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<blockquote type="cite"
cite="midE34D591C42EBD511BBD800A0C99B840D01BF7C15@wssuram1">
<p><font size="2"> </font> </p>
<p><font size="2">> Here's a stab in the dark: you might ask your
network people to </font> <br>
<font size="2">> disable IGMP-snooping / CGMP temporarily, to see
if that helps</font> <br>
<font size="2">> (we had a "freezing" problem related to CGMP). </font> </p>
<p><font size="2">Where is IGMP-snooping/CGMP disabled? Locally,
backbone, everywhere?</font> <br>
<font size="2">(I am not a really a network person so I am not sure
what these paramters mean or where they are found)</font></p>
</blockquote>
On the local switch(es) serving your AG node machines. As I'm sure
your network person will point out, disabling IGMP-snooping/CGMP will
cause multicast traffic to be flooded on the subnet, but it might help
rule out a failure mode. Our own CGMP problem caused seemingly-random
episodes of severe packet loss, but there was no regular cycle. We
eventually moved the AG-node machines to a dedicated subnet, which is
now CGMP-free.<br>
<br>
Greg, LBNL<br>
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