The MGS can be behind an lnet router. So, provided you have LNET routing set up between<div>A and B, the MGS should be okay with only a subnet A address, clients on B with proper</div><div>routing configuration should be fine. </div>
<div><br></div><div>The address on net C is thus immaterial.</div><div>cliffw</div><div><br><br><div class="gmail_quote">On Tue, Jan 25, 2011 at 6:51 AM, Bob Ball <span dir="ltr"><<a href="mailto:ball@umich.edu">ball@umich.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div text="#000000" bgcolor="#ffffff">
Hi, no response on this the first time I sent it around. Can anyone
help me on this?<br>
<br>
Thanks,<br><font color="#888888">
bob</font><div><div></div><div class="h5"><br>
<br>
-------- Original Message --------
<table border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<th valign="BASELINE" align="RIGHT" nowrap>Subject: </th>
<td>[Lustre-discuss] question about routing between subnets</td>
</tr>
<tr>
<th valign="BASELINE" align="RIGHT" nowrap>Date: </th>
<td>Fri, 21 Jan 2011 15:48:25 -0500</td>
</tr>
<tr>
<th valign="BASELINE" align="RIGHT" nowrap>From: </th>
<td>Bob Ball <a href="mailto:ball@umich.edu" target="_blank"><ball@umich.edu></a></td>
</tr>
<tr>
<th valign="BASELINE" align="RIGHT" nowrap>To: </th>
<td>Lustre discussion <a href="mailto:lustre-discuss@lists.Lustre.org" target="_blank"><lustre-discuss@lists.Lustre.org></a></td>
</tr>
</tbody>
</table>
<br>
<br>
<pre>Our lustre 1.8.4 system sits primarily on subnet A. However, we also
have a small number of clients that sit on subnet B. In setting up the
subnet B clients, we provided lnet router machines that have addresses
on both subnet A and on subnet B, the MGS machine has addresses on both
subnet A and subnet B, and all the OSS have lnet routing that lets this
work. Our world is a happy place.
Now, due to other factors, we have to change the MGS subnet B address to
instead be on subnet C. Subnet C will be set up to have the usual IP
routing to find subnet B, but what will happen to the clients that exist
only on subnet B? Is there a way for them to find the MGS at boot time,
or are they going to stop working once this network change is effected?
Thanks much,
bob
_______________________________________________
Lustre-discuss mailing list
<a href="mailto:Lustre-discuss@lists.lustre.org" target="_blank">Lustre-discuss@lists.lustre.org</a>
<a href="http://lists.lustre.org/mailman/listinfo/lustre-discuss" target="_blank">http://lists.lustre.org/mailman/listinfo/lustre-discuss</a>
</pre>
</div></div></div>
<br>_______________________________________________<br>
Lustre-discuss mailing list<br>
<a href="mailto:Lustre-discuss@lists.lustre.org">Lustre-discuss@lists.lustre.org</a><br>
<a href="http://lists.lustre.org/mailman/listinfo/lustre-discuss" target="_blank">http://lists.lustre.org/mailman/listinfo/lustre-discuss</a><br>
<br></blockquote></div><br></div>