Linux Bridge Breaks Proxmox

[sayoakin]

I have two dedicated servers running proxmox and my intent was to cluster these.
I decided to create a new linux brigde on both vmbr1 on brigde port eno4.

One works perfect without problems.
The other server breaks proxmox each time I try and the only way to access the server is from SSH rescue mode.

Help please.

 

[oguz]

hi,

One works perfect without problems.
The other server breaks proxmox each time I try and the only way to access the server is from SSH rescue mode.

show us your network configuration cat /etc/network/interfaces

also the output of ip a command might be interesting too.

 

[sayoakin]

hi,


show us your network configuration cat /etc/network/interfaces

auto lo iface lo inet loopback iface eno3 inet manual iface eno4 inet manual auto vmbr0 iface vmbr0 inet dhcp bridge-ports eno3 bridge-stp off bridge-fd 0

As long as it is like this, it works.

When I add the following, it breaks proxmox gui and ssh. All will become inaccessible.
auto vmbr1 iface vmbr1 inet static address 51.**.**.**/32 gateway 51.**.**.254 bridge-ports eno4

also the output of ip a command might be interesting too.

ip a 1: lo: <LOOPBACK,UP,LOWER_UP>

 

[oguz]

iface vmbr0 inet dhcp

normally you shouldn't be using dhcp for your interface, but a static IP address.

did you take a look at our wiki? [0]

When I add the following, it breaks proxmox gui and ssh. All will become inaccessible.

* are you using a different IP address here? do you own that IP address as well?

One works perfect without problems.

can you show us the network config for that one?

(also might make sense to partially mask your public IP addresses when posting outputs here )

[0]: https://pve.proxmox.com/wiki/Network_Configuration#_default_configuration_using_a_bridge

 

[sayoakin]

iface vmbr0 inet dhcp

normally you shouldn't be using dhcp for your interface, but a static IP address.

That is the default after configurations after installing proxmox from the provider.

did you take a look at our wiki? [0]

* are you using a different IP address here? do you own that IP address as well?


can you show us the network config for that one?

Looks like this

auto lo iface lo inet loopback iface eno3 inet manual iface eno4 inet manual auto vmbr0 iface vmbr0 inet dhcp bridge-ports eno3 bridge-stp off bridge-fd 0 auto vmbr1 iface vmbr1 inet static address 51.**.**.**/32 gateway 51.**.**.254 bridge-ports eno4

(also might make sense to partially mask your public IP addresses when posting outputs here )

[0]: https://pve.proxmox.com/wiki/Network_Configuration#_default_configuration_using_a_bridge

I actually did but got a bit confused since that was the default and it is working on one setup

 

[oguz]

That is the default after configurations after installing proxmox from the provider.

* which version of PVE? pveversion -v

* which provider?

and it is working on one setup

* are you able ping that IP on vmbr1 on the working server and get a response?

 

[sayoakin]

* which version of PVE? pveversion -v

6.4-13

* which provider?

ovh

* are you able ping that IP on vmbr1 on the working server and get a response?

Yes. Everything works fine. All lxc works fine

 

[oguz]

6.4-13

you should also upgrade to PVE 7 [0]

Yes. Everything works fine. All lxc works fine

okay.

ovh

okay.

you should be able to change the config from dhcp to static IP (just make sure you have the same address and gateway that you'd have with DHCP)

not sure why adding the new bridge would break your setup unless you're misconfiguring something (such as using a wrong IP address or gateway)

[0]: https://pve.proxmox.com/wiki/Upgrade_from_6.x_to_7.0

 

[sayoakin]

you should also upgrade to PVE 7 [0]


okay.

okay.

you should be able to change the config from dhcp to static IP (just make sure you have the same address and gateway that you'd have with DHCP)

not sure why adding the new bridge would break your setup unless you're misconfiguring something (such as using a wrong IP address or gateway)

I just tried this and again, everything broke.
Adding bridges fails

[0]: https://pve.proxmox.com/wiki/Upgrade_from_6.x_to_7.0

Can this issue be related to this?
https://forum.proxmox.com/threads/proxmox-ovh-networking.89919/

 

[spirit]

/32 is wrong. You cant use a gateway with a /32

 

[sayoakin]

I have tried /24 with same result.