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<p>Hal,<br>
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Thanks for your prompt reply. I am asking for how openSM handle different link MTUs in SA MCMemberRecord MTU. For example, if we have some links MTU as 2K, some links MTU as 1K. Then when enabling IPoIB, how does SM decide IPoIB broadcast group MCMemberRecord MTU size? When creating an IB multicast group from a 2K MTU node first, which PMTU value is attaching to this IB multicast group MCMemberRecord MTU? <br>
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Thanks<br>
Shirley Ma<br>
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<img width="16" height="16" src="cid:1__=08BBF9B0DFF4D40E8f9e8a93df938@us.ibm.com" border="0" alt="Inactive hide details for "Hal Rosenstock" <hal.rosenstock@gmail.com>">"Hal Rosenstock" <hal.rosenstock@gmail.com><br>
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<ul><b><font size="2">"Hal Rosenstock" <hal.rosenstock@gmail.com></font></b><font size="2"> </font>
<p><font size="2">07/25/07 10:57 AM</font></ul>
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<div align="right"><font size="2">To</font></div></td><td width="100%"><img width="1" height="1" src="cid:3__=08BBF9B0DFF4D40E8f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">Shirley Ma/Beaverton/IBM@IBMUS</font></td></tr>
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<font size="2">general@lists.openfabrics.org</font></td></tr>
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<div align="right"><font size="2">Subject</font></div></td><td width="100%"><img width="1" height="1" src="cid:3__=08BBF9B0DFF4D40E8f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">Re: openSM: Different IB MTUs</font></td></tr>
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<font size="4">Shirley,<br>
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<font size="4">On 7/25/07, </font><b><font size="4">Shirley Ma</font></b><font size="4"> <</font><a href="mailto:xma@us.ibm.com"><u><font size="4" color="#0000FF">xma@us.ibm.com</font></u></a><font size="4">> wrote: </font>
<ul><font size="4">Hello Hal,<br>
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How does openSM handle CAs with different MTUs in the same subnet? For example, IPoIB broadcast group MTU, IB multicast group PMTU? Does openSM pick up the smallest MTU in the subnet?</font></ul>
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<font size="4"> </font><br>
<font size="4">Are you asking about link MTU, SA PathRecord/MultiPathRecord MTU, SA MCMemberRecord MTU, or all of these ?</font><br>
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<font size="4">-- Hal</font><br>
<ul><font size="4">Thanks<br>
Shirley Ma</font></ul>
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