Cant configure network bridge on proxmox

dav02

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Aug 27, 2020
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i have a vm on my proxmox server, ive cobfigured vmbr0 with 192.168.0.1/24 ip address, also configured linux vm with 192.168.0.10/24 ip address, how can i bridge my vms nic to proxmox servers nic?
 

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Hello Dav2 - I admit I am a bit confused by Matrix asking if you've a public IP.

As I understood it, 'by default' at install you provide a private IP to the proxmox host.
PVE then emulates a 'virtual switch' - the bridge in software.
This bridge allows the guest VMs to connect to the network at the same level as the host.

For example, if the host is on (network) 10.10.10.0/24, and a guest is connected to the bridge then for all intents and purposes the guest is ALSO on 10.10.10.0/24
And would - if such a service were running - pick up a DHCP address or use a static configuration.

I don't pretend to understand why the guest cannot connect to the wider network. I am having the same issue myself and I want to understand where I'm going wrong.

I admit I am complicating things by using VirtualBox with a Bridged interface but this is down to not having spare hardware to put PVE on (yet).
 
Last edited:
Hello Dav2 - I admit I am a bit confused by Matrix asking if you've a public IP.

As I understood it, 'by default' at install you provide a private IP to the proxmox host.
PVE then emulates a 'virtual switch' - the bridge in software.
This bridge allows the guest VMs to connect to the network at the same level as the host.

For example, if the host is on (network) 10.10.10.0/24, and a guest is connected to the bridge then for all intents and purposes the guest is ALSO on 10.10.10.0/24
And would - if such a service were running - pick up a DHCP address or use a static configuration.

I don't pretend to understand why the guest cannot connect to the wider network. I am having the same issue myself and I want to understand where I'm going wrong.

I admit I am complicating things by using VirtualBox with a Bridged interface but this is down to not having spare hardware to put PVE on (yet).
as i understood i cant do my task using a public ip for my host and a private ip address range network for vms?
 
Dav2 - your original question was how to bridge your guests to your host.

You didn't mention you had a public IP address.

However, I see that you do and want to use this as the IP of your host.

When you use bridged networking the guests must use the same IP range as the host for them to be able to communicate. This is networking 101.

The guide proxmox produce allows you to use a NATted system - you could try that?
 
Dav2 - your original question was how to bridge your guests to your host.

You didn't mention you had a public IP address.

However, I see that you do and want to use this as the IP of your host.

When you use bridged networking the guests must use the same IP range as the host for them to be able to communicate. This is networking 101.

The guide proxmox produce allows you to use a NATted system - you could try that?
i tried to have 2 interfaces on my host, 1 for internet access with public ip and 1 to contact with vms. No ivent tried nat
 
I don't know where you're configuring your set up, but I'd suggest practicing with a NAT configuration to see if this does what you expect it to in a test environment before using a public IP address.

Start out by planning your environment, what traffic you expect to come from where.
 

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