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<TITLE>RE: [openib-general] RE: OpenSM Work</TITLE>
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<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>Hello
All,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>I have a question
regarding the exact meaning of the mtu selector in the
MCMemberRecord:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>Does the multicast
group carry a range of mtus according to the creation request mtu_selector
and</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>mtu, or does it
carry an exact mtu selected according to the request mtu_selector and
mtu?</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=203030707-08082005></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>When a multicast
group is created, if the value of the mtu selector in the request
MCMemberRecord</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>is not 2 (meaning:
greater than or lower than), does this value of the mtu_selector have a
</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>meaning outside the
scope of the creation request? </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>For example, if a
request to create was received with mtu selector = 0, and the mtu =
256.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>and the multicast
group was created with the <STRONG>specific </STRONG>mtu value 2048 (selected by
the SA according to p913 l14-16):</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=203030707-08082005>1. Does a join
request with mtu=1024, and selector=2 succeed?</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff><SPAN class=203030707-08082005>
<DIV><FONT color=#000000 face=Arial size=2><SPAN class=203030707-08082005>2.
Does a query request with mtu=256, and selector=0 (both compmask are set) return
the above mcgroup?</SPAN></FONT></DIV>
<DIV><SPAN class=203030707-08082005></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT color=#000000 face=Arial size=2><SPAN class=203030707-08082005>My
understanding is:<BR>mcgroup does <STRONG>not </STRONG>carry the mtu_selector
value, meaning it will always carry an exact mtu value.</SPAN></FONT></DIV>
<DIV><FONT color=#000000 face=Arial size=2><SPAN class=203030707-08082005>Thus
the answers to the previous questions are: </SPAN></FONT></DIV>
<DIV><FONT color=#000000 face=Arial size=2><SPAN class=203030707-08082005>1. No.
Since the mcgroup was created with mtu=2048.</SPAN></FONT></DIV>
<DIV><FONT color=#000000 face=Arial size=2><SPAN class=203030707-08082005>2. No.
There is no meaning for this query (the mtu must be provided along with mtu
selector).</SPAN></FONT></DIV>
<DIV><FONT color=#000000 face=Arial size=2><SPAN
class=203030707-08082005></SPAN></FONT> </DIV>
<DIV><FONT color=#000000 face=Arial size=2><SPAN class=203030707-08082005>Thank
you in advance,</SPAN></FONT></DIV>
<DIV><FONT color=#000000 face=Arial size=2><SPAN
class=203030707-08082005>Yael</SPAN></FONT></DIV>
<DIV><FONT color=#000000 face=Arial size=2><SPAN
class=203030707-08082005></SPAN></FONT> </DIV></SPAN></FONT></DIV></BODY></HTML>