MTU 9000 - Which interfaces?

[rootdet]

Hello All,

New to Proxmox, not new to networking or virtualization. I am trying to figure out where to properly put the MTU 9000 configs. This is for a home setup, nothing overly corporate fancy. However I intend to run a Proxmox cluster, and thought I would run the VM storage off the Synology Nas. Additionaly, some VM's and containers would get the NAS vlan (media server, etc) as a secondary nic.

Here is my concept.

Vlan 122 - General Server Vlan, default 1500 MTU
Vlan 123 - NAS/SAN vlan (MTU 9000)

Here is my current Network config thus far.

auto lo
iface lo inet loopback

auto enp90s0
iface enp90s0 inet manual

iface enp87s0 inet manual

auto enp2s0f0np0
iface enp2s0f0np0 inet manual
        mtu 9000

auto enp2s0f1np1
iface enp2s0f1np1 inet manual
        mtu 9000

iface wlp91s0 inet manual

auto bond0
iface bond0 inet manual
        bond-slaves enp2s0f0np0 enp2s0f1np1
        bond-miimon 100
        bond-mode 802.3ad
        mtu 9000

iface bond0.122 inet manual

auto vmbr0v122
iface vmbr0v122 inet static
        address 192.168.122.xx/24
        gateway 192.168.122.1
        bridge-ports bond0.122
        bridge-stp off
        bridge-fd 0

auto vmbr0
iface vmbr0 inet manual
        bridge-ports bond0
        bridge-stp off
        briodge-fd 0

My thought is add this:

auto vmbr0v123

iface vmbr0v123 inet static

        address 192.168.123.xx/24

        bridge-ports bond0.123

        bridge-stp off

        bridge-fd 0

Is this correct, would i need to add the mtu to vmbr0?

 

[gurubert]

Is this correct, would i need to add the mtu to vmbr0?

No, as vmbr0 is not in the path of the packages. But you would need to add mtu 9000 to vmbr0v123 and the missing bond0.123.