[SOLVED] Unknown Device Type error with Network Interface?

[megacorvega]

FIXED: Just had to reboot the node after creation of the VM. Seems like the vitrual bridge wasn't initialzed until reboot.

I have just installed Proxmox on an older Dell Precision T1700 SFF PC with an Intel I7-4770 and a Samsung 840 EVO SSD. I'm currently getting this error when I try to startup any new VM:

Error: Unknown device type.
can't create interface fwln107i0 - command '/sbin/ip link add name fwln107i0 mtu 1500 type veth peer name fwpr107p0 mtu 1500' failed: exit code 2

kvm: -netdev type=tap,id=net0,ifname=tap107i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on: network script /var/lib/qemu-server/pve-bridge failed with status 512
Use of uninitialized value $tpmpid in concatenation (.) or string at /usr/share/perl5/PVE/QemuServer.pm line 5465.
stopping swtpm instance (pid ) due to QEMU startup error
TASK ERROR: start failed: QEMU exited with code 1

Here is the output of

 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: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
    link/ether f8:b1:56:b6:c8:23 brd ff:ff:ff:ff:ff:ff
    altname enp0s25
3: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether f8:b1:56:b6:c8:23 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.23/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::fab1:56ff:feb6:c823/64 scope link
       valid_lft forever preferred_lft forever
9: fwbr108i0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 4a:df:96:f2:c2:79 brd ff:ff:ff:ff:ff:ff
13: fwbr107i0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 22:f7:76:9b:8e:74 brd ff:ff:ff:ff:ff:ff

I'm not exactly sure if this is an issue with my NIC or what. Any ideas?

Note: This is the second node in my network, so I know that the ISOs I'm using work just fine on my other machine (Supermicro X9SCM-F, Xeon 1230 V2, 16 GB ECC RAM)

 

[lukeallister]

Thanks for the reboot tip. I just had the same problem and a reboot fixed it.