2 networks cards

[jsenzier]

Hello,

I installed 2 network cards on my computer where Proxmox is installed.

- Proxmox will access to 2 networks and to Internet :
10.0.0.0/24 (gateway : 10.0.0.1)
192.168.0.0/24 (gateway : 192.168.0.254)

I have 4 VMs :

- 3 will access to the network 10.0.0.0/24
- The last will access to the network 192.168.0.0/24 (ip 192.168.0.199/24)

This is my proxmox interface :



What is the procedure to do this ?

If I try to add vmbr1 :
Ip : 192.168.0.198
Netmask : 255.255.255.0
Gateway : 192.168.0.254

But I have an error message :
gateway: Default gateway already exists on interface 'vmbr0'.

How can i do this ?

 

[pirateghost]

You can only have ONE gateway on a machine.

 

[jsenzier]

And how can I configure my proxmox to access to the two networks ?

 

[pirateghost]

And how can I configure my proxmox to access to the two networks ?

I don't understand what you are trying to do. You just configure one with a gateway and the other without.

Can you explain what it is you are trying to accomplish? Basic networking states you can only have one gateway.

 

[jsenzier]

I have 2 network cards in my computer with Proxmox (eth0 and eth1)

My computer is connected to 2 networks : 10.0.0.0/24 and 192.168.0.0/24

I have 4 VM :
- 3 on the first network (10.0.0./24)
- 1 on the second network (192.168.0.0/24)

The gateway to access to Internet in the first network is 10.0.0.1
The gateway to access to Internet in the second network is 192.168.0.1

All the VM need to access to Internet

How can I do this ?

 

[pirateghost]

You configure your VM with the gateway you want it to go out. Your host doesn't have to be able to browse the internet from both networks.

 

[jsenzier]

IP Address of my VMs :

Host : 10.0.0.188
Host : 192.168.0.198

VM1 ---> 10.0.0.73
VM2 ---> 10.0.0.189
VM3 ---> 10.0.0.190

VM4 ---> 192.168.0.199

So, on my host, what's the procedure ? And on the VMs ?

 

[pirateghost]

Your host only needs a connection to the second network. The VM is where you configure the gateway.

I have 6 different networks on my proxmox cluster. Only one system gateway because the VM network is 'separate' from the host.

Technically if you don't want to update the host, you don't need a gateway at all on your host.

Just load your VM and configure its network settings to work on that second network.

 

[jsenzier]

It's my configuration :



I add the gateway 192.168.0.1 on the last VM 192.168.0.199.

But, I can't access to Internet with the VM.

Can you explain, step by step, what's the procedure ?

 

[pirateghost]

You should take the time to read the wiki that talks about network configuration. I see problems with your config.

 

[jsenzier]

This wiki ?

http://pve.proxmox.com/wiki/Network_Model

What's wrong with my configuration ?

 

[pirateghost]

This wiki ?

http://pve.proxmox.com/wiki/Network_Model

What's wrong with my configuration ?

Yes.

You should have an IP address on the vmbr, not directly on the ETH device.

 

[jsenzier]

I changed my configuration :



I have now 2 vmbr, and on the vmbr1, a gateway for the second network 192.168.0.0/24.

What's the next step ?

 

[pirateghost]

I changed my configuration :

View attachment 2296

I have now 2 vmbr, and on the vmbr1, a gateway for the second network 192.168.0.0/24.

What's the next step ?

Your VM needs to be connected to vmbr1 then.

 

[jsenzier]

So, I add a VETH on my VM with vmbr1 ?
Then, a VENET with the ip address 10.0.0.189 ?

 

[pirateghost]

So, I add a VETH

Remove the connection you have now on the VM. Add a network adapter, and tie it to vmbr1

 

[jsenzier]

I added my VETH :



I add a VENET with the IP Address I want ?

 

[pirateghost]

I added my VETH :

View attachment 2297

I add a VENET with the IP Address I want ?

You shouldn't need to do anything now. Your VM is configured for dhcp?

 

[jsenzier]

Without venet, I don't have any IP Address. It's only static IP, so I need to add a venet ?

 

[pirateghost]

Without venet, I don't have any IP Address. It's only static IP, so I need to add a venet ?

Inside the VM, you can configure the IP address exactly how you want.