Connect two physical servers together without a router

cancan

New Member
Sep 30, 2019
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Hello all,
I have two physical servers. They both have 4 physical network interface/ports on them.

I currently use port 0 to connect them to my office network via a router.

What I want to do is:

I want to create a private network between two servers without using a router. I want to use one of my other available port to create a private connection between these two servers without a router.

I want to use this network interface for clustering purposes.


How can I set this up?
 

cancan

New Member
Sep 30, 2019
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I connected them together with a network cable and tried to configure a Linux bridge but it didn't work.

Please see attached screenshot for your reference... and excuse my ignorance.
 

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  • proxmox.png
    proxmox.png
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wolfgang

Proxmox Staff Member
Staff member
Oct 1, 2014
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Hi,

I'm not understanding exactly what you mean by
clustering purposes
I would only use IPs on the vmbr1 which must be in the same subnet.
With this setup, you can communicate PVE_A <--> PVE_B and Guest on PVE_A <--> Guest on PVE_B
 
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cancan

New Member
Sep 30, 2019
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Hello @wolfgang

I simply want two servers to use a dedicated network interface/port for cluster communication.

vmbr1 is on the same subnet on both servers. As you can see from the screenshot, I've assigned10.10.10.30 and 10.10.10.20
They cannot communicate together for some reason tho... I feel like Debian host doesn't know how to route the traffic

What am I missing
 

wolfgang

Proxmox Staff Member
Staff member
Oct 1, 2014
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vmbr1 is on the same subnet on both servers.
proxmox1 10.10.10.30/24 is not the same subnet as
proxmox2 10.100.10.20/24
This is your snapshot showing.
 

LnxBil

Famous Member
Feb 21, 2015
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Germany
I want to create a private network between two servers without using a router. I want to use one of my other available port to create a private connection between these two servers without a router.

Just to clear things up: routers forward packages between computer networks, not hosts. You also don't need a router in your home/office setup if all computers are on the same network (and I mean that IP-wise, not hardware cable wise).
 

cancan

New Member
Sep 30, 2019
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proxmox1 10.10.10.30/24 is not the same subnet as
proxmox2 10.100.10.20/24
This is your snapshot showing.

How come they are not in same subnet?
10.10.10.0/24 should contain 10.10.10.30 as well as .20

What am I missing here.

1570336280618.png
 

Mike Lupe

Member
Nov 25, 2018
58
11
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As your screenshot shows, you're using 10. 100. 10.20/24 on proxmox 2, instead of 10. 10. 10.20/24.

It's "100" vs "10" on the second byte of your CIDR entry.
 

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