Ubuntu
linux package

  1. Bug #610391
  2. Comment #10

Comment 10 for bug 610391

Revision history for this message
In , Neil (neil-redhat-bugs) wrote :

Description of problem:

While running an Ubuntu Lucid virtual server under kvm on RHEL6, the DHCP system reports 'bad udp checksum' in response to DHCP offer packets coming from the libvirt launched dnsmasq process on the Host. Comparing RHEL5 to RHEL6 show that tx checksumming is switched on across the 'vnet' interfaces.

Version-Release number of selected component (if applicable):

kernel.x86_64 2.6.32-44.1.el6 @anaconda-RedHatEnterpriseLinux6-201004141252.x86_64/6.0

How reproducible:

Setup a virtual network handing out DHCP addresses and run a virtual machine running dhclient3. If you run the dhclient3 in the console, you will see 'bad udp checksum in 5 packets' errors. tcpdump shows that the DHCP offer packet are reaching the virtual machine.

Steps to Reproduce:
1.
2.
3.

Actual results:

'bad udp checksum in 5 packets'

Expected results:

virtual machine picks up the ip address as normal.

Additional info:

http://www.pubbs.net/201004/dhcp/30492-dhcpd-problem-on-virtual-machines.html