Configure Networking for Load Balancing and Fault Tolerance

[jehchoi1]

I have three Gigabit Ethernet NICs installed on my Proxmox VE Host.
If I want to have load balancing and fault tolerance

Do I configure the Proxmox VE like this






OR do I need to use the Bond and attach it to the vmbr0 Bridge?






And do I need to configure the LAGS on the Cisco Switch's interface ports?

 

[john12]

This is similar to how I did my config, but it doesn't seem to work at VM level (works fine at host level though, I get 1.5-1.7 Gbps on 2x1 Gbps links and redundancy works as well). The main difference is that I use balance-rr on the PVE side as I don't have a managed switch at the other end (not permanently, at least). My setup:
- create bond0 with two underlying physical interfaces, mode balance-rr
- create vmbr0 with "ports bond0"
- plug VM NICs into vmbr0
I am very curious if you are facing the same issue that I am (guest VM network connectivity doesn't work / doesn't work properly if both bond0 ports are up and running). I also tested it with a managed switch and LAG set up on the switch ports, no difference.
My thread with some config snippets

 

[vesalius]

@jehchoi1
I would recommend option 2, bond0 using LACP.

With LACP specifically - yes you would also need to configure an LACP bond with gi0/1, 2, and 3 from within the cisco switch software.

 

[B.Otto]

I have three Gigabit Ethernet NICs installed on my Proxmox VE Host.
If I want to have load balancing and fault tolerance

Do I configure the Proxmox VE like this

View attachment 48150

View attachment 48149


OR do I need to use the Bond and attach it to the vmbr0 Bridge?

View attachment 48151

View attachment 48152


And do I need to configure the LAGS on the Cisco Switch's interface ports?

The second version is the right one. Make a bond with all your physical ports and add that single bond interface to your Bridge vmbr0. The bond mode depends on your switch, if your Cisco-Switch supports LACP, then that is always the way to go - but don't forget to bond those ports on the switch too.

If you added all the ports to your bridge - like in version 1, then you would create a network loop.

Kind regards,
Benedikt