proxmox not showing on network

[Tyrone Johnson]

Hello,
i've had a few proxmox installations, all working fine.
Recently my proxmos server has a problem, very strange. The VM's on the server are working fine and i can reach them on the network. But, i can no longer reach the proxmox server itself on the network. It has disappeared.
So, i've done a backup of my VM's and installed proxmox completely new (7.0), thinking that would solve the problem.
But, even a new installation of proxmox does not show up on the network, cannot be reached. The installation proceeds without any issues, and in the end i get the message on console to connect to the server via https://x.x.x.x:8006/ but no reaction. When i do a network IP scan i cannot find the server's IP address.
I'm guessing there is something not being set up correctly with the network card during installation, but no idea what....any tipps from anyone of what i can check?
thanks.

 

[Moayad]

Hi,

Can you ping the Proxmox IP address?

Please post the Proxmox network configuration cat /etc/network/interfaces and the output of following commands:

ip a
ip r

 

[Tyrone Johnson]

Hello, it now is working fine, all of a sudden, i did nothing. I just entered the link again and all of a sudden, after entering the link 20 times, it worked. Here is the interfaces:
auto lo iface lo inet loopback iface enp3s0 inet manual auto vmbr0 iface vmbr0 inet static address 192.168.0.20/24 gateway 192.168.0.1 bridge-ports enp3s0 bridge-stp off bridge-fd 0 iface wlp2s0 inet manual

 

[Tyrone Johnson]

It reads like it's all ok, but not sure. I'm not sure I understand the concept of the network interfaces....the hardware one is enp3s0...and i'm guessing the vmbr0 is a virtualized one?
Also, i'd like to get the wlan working also...but not sure how...

 

[Tyrone Johnson]

Here the output of the ip a and r
root@pve:~# ip a 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 valid_lft forever preferred_lft forever 2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000 link/ether b8:ae:ed:ea:c1:04 brd ff:ff:ff:ff:ff:ff 3: wlp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether 00:db:df:6c:d1:6c brd ff:ff:ff:ff:ff:ff 4: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 06:81:18:05:68:15 brd ff:ff:ff:ff:ff:ff inet 192.168.0.20/24 scope global vmbr0 valid_lft forever preferred_lft forever inet6 fe80::481:18ff:fe05:6815/64 scope link valid_lft forever preferred_lft forever 5: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master fwbr100i0 state UNKNOWN group default qlen 1000 link/ether da:a1:0c:27:f7:4a brd ff:ff:ff:ff:ff:ff 6: fwbr100i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 9e:95:68:7a:4b:d5 brd ff:ff:ff:ff:ff:ff 7: fwpr100p0@fwln100i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000 link/ether 2e:bc:04:d7:87:58 brd ff:ff:ff:ff:ff:ff 8: fwln100i0@fwpr100p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr100i0 state UP group default qlen 1000 link/ether 0e:73:59:24:2f:e3 brd ff:ff:ff:ff:ff:ff 9: veth101i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr101i0 state UP group default qlen 1000 link/ether fe:66:13:7b:01:b2 brd ff:ff:ff:ff:ff:ff link-netnsid 0 10: fwbr101i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether ea:af:02:fd:8b:36 brd ff:ff:ff:ff:ff:ff 11: fwpr101p0@fwln101i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000 link/ether 0e:fd:36:72:fa:96 brd ff:ff:ff:ff:ff:ff 12: fwln101i0@fwpr101p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr101i0 state UP group default qlen 1000 link/ether ae:cc:0e:5c:65:04 brd ff:ff:ff:ff:ff:ff root@pve:~# ip r default via 192.168.0.1 dev vmbr0 proto kernel onlink 192.168.0.0/24 dev vmbr0 proto kernel scope link src 192.168.0.20