VXLAN is used to extend a layer 2 domain over a layer 3 network. refer to the Arista documentation for more information.
Per the documentation, the following is needed to step a layer2 VXLAN connection.
switch(config)# interface vxlan 1
switch(config-if-Vx1)# show active
interface Vxlan1
vxlan udp-port 4789
switch(config-if-Vx1)#
The VXLAN source-interface command specifies the loopback interface from which the VTEP derives the source address (IP) that it uses when exchanging VXLAN frames.
switch(config)# interface loopback 15
switch(config-if-Lo15)# ip address 10.25.25.3/24
switch(config-if-Lo15)# exit
switch(config)# interface vxlan 1
switch(config-if-Vx1)# vxlan source-interface loopback 15
switch(config-if-Vx1)# show active
interface Vxlan1
vxlan source-interface Loopback15
vxlan udp-port 4789
switch(config-if-Vx1)#
The VTI requires a one-to-one correspondence between specified VLANs and VNI values.
switch(config)# interface vxlan 1
switch(config-if-Vx1)# vxlan vlan 100 vni 100
switch(config-if-Vx1)# vxlan vlan 200 vni 10.10.200
switch(config-if-Vx1)# show active
interface Vxlan1
vxlan udp-port 4789
vxlan vlan 200 vni 658120
vxlan vlan 100 vni 100
switch(config-if-Vx1)# vxlan vni notation dotted
switch(config-if-Vx1)# show active
interface Vxlan1
vxlan udp-port 4789
vxlan vlan 100 vni 0.0.100
vxlan vlan 200 vni 10.10.200
switch(config-if-Vx1)#
Actual example and verify #
Switch A
hostname arista-a
!
interface Loopback1
ip address 10.11.255.3/32
!
interface Vxlan1
vxlan source-interface Loopback1
vxlan udp-port 4789
vxlan vlan 7 vni 10.11.7
vxlan flood vtep 10.11.255.2
!
vxlan vni notation dotted
Switch B
hostname arista-b
!
interface Loopback1
ip address 10.11.255.2/32
!
interface Vxlan1
vxlan source-interface Loopback1
vxlan udp-port 4789
vxlan vlan 7 vni 10.11.7
vxlan flood vtep 10.11.255.3
!
vxlan vni notation dotted
If all went well you should not be able to see mac address entries
arista-a#show mac add
Mac Address Table
------------------------------------------------------------------
Vlan Mac Address Type Ports Moves Last Move
---- ----------- ---- ----- ----- ---------
7 0050.7966.681b DYNAMIC Vx1 1 0:00:05 ago
7 5017.e100.0600 DYNAMIC Et7 1 0:20:20 ago
7 505f.f600.0900 DYNAMIC Et7 1 0:20:55 ago
8 5007.5d0d.a0d4 DYNAMIC Et8 1 0:21:06 ago
8 5053.0b00.0507 DYNAMIC Et8 1 0:26:29 ago
Total Mac Addresses for this criterion: 5
Multicast Mac Address Table
------------------------------------------------------------------
Vlan Mac Address Type Ports
---- ----------- ---- -----
Total Mac Addresses for this criterion: 0
--------------------------------------------------------------------------------------
arista-b#show mac add
Mac Address Table
------------------------------------------------------------------
Vlan Mac Address Type Ports Moves Last Move
---- ----------- ---- ----- ----- ---------
7 0050.7966.681b DYNAMIC Et7 1 0:00:09 ago
7 505f.f600.0900 DYNAMIC Vx1 1 0:20:55 ago
7 507e.229b.911c DYNAMIC Vx1 1 0:00:09 ago
8 5053.0b00.0506 DYNAMIC Et8 1 0:20:36 ago
8 507e.229b.911c DYNAMIC Et8 1 0:21:02 ago
Total Mac Addresses for this criterion: 5
Multicast Mac Address Table
------------------------------------------------------------------
Vlan Mac Address Type Ports
---- ----------- ---- -----
Total Mac Addresses for this criterion: 0