From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Theurer Subject: Re: networking oddities, present status ? changeset: 7145:71466686d026 Date: Fri, 30 Sep 2005 17:32:22 -0500 Message-ID: <433DBCF6.1050106@us.ibm.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Ian Pratt Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Ian Pratt wrote: >>I have been experiencing some oddities as well. Xen/bridge >>networking works on some switches, but not on others. Also >>if I have one host with a domU communicating to another host, >>an unrelated host (with xen) will sometimes get "peth0: >>received packet with own address as source address" error >>messages. I have to wonder if all these bridges on the xen >>equipped hosts need unique MAC addresses (they all have >>fe:ff:ff:ff:ff:ff) >> >> > >Interesting. Perhaps run a "tcpdump ether host fe:ff:ff:ff:ff:ff" and >see if any other host is sending packets with that as a src address. I >wander if one of the hosts on the network has STP turned on? > > I give that a shot. I have a feeling at least one of the three switches I have in my network may have STP on, and I guess I should check the xen hosts as well (they really should all be using the same network-bridge script). If STP is off everywhere, is there any reason to not use fe:ff:ff:ff:ff:ff on all xen-br0 devices? -Andrew