# route-target 100:10000 import
OS10(config-evpn-evi-10000)#exit

OS10(config-evpn)# evi 20000
OS10(config-evpn-evi-20000)# vni 20000
OS10(config-evpn-evi-20000)# rd 192.168.1.1:20000
OS10(config-evpn-evi-20000)# route-target 99:20000 both
OS10(config-evpn-evi-20000)# route-target 100:20000 import
OS10(config-evpn-evi-20000)#exit
OS10(config-evpn)#

12. Configure VLT.

Configure a dedicated L3 underlay path to reach the VLT Peer in case of a network failure.

OS10(config)# interface vlan4000
OS10(config-if-vl-4000)# no shutdown
OS10(config-if-vl-4000)# ip address 172.16.250.1/31
OS10(config-if-vl-4000)# exit

Configure the VLT port channel.

OS10(config)# interface port-channel10
OS10(conf-if-po-10)# vlt-port-channel 10
OS10(conf-if-po-10)# exit

OS10(config)# interface port-channel20
OS10(conf-if-po-20)# vlt-port-channel 20
OS10(conf-if-po-20)# exit

Configure VLTi member links.

OOS10(config)# interface ethernet1/1/3
OS10(conf-if-eth1/1/3)# no shutdown
OS10(conf-if-eth1/1/3)# no switchport
OS10(conf-if-eth1/1/3)# exit

OS10(config)# interface ethernet1/1/4
OS10(conf-if-eth1/1/4)# no shutdown
OS10(conf-if-eth1/1/4)# no switchport
OS10(conf-if-eth1/1/4)# exit

Configure the VLT domain.

OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# backup destination 10.16.150.2
OS10(conf-vlt-1)# discovery-interface ethernet1/1/3,1/1/4
OS10(conf-vlt-1)# vlt-mac aa:bb:cc:dd:ee:ff
OS10(conf-vlt-1)# exit

Configure UFD with uplink VLT ports and downlink network ports.

OS10(config)# uplink-state-group 1
OS10(conf-uplink-state-group-1)# enable
OS10(conf-uplink-state-group-1)# downstream ethernet1/1/1-1/1/2
OS10(conf-uplink-state-group-1)# upstream port-channel10
OS10(conf-uplink-state-group-1)# upstream port-channel20
OS10(conf-uplink-state-group-1)# exit

Configure iBGP IPv4 peering between VLT peers.

OS10(config)# router bgp 99
OS10(config-router-bgp-99)# neighbor 172.16.250.0
OS10(config-router-neighbor)# remote-as 99
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-99)# exit

13. Configure IP switching in overlay network.

Create a tenant VRF.

OS10(config)# ip vrf tenant1
OS10(conf-vrf)# exit

Configure an anycast gateway MAC address.

OS10(config)# ip virtual-router mac-address 00:01:01:01:01:01

Configure routing on the virtual networks.

OS10(config)# interface virtual-network10000
OS10(conf-if-vn-10000)# ip vrf forwarding tenant1
OS10(conf-if-vn-10000)# ip address 10.1.0.232/16
OS10(conf-if-vn-10000)# ip virtual-router address 10.1.0.100
OS10(conf-if-vn-10000)# no shutdown
OS10(conf-if-vn-10000)# exit

OS10(config)# interface virtual-network20000
OS10(conf-if-vn-20000)# ip vrf forwarding tenant1
OS10(conf-if-vn-20000)# ip address 10.2.0.232/16
OS10(conf-if-vn-20000)# ip virtual-router address 10.2.0.100
OS10(conf-if-vn-20000)# no shutdown
OS10(conf-if-vn-20000)# exit

VTEP 3 Leaf Switch

1. Configure a Loopback interface for the VXLAN underlay using same IP address as the VLT peer.

OS10(config)# interface loopback0
OS10(conf-if-lo-0)# no shutdown
OS10(conf-if-lo-0)# ip address 192.168.2.1/32
OS10(conf-if-lo-0)# exit

2. Configure the Loopback interface as the VXLAN source tunnel interface.

OS10(config)# nve
OS10(config-nve)# source-interface loopback0
OS10(config-nve)# exit

3. Configure VXLAN virtual networks. 

OS10(config)# virtual-network 10000
OS10(config-vn-10000)# vxlan-vni 10000
OS10(config-vn-vxlan-vni)# exit
OS10(config-vn-10000)# exit

OS10(config)# virtual-network 20000
OS10(config-vn-20000)# vxlan-vni 20000
OS10(config-vn-vxlan-vni)# exit
OS10(config-vn-20000)# exit

