[Openstack] DHCP Replies

Linus Nova linus at linusnova.com
Thu Aug 22 06:10:42 UTC 2013


Some times Dnsmasq (dhcp lease offer) does not function correctly.

try this :

killall dnsmasq

service quantum-dhcp.... restart

Hard reboot your VM and start tcpdump on the tap near Dnsmasq to check the



> Le mercredi 21 août 2013, Mina Nagy Zaki a écrit :
>> Hello,
>> I have working network configuration, VMs have access to the external
>> network, hosts have access to VMs. But DHCP replies are not making it
>> back into the VMs.
>> tcpdump and iptables tracing show me that the requests make it through
>> just fine, but the replies don't make it out of the qdhcp-XXXX
>> namespace (the go out the tap interface there but I'm not sure what
>> happens to them next)
>> How should I go about debugging this?
>> Thanks!
>> --
>> Mina Nagy Zaki
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