<br><tt><font size=2>Hi Ira,</font></tt>
<br>
<br><tt><font size=2>>Yea that is going to be a problem. The problem
is that effectively you just<br>
> disabled the connection to the switch. A reset disables then
enables the<br>
> port. Once the port is disabled the command can't talk to the
switch any<br>
> longer. You will have to either reset the switch (power cycle)
or go to<br>
> another node and enable the port. From the output you sent me
it looks like<br>
> you don't have any other nodes on the switch, so I take it you are
resetting<br>
> the switch to get the link to come back?</font></tt>
<br>
<br><tt><font size=2>Thanks your explanation now everything is clear. Can
I do "reset" by down/enable instead of down/disable/enable so
that I can reset the peer port on the switch?</font></tt>
<br>
<br><tt><font size=2>> I thought there was a warning in the man page
or in the help regarding this<br>
> situation but I don't see it now.</font></tt>
<br>
<br><tt><font size=2>There's a warning if I try to reset a port which is
not on the switch.</font></tt>
<br>
<br><tt><font size=2>> BTW, What are you trying to achieve with this
command?</font></tt>
<br>
<br><tt><font size=2>Sometime there's 1x link on the subnet after reboot
our system, which consists of several HCA nodes directly connected with
the switch. By reboot, I mean restart each node. I am trying to achieve
4x link width by using this command on 1x link port. Do you have any better
idea of resolving this problem?</font></tt>
<br>
<br><tt><font size=2>Thanks!</font></tt>
<br><font size=2 face="sans-serif">Yicheng Jia<br>
<br>
</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>Ira Weiny <weiny2@llnl.gov></b>
</font>
<p><font size=1 face="sans-serif">04/17/2009 12:45 PM</font>
<td width=59%>
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<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">Yicheng Jia <YJia@tmriusa.com></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td><font size=1 face="sans-serif">general@lists.openfabrics.org, Hal Rosenstock
<hal.rosenstock@gmail.com></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: ***SPAM*** Re: [ofa-general] link
width problem of Qlogic 9024 unmanaged switch</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><tt><font size=2>On Fri, 17 Apr 2009 12:06:43 -0500<br>
Yicheng Jia <YJia@tmriusa.com> wrote:<br>
<br>
> Hi Ira,<br>
> <br>
> Here is the output of "iblinkinfo.pl -R":<br>
> <br>
> ++++++++++++++++++++++++++++++++++++++++++++++++<br>
> [root@ib_manager ~]# iblinkinfo.pl -R<br>
> Switch 0x00066a00d90009c1 InfiniCon System InfinIO 9024 Lite:<br>
> 7 1[ ] ==( 4X 2.5 Gbps
Active / LinkUp)==> 6 1[ ]
"MT2520 4 InfiniHostLx Mellanox Technologies" ( )<br>
> 2[ ] ==( 4X 2.5
Gbps Down / Polling)==>
[ ] "" ( )<br>
> 3[ ] ==( 4X 2.5
Gbps Down / Polling)==>
[ ] "" ( )<br>
> 4[ ] ==( 4X 2.5
Gbps Down / Polling)==>
[ ] "" ( )<br>
<br>
[snip]<br>
<br>
> <br>
> And the "ibstat" output:<br>
> +++++++++++++++++++++++++++++++++++<br>
> [root@ib_manager ~]# ibstat<br>
> CA 'mthca0'<br>
> CA type: MT25204<br>
> Number of ports: 1<br>
> Firmware version: 1.2.0<br>
> Hardware version: a0<br>
> Node GUID: 0x0002c90200230784<br>
> System image GUID: 0x0002c90200230787<br>
> Port 1:<br>
> State: Active<br>
> Physical state:
LinkUp<br>
> Rate: 10<br>
> Base lid:
6<br>
> LMC: 0<br>
> SM lid: 6<br>
> Capability
mask: 0x02500a6a<br>
> Port GUID:
0x0002c90200230785<br>
> ++++++++++++++++++++++++++++++++++++++++++++++<br>
> <br>
> The reset command I am using is "ibportstate 7 1 reset",
I also tried <br>
> "ibportstate -D 0,1 1 reset", and it fails with the same
result.<br>
><br>
<br>
Yea that is going to be a problem. The problem is that effectively
you just<br>
disabled the connection to the switch. A reset disables then enables
the<br>
port. Once the port is disabled the command can't talk to the switch
any<br>
longer. You will have to either reset the switch (power cycle) or
go to<br>
another node and enable the port. From the output you sent me it
looks like<br>
you don't have any other nodes on the switch, so I take it you are resetting<br>
the switch to get the link to come back?<br>
<br>
I thought there was a warning in the man page or in the help regarding
this<br>
situation but I don't see it now.<br>
<br>
Also, this becomes worse if you disable the port the SM is on. (Which
I see<br>
you are doing.) So you will have a noticeable delay while the SM
rescans the<br>
network which it is now seeing "again" for the first time.<br>
<br>
BTW, What are you trying to achieve with this command?<br>
<br>
Hope this helps,<br>
Ira<br>
<br>
<br>
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