[SOLVED] Yet another networking issue from former ESXi user

jklocman

New Member
Dec 6, 2024
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All - I know there have been many posts regarding similar issues - and I apologize for positing if this has already been addressed - but I've been trying to shift from ESXi for five days and am at the end of my rope. For background I've been running ESXi homelabs + Unifi infrastructure for years. Networks are defined and managed within Unifi at the port level (specific ports dedicated to specific networks).

In my new proxmox instance I have created three bridges: vmbr0 for accessing the interface (on same network as Internal network), Internal for internal network traffic, and vmbr1ext assigned to external network traffic. (Internal and vmbr0 are 10.0.0.x, vmbr1ext is 172.22.x.x)

Any VM assigned to the Internal bridge is assigned an IP and works flawlessly. Anything connected to the vmbr1ext bridge does not get an IP assigned to the VM nor do the VM's (MAC) show up in unifi - however the network card does.

Below is my /etc/network/interfaces file. Any help would be greatly appreciated - again I apologize if I overlooked something insanely simple. And also note the VM's being attributed to the external network are Windows and Linux based - none act like they have any uplink at all (showing disconnected).
---------------------------------------------------
auto lo
iface lo inet loopback

auto ens6f0np0
iface ens6f0np0 inet manual

auto eno1np0
iface eno1np0 inet manual

auto eno2np1
iface eno2np1 inet manual

auto ens6f1np1
iface ens6f1np1 inet manual

auto ens6f2np2
iface ens6f2np2 inet manual

auto ens6f3np3
iface ens6f3np3 inet manual

auto vmbr0
iface vmbr0 inet static
address 10.0.0.155/24
gateway 10.0.0.1
bridge-ports eno1np0
bridge-stp off
bridge-fd 0

auto Internal
iface Internal inet manual
bridge-ports ens6f2np2
bridge-stp off
bridge-fd 0

auto vmbr1ext
iface vmbr1ext inet manual
bridge-ports ens6f0np0
bridge-stp off
bridge-fd 0

----------------------------------------------------------------------------
 
Hey,

I assume you have a DHCP server running on 172.22.0.0/16, could you run dhclient -v in a VM connected to the vmbr1ext bridge? What is the output? And just to be sure, could you also post the output of ip a from inside a VM? Can two VMs connected to vmbr1ext ping each other, after assigning them a static IP on 172.22.0.0/16?