4. Configure unused VLAN ID for untagged membership. 

OS10(config)# virtual-network untagged-vlan 1000

5. Configure access ports as VLAN members for a port-scoped VLAN-to-VNI mapping.

OS10(config)# interface port-channel10
OS10(conf-if-po-10)# no shutdown
OS10(conf-if-po-10)# switchport mode trunk
OS10(conf-if-po-10)# no switchport access vlan
OS10(conf-if-po-10)# exit

OS10(config)# interface ethernet1/1/5
OS10(conf-if-eth1/1/5)# no shutdown
OS10(conf-if-eth1/1/5)# channel-group 10 mode active
OS10(conf-if-eth1/1/5)# no switchport
OS10(conf-if-eth1/1/5)# exit

OS10(config)# interface port-channel20
OS10(conf-if-po-20)# no shutdown
OS10(conf-if-po-20)# switchport mode trunk
OS10(conf-if-po-20)# no switchport access vlan
OS10(conf-if-po-20)# exit

OS10(config)# interface ethernet1/1/6
OS10(conf-if-eth1/1/6)# no shutdown
OS10(conf-if-eth1/1/6)# channel-group 20 mode active
OS10(conf-if-eth1/1/6)# no switchport
OS10(conf-if-eth1/1/6)# exit

6. Add the access ports to virtual networks.

OS10(config)# virtual-network 10000
OS10(config-vn-10000)# member-interface port-channel 10 vlan-tag 100
OS10(config-vn-10000)# exit

OS10(config)# virtual-network 20000
OS10(config-vn-20000)# member-interface port-channel 20 untagged
OS10(config-vn-20000)# exit

7. Configure upstream network-facing ports.

OS10(config)# interface ethernet1/1/1
OS10(conf-if-eth1/1/1)# no shutdown
OS10(conf-if-eth1/1/1)# no switchport
OS10(conf-if-eth1/1/1)# mtu 1650
OS10(conf-if-eth1/1/1)# ip address 172.18.1.0/31
OS10(conf-if-eth1/1/1)# exit

OS10(config)# interface ethernet1/1/2
OS10(conf-if-eth1/1/2)# no shutdown
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/1)# mtu 1650
OS10(conf-if-eth1/1/2)# ip address 172.18.2.0/31
OS10(conf-if-eth1/1/2)# exit

8. Configure eBGP. 

OS10(config)# router bgp 100
OS10(config-router-bgp-100)# router-id 172.18.0.1
OS10(config-router-bgp-100)# address-family ipv4 unicast
OS10(configure-router-bgp-af)# redistribute connected
OS10(configure-router-bgp-af)# exit

9. Configure eBGP for the IPv4 point-to-point peering.

OS10(config-router-bgp-100)# neighbor 172.18.1.1
OS10(config-router-neighbor)# remote-as 101
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit

OS10(config-router-bgp-100)# neighbor 172.18.2.1
OS10(config-router-neighbor)# remote-as 102
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-100)# exit

10. Configure a Loopback interface for BGP EVPN peering different from VLT peer IP address.

OS10(config)# interface loopback1 
OS10(conf-if-lo-1)# no shutdown
OS10(conf-if-lo-1)# ip address 172.18.0.1/32 
OS10(conf-if-lo-1)# exit

11. Configure BGP EVPN peering.

OS10(config)# router bgp 100
OS10(config-router-bgp-100)# neighbor 172.201.0.1
OS10(config-router-neighbor)# remote-as 101
OS10(config-router-neighbor)# ebgp-multihop 4
OS10(config-router-neighbor)# send-community extended
OS10(config-router-neighbor)# update-source loopback1
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# address-family ipv4 unicast
OS10(config-router-bgp-neighbor-af)# no activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# address-family l2vpn evpn
OS10(config-router-bgp-neighbor-af)# activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# exit

OS10(config-router-bgp-100)# neighbor 172.202.0.1
OS10(config-router-neighbor)# remote-as 102
OS10(config-router-neighbor)# ebgp-multihop 4
OS10(config-router-neighbor)# send-community extended
OS10(config-router-neighbor)# update-source loopback1
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# address-family ipv4 unicast
OS10(config-router-bgp-neighbor-af)# no activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# address-family l2vpn evpn
OS10(config-router-bgp-neighbor-af)# activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-100)# exit

12. Configure EVPN.

Configure the EVPN instance, RD, and RT in manual configuration mode: 

OS10(config)# evpn
OS10(config-evpn)# evi 10000
OS10(config-evpn-evi-10000)# vni 10000
OS10(config-evpn-evi-10000)# rd 192.168.2.1:10000
OS10(config-evpn-evi-10000)# route-target 99:10000 import
OS10(config-evpn-evi-10000)# route-target 100:10000 both
OS10(config-evpn-evi-10000)#exit

OS10(config-evpn)# evi 20000
OS10(config-evpn-evi-20000)# vni 20000
OS10(config-evpn-evi-20000)# rd 192.168.2.1:20000
OS10(config-evpn-evi-20000)# route-target 99:20000 import
OS10(config-evpn-evi-20000)# route-target 100:20000 both
OS10(config-evpn-evi-20000)#exit
OS10(config-evpn)#

13. Configure VLT.

Configure a VLTi VLAN for the virtual network.

