Why I cannot use a stp bridge to do a full mesh?
- Thread starter mgiammarco
- Start date
I do not understand. You can't do it, but you've done it ? That doesn't make a lot of sens. You can't do it through the GUI ? Well, it's an advanced options most users will never need to understand or set. You can always set it in /etc/network/interfaces manually
I explain better. In proxmox documentation I read that stp must be off. On proxmox created bridges I see they put stp off.
In this case stp must be on to avoid loops: the standard way to connect several servers without using switches is to put nics in bridges with stp on.
Now in the link above they use non standard ways (l3 routing?!?) to do the same thing you do with bridges.
It seems that proxmox developers do not want to use bridge and stp on.
So I ask: is there a real reason? Because I have tried in a test lab and it works. I would like to know all problems before putting it in production.
In this case stp must be on to avoid loops: the standard way to connect several servers without using switches is to put nics in bridges with stp on.
Now in the link above they use non standard ways (l3 routing?!?) to do the same thing you do with bridges.
It seems that proxmox developers do not want to use bridge and stp on.
So I ask: is there a real reason? Because I have tried in a test lab and it works. I would like to know all problems before putting it in production.
You can still enable stp in /etc/network/interfaces if so you want. All the SDN stuff, including l3 routing are for situations where simple bridges are not an option (eg, when you do not control the l2 between your nodes, so no VLAN. Or when your hostser doesn't provides QinQ etc.)
The main problem with spanning tree is convergence time. And, if proxmox vmbr bridge have spanning tree enabled, if you reboot a proxmox node, you'll have network errors during the convergence.
So, it's off by default for that.
But you can enable spanning tree if you really need it. (like for full mesh).
Another way, build layer3 point2point between each host, and use a vxlan to build the layer2.
(proxmox 6.2 have a new sdn feature (beta) with vxlan support)
So, it's off by default for that.
But you can enable spanning tree if you really need it. (like for full mesh).
Another way, build layer3 point2point between each host, and use a vxlan to build the layer2.
(proxmox 6.2 have a new sdn feature (beta) with vxlan support)
I have chosen to use batman protocol and now I have a full mesh with all links in the server working (full bandwidth, no waste) and at level 2.
If you want to enhance wiki I can post details.
If you want to enhance wiki I can post details.