This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] tcp checksum errors across dom0-domu bridge

To: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>
Subject: Re: [Xen-users] tcp checksum errors across dom0-domu bridge
From: Daniel Goertzen <goertzen@xxxxxxxx>
Date: Tue, 27 Dec 2005 22:09:21 -0600
Cc: ian.pratt@xxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Wed, 28 Dec 2005 04:15:18 +0000
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <A95E2296287EAD4EB592B5DEEFCE0E9D409EC2@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <A95E2296287EAD4EB592B5DEEFCE0E9D409EC2@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mozilla Thunderbird 1.0 (Windows/20041206)
Ian Pratt wrote:

Now the dom0 and domU can ping each other, and even establish a tcp connection, but dom0->domU tcp packets always seem to have a failing checksum. (see tcpdump trace of a telnet session below)

Are you getting 'insufficient headroom' message in the domU? (see

If so, upgrade to a newer 3.0.0 build number - the RPMs on the web site
should already be updated.

No, dmesg looks clean in both dom0 and domU. Sames results for xen-3.0-testing-20051206 and xen-3.0-testing-20051227. (I only upgraded the hypervisor to 20051227.)


Xen-users mailing list