OS10(config)# virtual-network 10000
OS10(config-vn-10000)# vlti-vlan 100
OS10(config-vn-10000)# exit

OS10(config)# virtual-network 20000
OS10(config-vn-20000)# vlti-vlan 200
OS10(config-vn-20000)# exit

Configure a dedicated L3 underlay path to reach the VLT Peer in case of a network failure.

OS10(config)# interface vlan4000
OS10(config-if-vl-4000)# no shutdown
OS10(config-if-vl-4000)# ip address 172.16.250.10/31
OS10(config-if-vl-4000)# exit

Configure the VLT port channels.

OS10(config)# interface port-channel10
OS10(conf-if-po-10)# vlt-port-channel 10
OS10(conf-if-po-10)# exit

OS10(config)# interface port-channel20
OS10(conf-if-po-20)# vlt-port-channel 20
OS10(conf-if-po-20)# exit

Configure VLTi member links.

OOS10(config)# interface ethernet1/1/3
OS10(conf-if-eth1/1/3)# no shutdown
OS10(conf-if-eth1/1/3)# no switchport
OS10(conf-if-eth1/1/3)# exit

OS10(config)# interface ethernet1/1/4
OS10(conf-if-eth1/1/4)# no shutdown
OS10(conf-if-eth1/1/4)# no switchport
OS10(conf-if-eth1/1/4)# exit

Configure the VLT domain.

OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# backup destination 10.16.150.3
OS10(conf-vlt-1)# discovery-interface ethernet1/1/3,1/1/4
OS10(conf-vlt-1)# vlt-mac aa:bb:cc:dd:ff:ee
OS10(conf-vlt-1)# exit

Configure UFD with uplink VLT ports and downlink network ports.

OS10(config)# uplink-state-group 1
OS10(conf-uplink-state-group-1)# enable
OS10(conf-uplink-state-group-1)# downstream ethernet1/1/1-1/1/2
OS10(conf-uplink-state-group-1)# upstream port-channel10
OS10(conf-uplink-state-group-1)# upstream port-channel20
OS10(conf-uplink-state-group-1)# exit

Configure iBGP IPv4 peering between VLT peers.

OS10(config)# router bgp 100
OS10(config-router-bgp-100)# neighbor 172.16.250.11
OS10(config-router-neighbor)# remote-as 100
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-100)# exit

14. Configure IP routing in the overlay network.

Create the tenant VRF.

OS10(config)# ip vrf tenant1
OS10(conf-vrf)# exit

Configure an anycast gateway MAC address.

OS10(config)# ip virtual-router mac-address 00:01:01:01:01:01

Configure routing on the virtual networks.

OS10(config)# interface virtual-network10000
OS10(conf-if-vn-10000)# ip vrf forwarding tenant1
OS10(conf-if-vn-10000)# ip address 10.1.0.233/16
OS10(conf-if-vn-10000)# ip virtual-router address 10.1.0.100
OS10(conf-if-vn-10000)# no shutdown
OS10(conf-if-vn-10000)# exit

OS10(config)# interface virtual-network20000
OS10(conf-if-vn-20000)# ip vrf forwarding tenant1
OS10(conf-if-vn-20000)# ip address 10.2.0.233/16
OS10(conf-if-vn-20000)# ip virtual-router address 10.2.0.100
OS10(conf-if-vn-20000)# no shutdown
OS10(conf-if-vn-20000)# exit

VTEP 4 Leaf Switch

1. Configure a Loopback interface for the VXLAN underlay using same IP address as the VLT peer.

OS10(config)# interface loopback0
OS10(conf-if-lo-0)# no shutdown
OS10(conf-if-lo-0)# ip address 192.168.2.1/32
OS10(conf-if-lo-0)# exit

2. Configure the Loopback interface as the VXLAN source tunnel interface.

OS10(config)# nve
OS10(config-nve)# source-interface loopback0
OS10(config-nve)# exit

3. Configure the VXLAN virtual networks. 

OS10(config)# virtual-network 10000
OS10(config-vn-10000)# vxlan-vni 10000
OS10(config-vn-vxlan-vni)# exit
OS10(config-vn-10000)# exit

OS10(config)# virtual-network 20000
OS10(config-vn-20000)# vxlan-vni 20000
OS10(config-vn-vxlan-vni)# exit
OS10(config-vn-20000)# exit

