Re: eth0: transmit timed out

[david ahern <daahern@cisco.com>]

I presume you are using the default rtl8139 nic. Correct?

What does 'ethtool -S eth0' show when the network locks up? Many months ago
adding 'noapic' to the (guest) kernel boot parameters helped, but that option is
not currently helping with my RHEL4 networking issues.

A thread for this issue is at:
http://sourceforge.net/tracker/index.php?func=detail&aid=1802082&group_id=180599&atid=893831

david


Arne Kepp wrote:
> Hi,
> 
> I am running KVM 61 on CentOS 5.1 x86_64 (on a Dell PowerEdge 2950 
> III).  I start my virtual machine as follows:
> qemu-kvm -hda /dev/kvm_sdb/geust_root -m 1024 -net tap -net 
> nic,vlan=0,macaddr=00:16:3e:00:00:02 -daemonize -nographic -smp 2
> 
> The problem is that when the guest (also CentOS 5.1 x86_64) utilizes the 
> network heavily (scp to a machine on the same switch, around 12 mbyte/s) 
> the network on the virtual machine just drops out.
> 
> I can no longer ping the virtual machine, and any existing SSH sessions 
> die. If I connect to the virtual machine using VNC everything looks okay 
> (eth0 is up, routes are okay), but I still cannot connect to anything. 
> All other virtual machines on the same host continue to work as if 
> nothing has happened. The same problem occurred in -58 and -59.
> 
> /var/log/messages on the guest says:
> NETDEV WATCHDOG: eth0: transmit timed out
> eth0: link up, 100Mbps, full-duplex, lpa 0x05E1
> 
> Any suggestions (permanent fixes or temporary workarounds, I'll take 
> what you got) would be much appreciated.
> 
> Thanks for all the great work :)
> -Arne
> 
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