Bond connection as main interface

[ruffpl]

I had install PVE7 with my mobo integrated 1GbE card as main interface. Server is connected to Dlink switch that have also bond options. I added pcie quad 1GbE card, connected by 4 cables to switch and bond them in Dlink configuration. In Proxmox I created bond0 and add 4 ports of quad GbE card to it so part of my plan was done.
I wanted to use quad card with bond connection (instead of integrated) as main Proxmox interface and main for all VMs instead of vmbr0.
I fallowed this post but after that I lost connection and had to do nano /etc/network/interfaces so to get my server working. Now I am back on the begining and dont know how to do it. Can I get some help?

 

[Dunuin]

Create your Linux bond, set your 4 NICs as slaves for that bond, choose the correct bonding mode (LACP/round-robin/active-passive or whatever but also make sure your switch is using the same configuration), bridge that bond to vmbr0 and hit the "apply" button.

In case you don't want to lock yourself out you could temporarily give the enp0s31f6 a a static IP like 192.168.1.254 so your PVE webUI will also be available on that IP if the bond fails.

 

[ruffpl]

Thanks. I had created something like on the picture but it is still causing problems.

When main cable + 4 extra cables are connected between server and switch I can not connect to PVE. I have to take out cables from switch reset and reset my router it to get connection to Proxmox back (by one cable). My switch is D-link DGS-1210-48/ in Link aggregation settings there are 2 options- LACP and Static. Dont know what is causing problems

 

[Dunuin]

Your screenshot shows that you gave your bond0 a IP but it should be without a IP (and especially not a IP that is already used somewhere else).
And your vmbr0 is still bridged to that single NIC and not to the bond,

 

[ruffpl]

Think I got it working. Now it looks like on picture ( with extra ip adress for integrated NIC).

Another problem is that my mobo have PCIe x8 1slot and PCIe x8 2slot in same color/ both for SLI/Crossfire (and both are used by me) so even if they are in different IOMMU groups when I start VM after couple minutes I loose connection to PVE. Do You think it wil be possible to do bond connection like this if instead one quad card I buy 2 dual Gbe cards but for pcie x1 size ( I got 4 of them and I think they will be in one different group). Cheapest I found is Dell 0FCGN and I am thinking to give it a try. Is something like that will going to work- 2 dual ethernet cards with 2 bonds? If not, is there some way to split these 2 pcie x8 ports so they will be separated from each other?