4. Configure the unused VLAN ID for untagged membership.

OS10(config)# virtual-network untagged-vlan 1000

5. Configure access ports as VLAN members for a port-scoped VLAN-to-VNI mapping.

OS10(config)# interface port-channel10
OS10(conf-if-po-10)# no shutdown
OS10(conf-if-po-10)# switchport mode trunk
OS10(conf-if-po-10)# no switchport access vlan
OS10(conf-if-po-10)# exit

OS10(config)# interface ethernet1/1/5
OS10(conf-if-eth1/1/5)# no shutdown
OS10(conf-if-eth1/1/5)# channel-group 10 mode active
OS10(conf-if-eth1/1/5)# no switchport
OS10(conf-if-eth1/1/5)# exit

OS10(config)# interface port-channel20
OS10(conf-if-po-20)# no shutdown
OS10(conf-if-po-20)# switchport mode trunk
OS10(conf-if-po-20)# no switchport access vlan
OS10(conf-if-po-20)# exit

OS10(config)# interface ethernet1/1/6
OS10(conf-if-eth1/1/6)# no shutdown
OS10(conf-if-eth1/1/6)# channel-group 20 mode active
OS10(conf-if-eth1/1/6)# no switchport
OS10(conf-if-eth1/1/6)# exit

6. Add the access ports to the virtual networks.

OS10(config)# virtual-network 10000
OS10(config-vn-10000)# member-interface port-channel 10 vlan-tag 100
OS10(config-vn)# exit

OS10(config)# virtual-network 20000
OS10(config-vn-20000)# member-interface port-channel 20 untagged
OS10(config-vn)# exit

7. Configure upstream network-facing ports.

OS10(config)# interface ethernet1/1/1
OS10(conf-if-eth1/1/1)# no shutdown
OS10(conf-if-eth1/1/1)# no switchport
OS10(conf-if-eth1/1/1)# mtu 1650
OS10(conf-if-eth1/1/1)# ip address 172.19.1.0/31
OS10(conf-if-eth1/1/1)# exit

OS10(config)# interface ethernet1/1/2
OS10(conf-if-eth1/1/2)# no shutdown
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/2)# mtu 1650
OS10(conf-if-eth1/1/2)# ip address 172.19.2.0/31
OS10(conf-if-eth1/1/2)# exit

8. Configure eBGP. 

OS10(config)# router bgp 100
OS10(config-router-bgp-100)# router-id 172.19.0.1
OS10(config-router-bgp-100)# address-family ipv4 unicast
OS10(configure-router-bgp-af)# redistribute connected
OS10(configure-router-bgp-af)# exit

9. Configure eBGP for the IPv4 point-to-point peering.

OS10(config-router-bgp-100)# neighbor 172.19.1.1
OS10(config-router-neighbor)# remote-as 101
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit

OS10(config-router-bgp-100)# neighbor 172.19.2.1
OS10(config-router-neighbor)# remote-as 102
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-100)# exit

10. Configure a Loopback interface for BGP EVPN peering different from the VLT peer IP address.

OS10(config)# interface loopback1 
OS10(conf-if-lo-1)# no shutdown
OS10(conf-if-lo-1)# ip address 172.19.0.1/32 
OS10(conf-if-lo-1)# exit

11. Configure BGP EVPN peering.

OS10(config)# router bgp 100
OS10(config-router-bgp-100)# neighbor 172.201.0.1
OS10(config-router-neighbor)# remote-as 101
OS10(config-router-neighbor)# ebgp-multihop 4
OS10(config-router-neighbor)# send-community extended
OS10(config-router-neighbor)# update-source loopback1
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# address-family ipv4 unicast
OS10(config-router-bgp-neighbor-af)# no activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# address-family l2vpn evpn
OS10(config-router-bgp-neighbor-af)# activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# exit

OS10(config-router-bgp-100)# neighbor 172.202.0.1
OS10(config-router-neighbor)# remote-as 102
OS10(config-router-neighbor)# ebgp-multihop 4
OS10(config-router-neighbor)# send-community extended
OS10(config-router-neighbor)# update-source loopback1
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# address-family ipv4 unicast
OS10(config-router-bgp-neighbor-af)# no activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# address-family l2vpn evpn
OS10(config-router-bgp-neighbor-af)# activate
OS10(config-router-bgp-neighbor-af)# exit
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-100)# exit

12. Configure EVPN.

Configure the EVPN instance,RD, RT in manual configuration mode: 

