Can't get the second subnet working

[sitesten]

I need to configure two subnets to be used by my KVM machines.

Initially I configured the vmbr0 interface with a configuration like this:

auto vmbr0
iface vmbr0 inet static
address xxx.xxx.216.48
netmask 255.255.255.248
bridge_ports none
bridge_stp off
bridge_fd 0

It worked just perfect and all the VMs assigned to vmbr0 have network connection. Later I got another subnet and tried to add an additional network interface like:

auto vmbr1
iface vmbr1 inet static
address xxx.xxx.108.0
netmask 255.255.255.248
bridge_ports none
bridge_stp off
bridge_fd 0

Unfortunately any VM assigned to vmbr1 does seems to have a network.
Anyone have an idea what's wrong with my configuration?

 

[mfarroyo]

I believe that you have to bind the bridge to your physical network device ... for instance, you can have your /etc/network/interfaces contain:

auto lo
iface lo inet loopback

auto vmbr0
iface vmbr0 inet static
address 192.168.xxx.xxx
netmask 255.255.255.0
gateway 192.168.xxx.1
bridge_ports eth0
bridge_stp off
bridge_fd 0

auto vmbr1
iface vmbr1 inet static
address 192.168.yyy.yyy
netmask 255.255.255.0
gateway 192.168.yyy.yyy
bridge_ports eth1
bridge_stp off
bridge_fd 0

This assumes that xxx and yyy are your two subnets.

hope that helps.

 

[sitesten]

Both subnets are using the same Ethernet adapter although I'm going to try explicitly specifying eth0 for both of them.

 

[sitesten]

This still doesn't work. Any ideas what to do?

 

[snowman66]

Remove the IP from bridge and use IP inside VM.

 

[Netizen]

Remove the IP from bridge and use IP inside VM.

Has this worked?

 

[snowman66]

Has this worked?

Yes.

 

[sitesten]

No it isn't. Any other ideas?

 

[bantu]

I am not sure I understand what you're trying to achieve. Maybe you can describe it a little better/more.

If you're using a bridged network setup for the VM, adding a second IP-subnet to the VM should not require any changes in the Proxmox VE host at all. See e.g. http://www.nish.com/2007/12/how-to-set-multiple-ips-on-debian/

 

[sitesten]

I'd like to use bridged networking with two different subnets that are having two different gateways. I have a single network interface. The link you provided seems to be related with a different case.

 

[kotakomputer]

I'd like to use bridged networking with two different subnets that are having two different gateways. I have a single network interface. The link you provided seems to be related with a different case.

No need to alter your /etc/network/interfaces, simple edit /etc/vz/vz.conf

#NEIGHBOUR_DEVS=detect

Change this line to:

NEIGHBOUR_DEVS=all

Now, restart:
# /etc/init.d/vz restart

Run again your VPS via Proxmox Web UI or CLI:
# vzctl start VPS_ID

The try to PING your 1st and 2nd subnet.