qemu 1.3 network stops dead

[si458]

Hi People,

i dont know if anyone else is having this problem, but since i upgraded the pve-qemu-kvm to 1.3 the bridged network for KVM stops working

ive had to downgrade the pve-qemu-kvm to 1.2 to get it back up working again...

it works for about 2 minutes then stops,
i load up speedtest.net,
run a speedtest,
it flys up to 50mb then starts falling down quickly,
i load up CMD and try pinging anything and i get nothing ??? cant ping any other VMs or even the internet ?

im using a AMD processor and it works fine in 1.2 but not 1.3, any suggestions people i could try?

Kind Regards

Simon

 

[bhennigar]

What network card are you using in the KVM?

 

[udo]

Hi People,

i dont know if anyone else is having this problem, but since i upgraded the pve-qemu-kvm to 1.3 the bridged network for KVM stops working

ive had to downgrade the pve-qemu-kvm to 1.2 to get it back up working again...

it works for about 2 minutes then stops,
i load up speedtest.net,
run a speedtest,
it flys up to 50mb then starts falling down quickly,
i load up CMD and try pinging anything and i get nothing ??? cant ping any other VMs or even the internet ?

im using a AMD processor and it works fine in 1.2 but not 1.3, any suggestions people i could try?

Kind Regards

Simon

Hi Simon,
I use also AMD-CPUs and without trouble with network and kvm-1.3.

I guess it's more related to the network-driver? (Have you tried another NIC?)
Or how many cores do you use in the VMs? See this bug: https://bugzilla.proxmox.com/show_bug.cgi?id=278

Udo

 

[si458]

I have tried all the different network cards, e100, Realtek and virtio
What's weird is I have a Linux VM and that only has the problem from time to time not all the time like my window vms ?

Also I only have 1 nic in the server so without putting in another nic card I wouldn't be able to test if its the LAN card itself

 

[si458]

just an update,
i installed latest pve-qemu-kvm again and i noticed that i was using an old virtio-win.iso
i downloaded the latest one (virtio-win-0.1-49.iso), ran my XP pc and it seems to behaving itself
however my Win7 PC, wont pickup a DHCP address? it will only work on static IP
ive tried different dhcp servers, (mikrotik VM, zeroshell VM, ive even setup dhcp on the proxmox broadcasting on my vmbr1 card) but still no IP address is given?
Any ideas?

 

[spirit]

just an update,
i installed latest pve-qemu-kvm again and i noticed that i was using an old virtio-win.iso
i downloaded the latest one (virtio-win-0.1-49.iso), ran my XP pc and it seems to behaving itself
however my Win7 PC, wont pickup a DHCP address? it will only work on static IP
ive tried different dhcp servers, (mikrotik VM, zeroshell VM, ive even setup dhcp on the proxmox broadcasting on my vmbr1 card) but still no IP address is given?
Any ideas?

maybe this help : http://forum.proxmox.com/threads/12313-Windows-7-VIRTIO-and-DHCP
?

(Make a reply if it's working or not, so we can add this trick to the wiki)

 

[si458]

maybe this help : http://forum.proxmox.com/threads/12313-Windows-7-VIRTIO-and-DHCP
?

(Make a reply if it's working or not, so we can add this trick to the wiki)

how weird? it worked!

please do add it to the wiki, so i can remember for next time because i will defo forget about it...

for anyone whos intrested:

Disabling the Checksum Offloading the following way on Your Windows PC solved the Problem.

1. Click Start - Search and type “regedit”.

2. Go to the following registry key

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

HKEY_LOCAL_MACHINE
\SYSTEM
\CurrentControlSet
\Services
\Tcpip
\Parameters
3. Add a DWORD(32bit) Value named "DisableTaskOffload" and set it to "1".
4. Restart the Windows PC to make the changes happen.

 

[spirit]

how weird? it worked!

please do add it to the wiki, so i can remember for next time because i will defo forget about it...

for anyone whos intrested:

Disabling the Checksum Offloading the following way on Your Windows PC solved the Problem.

1. Click Start - Search and type “regedit”.

2. Go to the following registry key

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

HKEY_LOCAL_MACHINE
\SYSTEM
\CurrentControlSet
\Services
\Tcpip
\Parameters
3. Add a DWORD(32bit) Value named "DisableTaskOffload" and set it to "1".
4. Restart the Windows PC to make the changes happen.

done!
http://pve.proxmox.com/wiki/Win7_Guest_DHCP_not_working_fix