NFS is an IP protocol, it doesn't negotiate layer2 speeds. So I doubt that's it. Sounds like you've narrowed the problem down to the brocade switch. Are there firmware updates for it? Have you engaged their support? <span></span><br>
<br>On Saturday, February 2, 2013, Daniel Feenberg wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
We have a Brocade 24 port 10GBE switch connected to a Dell GigE switch<br>
using one of the 4 GigE ports on the Brocade. There is NFS traffic accross<br>
the link, not much else. Every few weeks the link refuses to carry any<br>
traffic. Details:<br>
<br>
0) There is no error message on the Brocade console.<br>
1) The lights on both switches say the link is up.<br>
2) Power-cycling the Dell has no effect.<br>
3) There are devices on the other 3 GigE ports, they are<br>
unaffected.<br>
4) Replacing the Dell with Netgear has no effect.<br>
5) The Brocade says the link is up, but if the link is disabled<br>
the Brocade won't reenable it.<br>
6) Traffic within each switch is normal - only the link is affected.<br>
7) A warm boot of the Brocade restores service every time.<br>
<br>
Any thoughts about what could cause this? I don't think it is a problem<br>
with the patch cable (0% packet loss) or a loop (checked for that), or<br>
authentication (switch is in factory default configuration other than IP<br>
address and logging).<br>
<br>
Is there some reason that NFS can't negotiate the difference in speed?<br>
<br>
dan feenberg<br>
<br>
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