Bridges list empty ... what could be the reason?

E

exp

Member
Jul 20, 2023
27
1
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It's really crazy, when creating a CT or VM, I can't select anything as bridge device! Example:

1767378829599.png



However, "localnetwork" lists all my bridges and I have even renamed my previous VLAN aware bridge "br-master" to "vmbr0":

1767378900231.png



Another weird thing is that "System", "Network" of my node is empty ... even though I am not sure if there is supposed to be anything there:


1767378968970.png


One more weird thing, in the cluster config I see an SDN "localnetwork" which I didn't create, again not sure if this is supposed to be there:

1767379121218.png
 

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Hey!

To your second question, localnetwork is PVE's default simple zone that gets created automatically, no need to worry about it.

Regarding the bridges, I would need some more information to help you. It looks like PVE host has lost its network configuration. Could you please run these commands on your PVE host, and share their output:
Bash: 
cat /etc/network/interfaces
ip addr show
ip route

Is this a fresh install, or did it start happening after you made some changes? If the former, could you please share how you installed PVE?

I suspect your network interfaces configuration file is either empty or missing the bridge configuration.
 
Last edited:
Hi @abied-charreton thank you for your offer to help. It's been a while but I am still having the issue and hoping your offer still stands.

First, I installed proxmox over an existing Debian installation. I followed the instructions exactly: https://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_13_Trixie
I am aware that this is not an officially supported way. Having said that, I generally feel comfortable with Linux and internals sufficiently. I installed two separate systems that way and the issue occurs equally in both cases. Hence I believe there is a general bug somewhere as opposed to just some mishandling from my side.

And your requested commands:

Code: 
# cat /etc/network/interfaces
# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)


# The loopback interface


auto lo
iface lo inet loopback


iface eno1 inet manual


auto vmbr0
iface vmbr0 inet static
        address 169.254.255.1/32
        bridge-ports eno1
        bridge-vids 1 2 3 4 5 44
        bridge-vlan-aware yes
        bridge-fd 0
        bridge-stp off
        bridge-pvid 1


auto vmbr0.2
iface vmbr0.2 inet static
        address 192.168.200.1
        netmask 255.255.255.0
        gateway 192.168.200.254


auto vmbr0.1
iface vmbr0.1 inet static
        address 10.7.1.10
        netmask 255.255.255.0


auto eno2
iface eno2 inet static
        address 10.7.222.1
        netmask 255.255.255.0
        broadcast 10.7.222.255
        

# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute 
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP group default qlen 1000
    link/ether 0c:c4:7a:cf:83:66 brd ff:ff:ff:ff:ff:ff
    altname enp3s0
    altname enx0cc47acf8366
3: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 0c:c4:7a:cf:83:67 brd ff:ff:ff:ff:ff:ff
    altname enp0s25
    altname enx0cc47acf8367
    inet 10.7.222.1/24 brd 10.7.222.255 scope global eno2
       valid_lft forever preferred_lft forever
5: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 0c:c4:7a:cf:83:66 brd ff:ff:ff:ff:ff:ff
    inet 169.254.255.1/32 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::ec4:7aff:fecf:8366/64 scope link proto kernel_ll 
       valid_lft forever preferred_lft forever
6: vmbr0.2@vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 0c:c4:7a:cf:83:66 brd ff:ff:ff:ff:ff:ff
    inet 192.168.200.1/24 scope global vmbr0.2
       valid_lft forever preferred_lft forever
    inet6 fde6:f6f5:c665:0:ec4:7aff:fecf:8366/64 scope global dynamic mngtmpaddr proto kernel_ra 
       valid_lft forever preferred_lft forever
    inet6 fe80::ec4:7aff:fecf:8366/64 scope link proto kernel_ll 
       valid_lft forever preferred_lft forever
7: vmbr0.1@vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 0c:c4:7a:cf:83:66 brd ff:ff:ff:ff:ff:ff
    inet 10.7.1.10/24 scope global vmbr0.1
       valid_lft forever preferred_lft forever
    inet6 fe80::ec4:7aff:fecf:8366/64 scope link proto kernel_ll 
       valid_lft forever preferred_lft forever
8: tap208i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc fq_codel master vmbr0 state UNKNOWN group default qlen 1000
    link/ether 5e:b1:f5:7f:2a:17 brd ff:ff:ff:ff:ff:ff
9: veth210i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:76:86:95:74:55 brd ff:ff:ff:ff:ff:ff link-netnsid 0
10: veth300i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:cd:82:ba:16:a0 brd ff:ff:ff:ff:ff:ff link-netnsid 1
11: veth300i1@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:56:60:e1:d2:2e brd ff:ff:ff:ff:ff:ff link-netnsid 1
12: veth301i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:ed:c8:ce:13:f1 brd ff:ff:ff:ff:ff:ff link-netnsid 2
13: veth301i1@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:89:1b:6e:bc:90 brd ff:ff:ff:ff:ff:ff link-netnsid 2
14: veth302i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:fd:c6:20:45:85 brd ff:ff:ff:ff:ff:ff link-netnsid 3
15: veth302i1@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:6b:71:73:56:e4 brd ff:ff:ff:ff:ff:ff link-netnsid 3
16: veth200i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:1e:60:46:80:4b brd ff:ff:ff:ff:ff:ff link-netnsid 4
17: veth201i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:74:1f:15:fa:07 brd ff:ff:ff:ff:ff:ff link-netnsid 5
18: veth209i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:9c:4c:b3:90:f2 brd ff:ff:ff:ff:ff:ff link-netnsid 6


# ip route
default via 192.168.200.254 dev vmbr0.2 proto kernel onlink 
10.7.1.0/24 dev vmbr0.1 proto kernel scope link src 10.7.1.10 
10.7.222.0/24 dev eno2 proto kernel scope link src 10.7.222.1 linkdown 
192.168.200.0/24 dev vmbr0.2 proto kernel scope link src 192.168.200.1
 
Ok after one our debugging with Claude (I know the bad "AI" word ... ) we found the issue: Permissions of /etc/network were 700 and /etc/network/interfaces were 600. Chaged to 755 and 644 and finally worked. After half a year. YAY!

Just if someone else is facing the same issue...
 
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