OS10(config)# evpn
OS10(config-evpn)# evi 10000
OS10(config-evpn-evi-10000)# vni 10000
OS10(config-evpn-evi-10000)# rd 192.168.2.1:10000
OS10(config-evpn-evi-10000)# route-target 99:10000 import
OS10(config-evpn-evi-10000)# route-target 100:10000 both
OS10(config-evpn-evi-10000)#exit

OS10(config-evpn)# evi 20000
OS10(config-evpn-evi-20000)# vni 20000
OS10(config-evpn-evi-20000)# rd 192.168.2.1:20000
OS10(config-evpn-evi-20000)# route-target 99:20000 import
OS10(config-evpn-evi-20000)# route-target 100:20000 both
OS10(config-evpn-evi-20000)#exit
OS10(config-evpn)#

13. Configure VLT.

Configure a VLTi VLAN for the virtual network.

OS10(config)# virtual-network 10000
OS10(config-vn-10000)# vlti-vlan 100
OS10(config-vn-10000)# exit

OS10(config)# virtual-network 20000
OS10(conf-vn-20000)# vlti-vlan 200
OS10(conf-vn-20000)# exit

Configure a dedicated L3 underlay path to reach the VLT Peer in case of a network failure.

OS10(config)# interface vlan4000
OS10(config-if-vl-4000)# no shutdown
OS10(config-if-vl-4000)# ip address 172.16.250.11/31
OS10(config-if-vl-4000)# exit

Configure VLT port channels.

OS10(config)# interface port-channel10
OS10(conf-if-po-10)# vlt-port-channel 10
OS10(conf-if-po-10)# exit

OS10(config)# interface port-channel20
OS10(conf-if-po-20)# vlt-port-channel 20
OS10(conf-if-po-20)# exit

Configure VLTi member links.

OOS10(config)# interface ethernet1/1/3
OS10(conf-if-eth1/1/3)# no shutdown
OS10(conf-if-eth1/1/3)# no switchport
OS10(conf-if-eth1/1/3)# exit

OS10(config)# interface ethernet1/1/4
OS10(conf-if-eth1/1/4)# no shutdown
OS10(conf-if-eth1/1/4)# no switchport
OS10(conf-if-eth1/1/4)# exit

Configure the VLT domain.

OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# backup destination 10.16.150.4
OS10(conf-vlt-1)# discovery-interface ethernet1/1/3,1/1/4
OS10(conf-vlt-1)# vlt-mac aa:bb:cc:dd:ff:ee
OS10(conf-vlt-1)# exit

Configure UFD with uplink VLT ports and downlink network ports.

OS10(config)# uplink-state-group 1
OS10(conf-uplink-state-group-1)# enable
OS10(conf-uplink-state-group-1)# downstream ethernet1/1/1-1/1/2
OS10(conf-uplink-state-group-1)# upstream port-channel10
OS10(conf-uplink-state-group-1)# upstream port-channel20
OS10(conf-uplink-state-group-1)# exit

Configure iBGP IPv4 peering between the VLT peers.

OS10(config)# router bgp 100
OS10(config-router-bgp-100)# neighbor 172.16.250.10
OS10(config-router-neighbor)# remote-as 100
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-100)# exit

14. Configure IP routing in the overlay network.

Create a tenant VRF.

OS10(config)# ip vrf tenant1
OS10(conf-vrf)# exit

Configure an anycast gateway MAC address.

OS10(config)# ip virtual-router mac-address 00:01:01:01:01:01

Configure routing on the virtual networks.

OS10(config)# interface virtual-network10000
OS10(conf-if-vn-10000)# ip vrf forwarding tenant1
OS10(conf-if-vn-10000)# ip address 10.1.0.234/16
OS10(conf-if-vn-10000)# ip virtual-router address 10.1.0.100
OS10(conf-if-vn-10000)# no shutdown
OS10(conf-if-vn-10000)# exit

OS10(config)# interface virtual-network20000
OS10(conf-if-vn-20000)# ip vrf forwarding tenant1
OS10(conf-if-vn-20000)# ip address 10.2.0.234/16
OS10(conf-if-vn-20000)# ip virtual-router address 10.2.0.100
OS10(conf-if-vn-20000)# no shutdown
OS10(conf-if-vn-20000)# exit

