Creating a virtual network for VM's

[check-ict]

Hello,

I want to host VM's on a Proxmox server with a internal LAN.

I setup a vmbr0 on Proxmox.

Created a Router with 2 network adapters (both on vmbr0)
eth0 is for the WAN side (connection outside of Proxmox and internet)
eth1 is for the LAN side (10.10.X.X for internal communication)

I created a guest VM with one network adapter (on vmbr0) and set it to IP 10.10.1.2.

Everything is working, untill I started hosting websites in the LAN

Sometimes the LAN side server can't reach the router, and the router seems to have ARP problems.

What can I do to prevent this? Will it matter if I create another bridge (vmbr1) and put all VM's + eth1 of the router in this fake network card?

Yours,

Nomad

 

[udo]

Hello,

I want to host VM's on a Proxmox server with a internal LAN.

I setup a vmbr0 on Proxmox.

Created a Router with 2 network adapters (both on vmbr0)
eth0 is for the WAN side (connection outside of Proxmox and internet)
eth1 is for the LAN side (10.10.X.X for internal communication)

I created a guest VM with one network adapter (on vmbr0) and set it to IP 10.10.1.2.

Everything is working, untill I started hosting websites in the LAN

Sometimes the LAN side server can't reach the router, and the router seems to have ARP problems.

What can I do to prevent this? Will it matter if I create another bridge (vmbr1) and put all VM's + eth1 of the router in this fake network card?

Yours,

Nomad

Hi,
i prefer to use one bridge for the traffic on this bridge only.
It's easy to create an internal-bridge, i use this script to generating two bridges:

modprobe -o dummy0 dummy
modprobe -o dummy1 dummy
ifconfig dummy0 up
ifconfig dummy1 up
brctl addbr vmbr10
brctl addif vmbr10 dummy0
brctl addbr vmbr20
brctl addif vmbr20 dummy1

Udo

 

[check-ict]

Thanks Udo, this worked for me. I created a vmbr1 on my second network card.

Just don't forget to bring up the vmbr (ifconfig vmbrX up)

ifconfig eth1 up
brctl addbr vmbr1
brctl addif vmbr1 eth1
ifconfig vmbr1 up