Networking issues on new install

Q

quincy__

New Member
Nov 11, 2025
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I am brand new to Proxmox, so I am sure that is part of the problem. I am setting it up for a home lab on brand new Lenovo ThinkStation P620. The install seemed to go OK, and during the install, I chose my wireless interface (I know now that probably wont work). After I found the install was missing packages (wpasupplicant, isc-dhcp-client) to make the wireless connection,

I then tried the wired connection. I set up /etc/network/interfaces to enable one of the four interfaces on my Intel I350 network adapter. The first thing I noticed was that there was no link light. I looked at ethtool enp66s0f0 and I had no driver listed and the speed was Unknown! I tried manually loading the driver (igb), but there was no change.

Not sure what to do from here...
 
Hey,

which NIC do you plan to use, the wireless one or a wired one? IIRC wpasupplicant requires a little more configuration than just installing it, but generally you really want a wired connection for the PVE host. A side note, PVE is meant to operate with a static IP, at least with one that does not change.

Could you post the output of ip a and cat /etc/network/interfaces? When making changes to /etc/network/interfaces you have to run ifreload -a. ifreload -avvv will yell at you if something is wrong in the interfaces file, can be handy at times.
 
Thanks so much for the reply! If I can use the wireless, that would be great. I have installed wpasupplicant and isc-dhcp-client and got the wireless interface working, but only with DHCP. If I statically assign the IP the interface won't come up.

I did notice that this broke ifdown and it now throws errors, but takes the interface down. I am also getting two IPV6 addresses on that interface. When I tried to do an apt update , But I got a lot of errors about the IPV6 addresses being unauthorized. I tried disabling IPV6 in /etc/network/interfaces but that didn't work. I did get it disabled with /etc/sysctl.d/disable-ipv6.conf , but that gave me some other errors.

Here is the information that you requested:

Code: 
root@vm-server:~# 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 noprefixroute
       valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 04:7b:cb:a9:b2:ba brd ff:ff:ff:ff:ff:ff
    altname enx047bcba9b2ba
3: enp66s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 6c:fe:54:b8:12:7c brd ff:ff:ff:ff:ff:ff
    altname enx6cfe54b8127c
4: enp66s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 6c:fe:54:b8:12:7d brd ff:ff:ff:ff:ff:ff
    altname enx6cfe54b8127d
5: enp66s0f2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 6c:fe:54:b8:12:7e brd ff:ff:ff:ff:ff:ff
    altname enx6cfe54b8127e
6: enp66s0f3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 6c:fe:54:b8:12:7f brd ff:ff:ff:ff:ff:ff
    altname enx6cfe54b8127f
7: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether ac:45:ef:a8:5b:f1 brd ff:ff:ff:ff:ff:ff
    altname wlxac45efa85bf1
    inet 192.168.1.237/24 brd 192.168.1.255 scope global dynamic wlp4s0
       valid_lft 84633sec preferred_lft 84633sec
    inet6 2600:1702:67f0:31f0:ae45:efff:fea8:5bf1/64 scope global dynamic mngtmpaddr proto kernel_ra
       valid_lft 3536sec preferred_lft 3536sec
    inet6 fe80::ae45:efff:fea8:5bf1/64 scope link proto kernel_ll
       valid_lft forever preferred_lft forever
8: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether 5a:c0:fc:50:e6:61 brd ff:ff:ff:ff:ff:ff
    inet 192.168.100.2/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::58c0:fcff:fe50:e661/64 scope link proto kernel_ll
       valid_lft forever preferred_lft forever

Code: 
root@vm-server:~# cat /etc/network/interfaces
auto lo
iface lo inet loopback

#auto enp66s0f0
iface    enp66s0f0 inet static
#iface    enp66s0f0 inet dhcp
         address 192.168.1.200/24
         gateway 192.168.1.254
         dns-nameservers 8.8.8.8