Spine Switch 1

1. Configure downstream ports on underlay links to the leaf switches. 

OS10(config)# interface ethernet1/1/1
OS10(conf-if-eth1/1/1)# no shutdown
OS10(conf-if-eth1/1/1)# no switchport
OS10(conf-if-eth1/1/1)# ip address 172.16.1.1/31
OS10(conf-if-eth1/1/1)# exit
OS10(config)# interface ethernet1/1/2
OS10(conf-if-eth1/1/2)# no shutdown
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/2)# ip address 172.17.1.1/31
OS10(conf-if-eth1/1/2)# exit
OS10(config)# interface ethernet1/1/3
OS10(conf-if-eth1/1/3)# no shutdown
OS10(conf-if-eth1/1/3)# no switchport
OS10(conf-if-eth1/1/3)# ip address 172.18.1.1/31
OS10(conf-if-eth1/1/3)# exit
OS10(config)# interface ethernet1/1/4
OS10(conf-if-eth1/1/4)# no shutdown
OS10(conf-if-eth1/1/4)# no switchport
OS10(conf-if-eth1/1/4)# ip address 172.19.1.1/31
OS10(conf-if-eth1/1/4)# exit

2. Configure eBGP. 

OS10(config)# router bgp 101
OS10(config-router-bgp-101)# router-id 172.201.0.1
OS10(config-router-bgp-101)# address-family ipv4 unicast
OS10(configure-router-bgpv4-af)# redistribute connected
OS10(configure-router-bgpv4-af)# exit

3. Configure eBGP IPv4 peer sessions on the P2P links. 

OS10(conf-router-bgp-101)# neighbor 172.16.1.0
OS10(conf-router-neighbor)# remote-as 99
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# exit

OS10(conf-router-bgp-101)# neighbor 172.17.1.0
OS10(conf-router-neighbor)# remote-as 99
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# exit

OS10(conf-router-bgp-101)# neighbor 172.18.1.0
OS10(conf-router-neighbor)# remote-as 100
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# exit

OS10(conf-router-bgp-101)# neighbor 172.19.1.0
OS10(conf-router-neighbor)# remote-as 100
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# exit
OS10(conf-router-bgp-101)# exit

4. Configure a Loopback interface for BGP EVPN peering.

OS10(config)# interface loopback1
OS10(conf-if-lo-1)# no shutdown
OS10(conf-if-lo-1)# ip address 172.201.0.1/32
OS10(conf-if-lo-1)# exit

5. Configure BGP EVPN peer sessions. 

OS10(config)# router bgp 101
OS10(conf-router-bgp-101)# neighbor 172.16.0.1
OS10(conf-router-neighbor)# ebgp-multihop 4
OS10(conf-router-neighbor)# remote-as 99
OS10(conf-router-neighbor)# send-community extended
OS10(conf-router-neighbor)# update-source loopback1
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-neighbor-af)# no activate
OS10(conf-router-neighbor-af)# exit
OS10(conf-router-neighbor)# address-family l2vpn evpn
OS10(conf-router-neighbor-af)# activate
OS10(conf-router-neighbor-af)# exit

OS10(conf-router-bgp-101)# neighbor 172.17.0.1
OS10(conf-router-neighbor)# ebgp-multihop 4
OS10(conf-router-neighbor)# remote-as 99
OS10(conf-router-neighbor)# send-community extended
OS10(conf-router-neighbor)# update-source loopback1
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-neighbor-af)# no activate
OS10(conf-router-neighbor-af)# exit
OS10(conf-router-neighbor)# address-family l2vpn evpn
OS10(conf-router-neighbor-af)# activate
OS10(conf-router-neighbor-af)# exit

OS10(conf-router-bgp-101)# neighbor 172.18.0.1
OS10(conf-router-neighbor)# ebgp-multihop 4
OS10(conf-router-neighbor)# remote-as 100
OS10(conf-router-neighbor)# send-community extended
OS10(conf-router-neighbor)# update-source loopback1
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-neighbor-af)# no activate
OS10(conf-router-neighbor-af)# exit
OS10(conf-router-neighbor)# address-family l2vpn evpn
OS10(conf-router-neighbor-af)# activate
OS10(conf-router-neighbor-af)# exit

OS10(conf-router-bgp-101)# neighbor 172.19.0.1
OS10(conf-router-neighbor)# ebgp-multihop 4
OS10(conf-router-neighbor)# remote-as 100
OS10(conf-router-neighbor)# send-community extended
OS10(conf-router-neighbor)# update-source loopback1
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-neighbor-af)# no activate
OS10(conf-router-neighbor-af)# exit
OS10(conf-router-neighbor)# address-family l2vpn evpn
OS10(conf-router-neighbor-af)# activate
OS10(conf-router-neighbor-af)# exit

