SPICE/USB WLAN Stick kills Systemwide network

michael wagner

New Member
Aug 13, 2021
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Hi,
i have running a proxmox 7 enviroment with the current lubuntu dist. with GUI as linked VM. On the localmachine are installed from https://www.spice-space.org/download.html the virt-viewer and the usbDK. Then i connect on the localmachine a TP Link TL WNWN722-N. Open the SPICE connection and then i connect the Stick with the VM. All works fine, i see man lokal WLAN SSIDs. Then i connect to the WLAN. Test the connection, close, reconnect,... all fine, I finished my work. Close the client, shutdown the lokal pc. Next day the Proxmox System isn't longer connectet to the LAN. Ping localhost an own IP works Gatway not. The Networksettings seems ok. Couldn't find the problem. Seems that a networkconfiguraiton in a VM takes also effekt to the Proxmox host. Any Ideas what i should check. Where could be the problem?

regards
Michael
 

dcsapak

Proxmox Staff Member
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Feb 1, 2016
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Seems that a networkconfiguraiton in a VM takes also effekt to the Proxmox host.
no it does not. the host has no idea about the network config of the vm

Any Ideas what i should check. Where could be the problem?
check the syslog/journa/dmesg of the host. also see what the output of 'ip link' 'ip addr' 'ip route' is
 

michael wagner

New Member
Aug 13, 2021
28
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49
Hi Dominik,

Thx for the quick reponse. Here is the output of the ip commands

Best regards
Michael

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: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
link/ether 90:1b:0e:1c:a7:10 brd ff:ff:ff:ff:ff:ff
3: wlp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 00:c2:c6:40:0a:0b 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 c2:90:2d:4a:1a:36 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.24/24 scope global vmbr0
valid_lft forever preferred_lft forever
inet6 fe80::c090:2dff:fe4a:1a36/64 scope link
valid_lft forever preferred_lft forever
5: tap105i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master fwbr105i0 state UNKNOWN group default qlen 1000
link/ether 7a:4b:fc:39:9f:65 brd ff:ff:ff:ff:ff:ff
6: fwbr105i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 2a:0d:bf:c9:72:a2 brd ff:ff:ff:ff:ff:ff
7: fwpr105p0@fwln105i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
link/ether b2:7b:ca:fa:58:9c brd ff:ff:ff:ff:ff:ff
8: fwln105i0@fwpr105p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr105i0 state UP group default qlen 1000
link/ether 12:33:c4:f8:97:aa brd ff:ff:ff:ff:ff:ff
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP mode DEFAULT group default qlen 1000
link/ether 90:1b:0e:1c:a7:10 brd ff:ff:ff:ff:ff:ff
3: wlp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether 00:c2:c6:40:0a:0b brd ff:ff:ff:ff:ff:ff
4: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether c2:90:2d:4a:1a:36 brd ff:ff:ff:ff:ff:ff
5: tap105i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master fwbr105i0 state UNKNOWN mode DEFAULT group default qlen 1000
link/ether 7a:4b:fc:39:9f:65 brd ff:ff:ff:ff:ff:ff
6: fwbr105i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 2a:0d:bf:c9:72:a2 brd ff:ff:ff:ff:ff:ff
7: fwpr105p0@fwln105i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP mode DEFAULT group default qlen 1000
link/ether b2:7b:ca:fa:58:9c brd ff:ff:ff:ff:ff:ff
8: fwln105i0@fwpr105p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr105i0 state UP mode DEFAULT group default qlen 1000
link/ether 12:33:c4:f8:97:aa brd ff:ff:ff:ff:ff:ff
default via 192.168.1.1 dev vmbr0 proto kernel onlink
192.168.1.0/24 dev vmbr0 proto kernel scope link src 192.168.1.24
 

michael wagner

New Member
Aug 13, 2021
28
1
3
49
Seems that my message is rubbish. It seems that the networkport has been died. I had boot the system with a livelinux and i have the same problem. Other Switchport, other netcable,.. no effekt. Funny that the WLAN Stick work and the hardwaredefekt appears at the same time. Sorry for the effort!
 

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