<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:p="urn:schemas-microsoft-com:office:powerpoint" xmlns:a="urn:schemas-microsoft-com:office:access" xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s="uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs="urn:schemas-microsoft-com:rowset" xmlns:z="#RowsetSchema" xmlns:b="urn:schemas-microsoft-com:office:publisher" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:c="urn:schemas-microsoft-com:office:component:spreadsheet" xmlns:odc="urn:schemas-microsoft-com:office:odc" xmlns:oa="urn:schemas-microsoft-com:office:activation" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:q="http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc="http://microsoft.com/officenet/conferencing" xmlns:D="DAV:" xmlns:Repl="http://schemas.microsoft.com/repl/" xmlns:mt="http://schemas.microsoft.com/sharepoint/soap/meetings/" xmlns:x2="http://schemas.microsoft.com/office/excel/2003/xml" xmlns:ppda="http://www.passport.com/NameSpace.xsd" xmlns:ois="http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir="http://schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:dsp="http://schemas.microsoft.com/sharepoint/dsp" xmlns:udc="http://schemas.microsoft.com/data/udc" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sub="http://schemas.microsoft.com/sharepoint/soap/2002/1/alerts/" xmlns:ec="http://www.w3.org/2001/04/xmlenc#" xmlns:sp="http://schemas.microsoft.com/sharepoint/" xmlns:sps="http://schemas.microsoft.com/sharepoint/soap/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:udcs="http://schemas.microsoft.com/data/udc/soap" xmlns:udcxf="http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udcp2p="http://schemas.microsoft.com/data/udc/parttopart" xmlns:wf="http://schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:dsss="http://schemas.microsoft.com/office/2006/digsig-setup" xmlns:dssi="http://schemas.microsoft.com/office/2006/digsig" xmlns:mdssi="http://schemas.openxmlformats.org/package/2006/digital-signature" xmlns:mver="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns:mrels="http://schemas.openxmlformats.org/package/2006/relationships" xmlns:spwp="http://microsoft.com/sharepoint/webpartpages" xmlns:ex12t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:ex12m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:pptsl="http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/" xmlns:spsl="http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService" xmlns:Z="urn:schemas-microsoft-com:" xmlns:st="" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-AU link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span lang=EN-US>Hi,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I am seeing a strange issue with a fairly
simple bridge I have setup (for openvpn in bridge mode).<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>eth0 --- [ openvpn machine (tap0) ] ---
eth1<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>The bridge is between tap0 and eth1 on a
debian machine running on ESX 4. (tap0 being the openvpn tunnel interface). Intermittently,
I see openvpn client MAC addresses on port 2 (eth1). When this happens, their
vpn link stops working, since arp replies are being sent back via the wrong
interface. But after a random amount of time, it will change back to port 1
(tap0) and start working again. Sometimes this is quick, sometimes it doesn't
happen for hours.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Anyone else had these issues? I've
searched the archives, and come across several people who seem to have had
similar problems - but haven't found one that has a solution yet.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I'd appreciate any suggestions on where I
should start looking to find out why/how these MAC's are being learnt on the
wrong interface...<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>brctl show br0:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>bridge name bridge id STP
enabled interfaces<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>br0 8000.005056b804c2 no eth1<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> tap0<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>brctl showstp br0:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>br0<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> bridge id 8000.005056b804c2<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> designated root 8000.005056b804c2<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> root port 0 path
cost 0<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> max age
20.00 bridge max age 20.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> hello time
2.00 bridge hello time 2.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> forward delay 5.00 bridge
forward delay 5.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> ageing time 300.01<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> hello timer 1.19 tcn
timer 0.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> topology change timer 0.00 gc
timer 2.19<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> flags <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>eth1 (2)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> port id 8002 state
forwarding<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> designated root 8000.005056b804c2 path
cost 100<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> designated bridge 8000.005056b804c2 message
age timer 0.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> designated port 8002 forward
delay timer 0.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> designated cost 0 hold
timer 0.19<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> flags <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>tap0 (1)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> port id 8001 state
forwarding<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> designated root 8000.005056b804c2 path
cost 100<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> designated bridge 8000.005056b804c2 message
age timer 0.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> designated port 8001 forward
delay timer 0.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> designated cost 0 hold
timer 0.19<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> flags<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>eg:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>brctl showmacs br0:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>port no mac addr is
local? ageing timer<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> 2 00:50:56:b8:04:c2 yes
0.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> 1 00:ff:46:97:7f:d5 yes
0.00<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> 2 7a:6e:9f:28:12:79 no
0.56<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>7a:6e:9f:28:12:79 -- the openvpn client<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>00:ff:.... -- tap0<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>00:50:56... -- eth1<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Ryan<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
</div>
</body>
</html>