Spine Switch 2

1. Configure downstream ports on the underlay links to the leaf switches. 

OS10(config)# interface ethernet1/1/1
OS10(conf-if-eth1/1/1)# no shutdown
OS10(conf-if-eth1/1/1)# no switchport
OS10(conf-if-eth1/1/1)# ip address 172.16.2.1/31
OS10(conf-if-eth1/1/1)# exit
OS10(config)# interface ethernet1/1/2
OS10(conf-if-eth1/1/2)# no shutdown
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/2)# ip address 172.17.2.1/31
OS10(conf-if-eth1/1/2)# exit
OS10(config)# interface ethernet1/1/3
OS10(conf-if-eth1/1/3)# no shutdown
OS10(conf-if-eth1/1/3)# no switchport
OS10(conf-if-eth1/1/3)# ip address 172.18.2.1/31
OS10(conf-if-eth1/1/3)# exit
OS10(config)# interface ethernet1/1/4
OS10(conf-if-eth1/1/4)# no shutdown
OS10(conf-if-eth1/1/4)# no switchport
OS10(conf-if-eth1/1/4)# ip address 172.19.2.1/31
OS10(conf-if-eth1/1/4)# exit

2. Configure eBGP. 

OS10(config)# router bgp 102
OS10(config-router-bgp-102)# router-id 172.202.0.1
OS10(config-router-bgp-102)# address-family ipv4 unicast
OS10(configure-router-bgpv4-af)# redistribute connected
OS10(configure-router-bgpv4-af)# exit

3. Configure eBGP IPv4 peer sessions on the P2P links. 

OS10(conf-router-bgp-102)# neighbor 172.16.2.0
OS10(conf-router-neighbor)# remote-as 99
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# exit

OS10(conf-router-bgp-102)# neighbor 172.17.2.0
OS10(conf-router-neighbor)# remote-as 99
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# exit

OS10(conf-router-bgp-102)# neighbor 172.18.2.0
OS10(conf-router-neighbor)# remote-as 100
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# exit

OS10(conf-router-bgp-102)# neighbor 172.19.2.0
OS10(conf-router-neighbor)# remote-as 100
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# exit
OS10(conf-router-bgp-102)# exit

4. Configure a Loopback interface for BGP EVPN peering.

OS10(config)# interface loopback1
OS10(conf-if-lo-1)# no shutdown
OS10(conf-if-lo-1)# ip address 172.202.0.1/32
OS10(conf-if-lo-1)# exit

5. Configure BGP EVPN peer sessions.

OS10(config)# router bgp 102
OS10(conf-router-bgp-102)# neighbor 172.16.0.1
OS10(conf-router-neighbor)# ebgp-multihop 4
OS10(conf-router-neighbor)# remote-as 99
OS10(conf-router-neighbor)# send-community extended
OS10(conf-router-neighbor)# update-source loopback1
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-neighbor-af)# no activate
OS10(conf-router-neighbor-af)# exit
OS10(conf-router-neighbor)# address-family l2vpn evpn
OS10(conf-router-neighbor-af)# activate
OS10(conf-router-neighbor-af)# exit

OS10(conf-router-bgp-102)# neighbor 172.17.0.1
OS10(conf-router-neighbor)# ebgp-multihop 4
OS10(conf-router-neighbor)# remote-as 99
OS10(conf-router-neighbor)# send-community extended
OS10(conf-router-neighbor)# update-source loopback1
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-neighbor-af)# no activate
OS10(conf-router-neighbor-af)# exit
OS10(conf-router-neighbor)# address-family l2vpn evpn
OS10(conf-router-neighbor-af)# activate
OS10(conf-router-neighbor-af)# exit

OS10(conf-router-bgp-102)# neighbor 172.18.0.1
OS10(conf-router-neighbor)# ebgp-multihop 4
OS10(conf-router-neighbor)# remote-as 100
OS10(conf-router-neighbor)# send-community extended
OS10(conf-router-neighbor)# update-source loopback1
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-neighbor-af)# no activate
OS10(conf-router-neighbor-af)# exit
OS10(conf-router-neighbor)# address-family l2vpn evpn
OS10(conf-router-neighbor-af)# activate
OS10(conf-router-neighbor-af)# exit

OS10(conf-router-bgp-102)# neighbor 172.19.0.1
OS10(conf-router-neighbor)# ebgp-multihop 4
OS10(conf-router-neighbor)# remote-as 100
OS10(conf-router-neighbor)# send-community extended
OS10(conf-router-neighbor)# update-source loopback1
OS10(conf-router-neighbor)# no shutdown
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-neighbor-af)# no activate
OS10(conf-router-neighbor-af)# exit
OS10(conf-router-neighbor)# address-family l2vpn evpn
OS10(conf-router-neighbor-af)# activate
OS10(conf-router-neighbor-af)# exit

Verify VXLAN with BGP EVPN — Multiple AS topology.

