From mboxrd@z Thu Jan 1 00:00:00 1970 From: Evan Bigall Subject: Xen and VLANs Date: Mon, 24 Jan 2005 11:32:51 -0800 Message-ID: <41F54D63.2050203@scalent.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: xen-devel-admin@lists.sourceforge.net Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org I am using Xen 2.0 with Mandrake 10.1 based hosts and guests. There seems to be some sort of issue with VLANs and MTUs? My VMs have two nics, each connected to a separate bridge. In Dom1, I do: vconfig add eth1 5 ip addr add 10.20.8.17/24 broadcast 10.20.8.255 dev eth1.5 ifconfig eth1.5 up In Dom2, I do: vconfig add eth1 5 ip addr add 10.20.8.18/24 broadcast 10.20.8.255 dev eth1.5 ifconfig eth1.5 up Pinging from Dom2 to Dom1, packet sizes smaller than 1469 work, packet sizes of 1469 and larger just hang. If I set the MTU on the interface down to 1450, I can then ping with any packet size. Has any done any experimentation with VLANs on Xen? A problem is that the bridge does not support VLANs but I'm trying to work around that in a variety of ways. Evan ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl