EVPN-VXLAN technology, which can be used to connect two different datacenters over the Internet, can be done with Python on Arista. The important part; In this architecture, connection will be established over the internet, not via MPLS or special circuits. EVPN-VXLAN provides extension of VLANs at layer2 level. In such a topology, it can often create VLANs and announce these VLAN information to each other on routers. However, care should be taken in live systems when creating or announcing these VLANs. By making use of REST API technology in Arista switches, network operations can be made simpler with Python in the EVPN-VXLAN environment. Thus, daily operations can be carried out in a more controlled and automated manner.

The example topology has two datacenters connected over the internet via BGP. Clients are connected to datacenter switches and reside in the same layer2 broadcast domain via EVPN-VXLAN.

Some requirements are needed to use Python on Arista switches.

• The jsonrclib library must be imported to use some json methods. This library is required to use REST API in json format.
• Arista switches’ API URL of the jsonrpclib library. It can be accessed by the server method. This method; username, password, IP, port etc. requires parameters. In the sample code; The eapi_url parameter is the variable.
• The ssl library must be imported to pass the SSL verification.
• We define parameters and some variables to be used in commands to access the API. In the sample code; The 1500-1779 vlan range will be created and migrated to EVPN.
• In the sample code; The cmds list will be used to apply commands to devices. Commands take variables to be more flexible.

Result