1. Verify virtual network configurations. 

LEAF1# show virtual-network 
Codes: DP - MAC-learn Dataplane, CP - MAC-learn Controlplane, UUD - Unknown-Unicast-Drop 
Virtual Network: 10000 
   Members: 
      VLAN 100: port-channel10, port-channel1000 
   VxLAN Virtual Network Identifier: 10000 
      Source Interface: loopback0(192.168.1.1) 
      Remote-VTEPs (flood-list): 192.168.2.1(CP) 

Virtual Network: 20000 
   Members: 
      Untagged: port-channel20 
   VLAN 200: port-channel1000 
      VxLAN Virtual Network Identifier: 20000 
      Source Interface: loopback0(192.168.1.1) 
      Remote-VTEPs (flood-list): 192.168.2.1(CP) 
LEAF1#

2. Verify EVPN configurations and EVPN parameters. 

LEAF1# show evpn evi 

EVI : 10000, State : up 
  Bridge-Domain       : Virtual-Network 10000, VNI 10000 
  Route-Distinguisher : 1:192.168.1.1:10000 
  Route-Targets       : 0:99:10000 both, 0:100:10000 import 
  Inclusive Multicast : 192.168.2.1 
  IRB                 : Enabled(tenant1) 

EVI : 20000, State : up 
  Bridge-Domain       : Virtual-Network 20000, VNI 20000 
  Route-Distinguisher : 1:192.168.1.1:20000 
  Route-Targets       : 0:99:10000 both, 0:100:10000 import 
  Inclusive Multicast : 192.168.2.1 
  IRB                 : Enabled(tenant1) 
LEAF1#

3. Verify BGP EVPN neighborship between leaf and spine nodes. 

LEAF1# show ip bgp l2vpn evpn summary 
BGP router identifier 172.16.0.1 local AS number 99 
Neighbor     AS   MsgRcvd  MsgSent  Up/Down   State/Pfx 
172.201.0.1  101  1132     1116     13:29:00  27 
172.202.0.1  102  1131     1118     13:29:02  28 
LEAF1#

4. Check connectivity between host A and host B. 

root@HOST-A:~# ping 10.2.0.10 -c 5 
PING 10.2.0.10 (10.2.0.10) 56(84) bytes of data. 
64 bytes from 10.2.0.10: icmp_seq=1 ttl=63 time=0.824 ms 
64 bytes from 10.2.0.10: icmp_seq=2 ttl=63 time=0.847 ms 
64 bytes from 10.2.0.10: icmp_seq=3 ttl=63 time=0.835 ms 
64 bytes from 10.2.0.10: icmp_seq=4 ttl=63 time=0.944 ms 
64 bytes from 10.2.0.10: icmp_seq=5 ttl=63 time=0.806 ms 

--- 10.2.0.10 ping statistics --- 
5 packets transmitted, 5 received, 0% packet loss, time 4078ms 
rtt min/avg/max/mdev = 0.806/0.851/0.944/0.051 ms 
root@HOST-A:~#

5. Check connectivity between host A and host C. 

root@HOST-A:~# ping 10.1.0.20 -c 5 
PING 10.1.0.20 (10.1.0.20) 56(84) bytes of data. 
64 bytes from 10.1.0.20: icmp_seq=1 ttl=64 time=0.741 ms 
64 bytes from 10.1.0.20: icmp_seq=2 ttl=64 time=0.737 ms 
64 bytes from 10.1.0.20: icmp_seq=3 ttl=64 time=0.772 ms 
64 bytes from 10.1.0.20: icmp_seq=4 ttl=64 time=0.799 ms 
64 bytes from 10.1.0.20: icmp_seq=5 ttl=64 time=0.866 ms 

--- 10.1.0.20 ping statistics --- 
5 packets transmitted, 5 received, 0% packet loss, time 4061ms 
rtt min/avg/max/mdev = 0.737/0.783/0.866/0.047 ms 
root@HOST-A:~#

6. Check connectivity between host A and host D. 

root@HOST-A:~# ping 10.2.0.20 -c 5 
PING 10.2.0.20 (10.2.0.20) 56(84) bytes of data. 
64 bytes from 10.2.0.20: icmp_seq=1 ttl=63 time=0.707 ms 
64 bytes from 10.2.0.20: icmp_seq=2 ttl=63 time=0.671 ms 
64 bytes from 10.2.0.20: icmp_seq=3 ttl=63 time=0.687 ms 
64 bytes from 10.2.0.20: icmp_seq=4 ttl=63 time=0.640 ms 
64 bytes from 10.2.0.20: icmp_seq=5 ttl=63 time=0.644 ms 

--- 10.2.0.20 ping statistics --- 
5 packets transmitted, 5 received, 0% packet loss, time 4089ms 
rtt min/avg/max/mdev = 0.640/0.669/0.707/0.041 ms 
root@HOST-A:~#
NOTE:Follow Steps 1 to 6 to check ping connectivity between combinations of other hosts, and between hosts through different virtual-network IP addresses.

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