SDN Cannot seem to implement an EVPN over an existing VLAN

[adamt]

All my access to the outside world is via a VLAN (Imposed by the host provider)
I setup an EVPN but cannot make it function over the VLAN. Is this a limitation of the existing SDN implimentation or am I doing something wrong?

 

[spirit]

All my access to the outside world is via a VLAN (Imposed by the host provider)
I setup an EVPN but cannot make it function over the VLAN. Is this a limitation of the existing SDN implimentation or am I doing something wrong?

do you want to bridge 1 vxlan to 1 vlan ? (l2, without routing, same subnet ?)

or do you want to route between your vxlans and yours vlans between differents subnet ?


if you want to route to the outside world, you need to define some "exit-nodes" in evpn zone config.
The traffic will be routed between vxlan and the real network through theses nodes.

 

[adamt]

I don't need to route between different subnets.
I have 3 X servers in my proxmox cluster, each with 2 X 10G nics. They are bonded together to give me a single 20G pipe on each server. I have been given a bunch of IP addresses and a Gateway for use between the servers. These are made available via the VLAN. What I want to do it to use the SDN so that my VM's use all 3 servers as exit nodes instead of just the one it resides upon. I am happy for any configuration that works.

 

[spirit]

If you want to use exit nodes, it's like a routed setup, you'll should have in you provider routers, a route like "route add subnetvm gw hypervisor(exitnode) ip".

But if it's a simple l2 vlan, I think it'll be difficult.
maybe with enabling proxyarp on hypervisors it could work, but I never have tested it.

I'll try to test proxyarp next week.

 

[adamt]

My providers have given me an IP address for each node and a default Gateway.
In addition they have given a pool of IP addresses and a default gateway for general WAN access.
Everything is via a L2 VLAN.. My VM's ignore the vnet vlan and if I add a VLAN tag to VM it fails to boot.
Anyway.. Thanks for trying. I will look forwards to seeing if proxyarp works.

 

[spirit]

My providers have given me an IP address for each node and a default Gateway.
In addition they have given a pool of IP addresses and a default gateway for general WAN access.
Everything is via a L2 VLAN.. My VM's ignore the vnet vlan and if I add a VLAN tag to VM it fails to boot.
Anyway.. Thanks for trying. I will look forwards to seeing if proxyarp works.

yes, ok it's a bridged setup on your provider side, I'll try proxy arp setup to see if it's help.

What's the usecase of vxlan/evpn here ? if you already have a vlan on your provider ?