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Fwd: lease ip problem with ubuntu


I use CentOS6.2 as Server and I solve this problem by :

iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM

from http://www.mail-archive.com/kvm@xxxxxxxxxxxxxxx/msg41958.html

It looks like a bug for centos


---------- Forwarded message ----------
From: William Herry <william.herry.china@xxxxxxxxx>
Date: Mon, Jun 4, 2012 at 12:52 PM
Subject: [Openstack] lease ip problem with ubuntu
To: Openstack <openstack@xxxxxxxxxxxxxxxxxxx>

My ubuntu instance can't get leased IP address, CentOS instance image is OK
with that

I boot up ubuntu instance and run dhclient eth0 manually, I can see
packages from server side, I don't know why ubuntu can't get address :
12:44:11.973930 IP > BOOTP/DHCP,
Request from fa:16:3e:74:22:48 (oui Unknown), length 300
12:44:11.974184 IP > BOOTP/DHCP, Reply,
length 300

In guest ubuntu's syslog I find:
5 bad udp checksums in packets

I am thinking if it is related with my bridge settings, cause I have a two
internal network(, bonding to the same

What step should do to finger out what's going on?


William Herry


William Herry