[OpenAFS] Windows 7 and the loopback adapter problem revisited

Thu, 2 Sep 2010 15:50:58 -0500

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I've been doing some experiments with the OpenAFS on Windows 7 loopback ada=
pter problem.

Configuration:
Windows 7 Ultimate, 32-bit, all updates
OpenAFS 1.5.75
A VPN using Microsoft software to another machine (64-bit Server 2008 Stand=
ard in my case)
A wireless USB adapter

Changes to default O/S & OpenAFS install:
On the Loopback adapter property page, check two boxes:
Link-Layer Topology Discovery Mapper I/O Driver & Responder
Save and reboot. Don't know if the reboot is really necessary but that's wh=
at I did.

After logging in, Kerberos, etc...
OpenAFS works as indicated by the copy of a file, dir, etc. from the consol=
e prompt.
Create a VPN connection and immediately try the copy, dir, etc. and see tha=
t OpenAFS has stopped working. Beware of misleading results because of cach=
ing.
Wait 4-5 minutes.
Repeat copy, dir, etc and see that OpenAFS now works.
Install a wireless network adapter. In my case, it was a Linksys WUSB540GC =
Rev 3. The install CD didn't work for Windows 7 so I needed to visit the we=
b site to get a driver for it.
As soon as the device showed up in "ipconfig /all" I tried OpenAFS again an=
d it worked just fine - no delay needed.

If someone has the time to play with this, can they reproduce these results=
 and perhaps try some additional tests?
Mickey.

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<div class=3DWordSection1>

I&#8217;ve been doing some experiments with the OpenAF=
S on
Windows 7 loopback adapter problem. <o:p></o:p>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<p class=3DMsoNormal>Configuration:<o:p></o:p></p>

<p class=3DMsoNormal>Windows 7 Ultimate, 32-bit, all updates<o:p></o:p></p>

<p class=3DMsoNormal>OpenAFS 1.5.75<o:p></o:p></p>

<p class=3DMsoNormal>A VPN using Microsoft software to another machine (64-=
bit
Server 2008 Standard in my case)<o:p></o:p></p>

<p class=3DMsoNormal>A wireless USB adapter<o:p></o:p></p>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<p class=3DMsoNormal>Changes to default O/S &amp; OpenAFS install:<o:p></o:=
p></p>

<p class=3DMsoNormal>On the Loopback adapter property page, check two boxes=
:<o:p></o:p></p>

<p class=3DMsoNormal>Link-Layer Topology Discovery Mapper I/O Driver &amp;
Responder<o:p></o:p></p>

Save and reboot. Don&#8217;t know if the reboot is rea=
lly
necessary but that&#8217;s what I did.<o:p></o:p>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<p class=3DMsoNormal>After logging in, Kerberos, etc&#8230;<o:p></o:p></p>

OpenAFS works as indicated by the copy of a file, dir,=
 etc.
from the console prompt.<o:p></o:p>

Create a VPN connection and immediately try the copy, =
dir,
etc. and see that OpenAFS has stopped working. Beware of misleading results
because of caching.<o:p></o:p>

<p class=3DMsoNormal>Wait 4-5 minutes.<o:p></o:p></p>

<p class=3DMsoNormal>Repeat copy, dir, etc and see that OpenAFS now works.<=
o:p></o:p></p>

Install a wireless network adapter. In my case, it was=
 a
Linksys WUSB540GC Rev 3. The install CD didn&#8217;t work for Windows 7 so =
I
needed to visit the web site to get a driver for it.<o:p></o:p>

<p class=3DMsoNormal>As soon as the device showed up in &#8220;ipconfig
/all&#8221; I tried OpenAFS again and it worked just fine &#8211; no delay
needed.<o:p></o:p></p>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<p class=3DMsoNormal>If someone has the time to play with this, can they
reproduce these results and perhaps try some additional tests?<o:p></o:p></=
p>

<p class=3DMsoNormal>Mickey.<o:p></o:p></p>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

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