Network not working in new VM

[frantek]

Hi,

I've a server with 8 VMs which work without any problem. Today I've created a new KVM-VM and setup networking for the Linux setup but no packets come back to the VM. I'v done a tcpdump on vmbr0 an can see the packet coming in and out but on the tap interface I only see outgoing packets. It looks like the bridge does not know where to send the incoming packets. What can cause this ?

root@bs02:~# tcpdump -i vmbr0 -n host 8.8.8.8
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vmbr0, link-type EN10MB (Ethernet), capture size 65535 bytes
10:33:39.842328 IP 91.121.242.31 > 8.8.8.8: ICMP echo request, id 636, seq 1, length 64
10:33:39.852027 IP 8.8.8.8 > 91.121.242.31: ICMP echo reply, id 636, seq 1, length 64
10:33:40.841232 IP 91.121.242.31 > 8.8.8.8: ICMP echo request, id 636, seq 2, length 64
10:33:40.850482 IP 8.8.8.8 > 91.121.242.31: ICMP echo reply, id 636, seq 2, length 64

root@bs02:~# 
root@bs02:~# tcpdump -i tap109i0 -n host 8.8.8.8
tcpdump: WARNING: tap109i0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tap109i0, link-type EN10MB (Ethernet), capture size 65535 bytes
10:34:04.775479 IP 91.121.242.31 > 8.8.8.8: ICMP echo request, id 638, seq 1, length 64
10:34:05.774541 IP 91.121.242.31 > 8.8.8.8: ICMP echo request, id 638, seq 2, length 64

TIA
Matthias

 

[frantek]

Nothing helped so far ... tried different Linux distributions, new KVM VMs, no success