KVM network problem :(

[grzech]

Hi,
I have a curious case in my Proxmox 1.5 (2.6.24-10-pve).
From time to time I lose the network connection to the KVM. I tested on KVM/Linux 2.6 and KVM/Windows2008 with different virtual network cards (rtl8139, e1000, Virtio). The machine is not busy. Loss of connection does not occur at once on all network adapters. Occurs at irregular intervals and the host interface works fine.

On the host network card is: Intel Corporation 82574L Gigabit Network Connection.

Has anyone met with this problem?

 

[Mirage]

Can you post your /etc/network/interfaces ?

 

[grzech]

Can you post your /etc/network/interfaces ?

# The loopback network interface
auto lo
iface lo inet loopback
# for Routing
auto vmbr1
iface vmbr1 inet manual
        post-up /etc/pve/kvm-networking.sh
        bridge_ports dummy0
        bridge_stp off
        bridge_fd 0

# vmbr0: Bridging. Make sure to use only MAC adresses that were assigned to you.
auto vmbr0
iface vmbr0 inet static
        address X.Y.Z.129
        netmask 255.255.255.0
        network X.Y.Z.0
        broadcast X.Y.Z.255
        gateway X.Y.Z.254
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

my KVM uses vmbr0 for network communication

 

[ressel]

My debian KVM machine losses it's connection too, from time to time.
Then i run /etc/init.d/network restart and it works again, but its pretty annoying.

When i open vnc console i can see this printed on the screen:
NETDEV WATCHDOG: eth0: transmit timed out

Then i run /etc/init.d/network restart and network is working again.

 

[whinpo]

I have the same trouble with 2.6.32-2 and a Windows 2000 server.
If i remember well, I had errors in the kernel.log
something like :

May 11 18:40:53 neptune3 kernel: vmtab119i0: no IPv6 routers present
May 11 18:48:19 neptune3 kernel: vmbr0: port 2(vmtab119i0) entering disabled state
May 11 18:48:19 neptune3 kernel: vmbr0: port 2(vmtab119i0) entering disabled state