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In this video, I have demonstrated how VXLAN bridging works with BGP EVPN. A detailed step by step demo on Arista switches.
If you want the pdf of the slides shown in this video, email me at ccie.ots@gmail.com
For VXLAN Bridging packet walk, watch this video:
• VLAN Switching vs VXLA...
12:16 Configuration Steps
16:23 Configuration on the CLI
===Configurations used in this video===
===spine1===
!Underlay
ip routing
router ospf 1
interface Loopback0
ip address 172.16.0.3/32
ip ospf area 0.0.0.0
interface Ethernet1
no switchport
ip address 172.16.255.0/31
ip ospf area 0.0.0.0
no shutdown
interface Ethernet3
no switchport
ip address 172.16.255.2/31
ip ospf area 0.0.0.0
no shutdown
!Overlay
router bgp 65000
router-id 172.16.0.3
no bgp default ipv4-unicast
neighbor 172.16.0.1 remote-as 65000
neighbor 172.16.0.1 update-source Loopback0
neighbor 172.16.0.1 description cleaf1
neighbor 172.16.0.1 route-reflector-client
neighbor 172.16.0.1 send-community
neighbor 172.16.0.2 remote-as 65000
neighbor 172.16.0.2 update-source Loopback0
neighbor 172.16.0.2 description bleaf1
neighbor 172.16.0.2 route-reflector-client
neighbor 172.16.0.2 send-community
address-family evpn
neighbor 172.16.0.1 activate
neighbor 172.16.0.2 activate
===cleaf1===
!Underlay
ip routing
router ospf 1
interface Loopback0
ip address 172.16.0.1/32
ip ospf area 0.0.0.0
interface Ethernet1
no switchport
ip address 172.16.255.1/31
ip ospf area 0.0.0.0
no shutdown
!Overlay
router bgp 65000
router-id 172.16.0.1
no bgp default ipv4-unicast
neighbor 172.16.0.3 remote-as 65000
neighbor 172.16.0.3 update-source Loopback0
neighbor 172.16.0.3 description spine1
neighbor 172.16.0.3 send-community
address-family evpn
neighbor 172.16.0.3 activate
interface Vxlan1
vxlan source-interface Loopback0
!Layer2 VPN - vlan10
router bgp 65000
vlan 10
rd 172.16.0.1:10000
route-target both 10000:10000
redistribute learned
interface Vxlan1
vxlan vlan 10 vni 10000
vlan 10
interface Ethernet5
switchport trunk allowed vlan 10
switchport mode trunk
no shutdown
===bleaf1===
!Underlay
ip routing
router ospf 1
interface Loopback0
ip address 172.16.0.2/32
ip ospf area 0.0.0.0
interface Ethernet1
no switchport
ip address 172.16.255.3/31
ip ospf area 0.0.0.0
no shutdown
!Overlay
router bgp 65000
router-id 172.16.0.2
no bgp default ipv4-unicast
neighbor 172.16.0.3 remote-as 65000
neighbor 172.16.0.3 update-source Loopback0
neighbor 172.16.0.3 description spine1
neighbor 172.16.0.3 send-community
address-family evpn
neighbor 172.16.0.3 activate
interface Vxlan1
vxlan source-interface Loopback0
!Layer2 VPN - vlan10
router bgp 65000
vlan 10
rd 172.16.0.2:10000
route-target both 10000:10000
redistribute learned
interface Vxlan1
vxlan vlan 10 vni 10000
vlan 10
interface Ethernet5
switchport trunk allowed vlan 10
switchport mode trunk
no shutdown
===server1===
!Layer2 VPN - vlan10
vlan 10
interface vlan10
ip address 172.16.10.1/24
interface Ethernet1
switchport trunk allowed vlan 10
switchport mode trunk
no shutdown
===server2===
!Layer2 VPN - vlan10
vlan 10
interface vlan10
ip address 172.16.10.2/24
interface Ethernet1
switchport trunk allowed vlan 10
switchport mode trunk
no shutdown
===Verification Commands===
Step 1 (Underlay):
show ip ospf neighbor
show ip route
Step 2 (Overlay):
Step 2a(Control plane):
show bgp summary
Step 2b(Data plane):
show interface vxlan1
show vxlan flood vtep
Step 3 (Layer2 VPN):
Step 3a(Control Plane):
show bgp evpn instance vlan 10
show bgp evpn
show bgp neighbors 172.16.0.3 evpn advertised-routes
Step 3b:
show interface vxlan1
show vxlan flood vtep
show mac address-table
show vxlan address-table