#auto wlp4s0
#iface    wlp4s0 inet static
iface   wlp4s0 inet dhcp
#         address 192.168.1.201/24
#         gateway 192.168.1.254
         dns-nameservers 8.8.8.8
         wpa-ssid My-SSID
         wpa-psk My-PW
         inet6 manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.100.2/24
        gateway 192.168.100.1
        bridge-ports none
        bridge-stp off
        bridge-fd 0

#iface enp66s0f0 inet manual

iface enp66s0f1 inet manual

iface enp66s0f2 inet manual

iface enp66s0f3 inet manual

iface enp1s0 inet manual

Code: 
root@vm-server:~# ifreload -avvv
info: requesting link dump
info: requesting address dump
info: requesting netconf dump
info: loading builtin modules from ['/usr/share/ifupdown2/addons']
info: module openvswitch not loaded (module init failed: no /usr/bin/ovs-vsctl found)
info: module openvswitch_port not loaded (module init failed: no /usr/bin/ovs-vsctl found)
info: module ppp not loaded (module init failed: no /usr/bin/pon found)
info: module batman_adv not loaded (module init failed: no /usr/sbin/batctl found)
info: executing /sbin/sysctl net.bridge.bridge-allow-multiple-vlans
info: module mstpctl not loaded (module init failed: no /sbin/mstpctl found)
info: executing /bin/ip rule show
info: executing /bin/ip -6 rule show
info: address: using default mtu 1500
info: address: max_mtu undefined
info: executing /sbin/sysctl net.ipv6.conf.all.accept_ra
info: executing /sbin/sysctl net.ipv6.conf.all.autoconf
info: executing /usr/sbin/ip vrf id
info: mgmt vrf_context = False
info: executing /bin/ip addr help
info: address metric support: OK
info: module ppp not loaded (module init failed: no /usr/bin/pon found)
info: module mstpctl not loaded (module init failed: no /sbin/mstpctl found)
info: module batman_adv not loaded (module init failed: no /usr/sbin/batctl found)
info: module openvswitch_port not loaded (module init failed: no /usr/bin/ovs-vsctl found)
info: module openvswitch not loaded (module init failed: no /usr/bin/ovs-vsctl found)
info: looking for user scripts under /etc/network
info: loading scripts under /etc/network/if-pre-up.d ...
info: loading scripts under /etc/network/if-up.d ...
info: loading scripts under /etc/network/if-post-up.d ...
info: loading scripts under /etc/network/if-pre-down.d ...
info: loading scripts under /etc/network/if-down.d ...
info: loading scripts under /etc/network/if-post-down.d ...
info: 'link_master_slave' is set. slave admin state changes will be delayed till the masters admin state change.
info: using mgmt iface default prefix eth
info: processing interfaces file /etc/network/interfaces
info: no interfaces to down ..
info: reload: scheduling up on interfaces: ['lo', 'vmbr0']
info: lo: running ops ...
info: executing /sbin/sysctl net.mpls.conf.lo.input=0
info: executing /etc/network/if-pre-up.d/wpasupplicant
info: executing /etc/network/if-up.d/postfix
info: executing /etc/network/if-up.d/chrony
info: executing /etc/network/if-up.d/wpasupplicant
info: vmbr0: running ops ...
info: vmbr0: bridge already exists
info: vmbr0: applying bridge settings
info: vmbr0: reset bridge-hashel to default: 4
info: reading '/sys/class/net/vmbr0/bridge/stp_state'
info: vmbr0: netlink: ip link set dev vmbr0 type bridge (with attributes)
info: executing /sbin/sysctl net.mpls.conf.vmbr0.input=0
info: writing '0' to file /proc/sys/net/ipv4/conf/vmbr0/arp_accept
info: executing /etc/network/if-pre-up.d/wpasupplicant
info: executing /bin/ip route replace default via 192.168.100.1 proto kernel dev vmbr0 onlink
info: executing /etc/network/if-up.d/postfix
info: executing /etc/network/if-up.d/chrony
info: executing /etc/network/if-up.d/wpasupplicant
info: exit status 0 in 0:00:00.192018
 
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