Hi Ira,
>Yea that is going to be a problem. The problem is that effectively you
just
> disabled the connection to the switch. A reset disables then enables
the
> port. Once the port is disabled the command can't talk to the switch
any
> longer. You will have to either reset the switch (power cycle) or go to
> another node and enable the port. From the output you sent me it looks
like
> you don't have any other nodes on the switch, so I take it you are
resetting
> the switch to get the link to come back?
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?
> I thought there was a warning in the man page or in the help regarding
this
> situation but I don't see it now.
There's a warning if I try to reset a port which is not on the switch.
> BTW, What are you trying to achieve with this command?
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?
Thanks!
Yicheng Jia
Ira Weiny <[email protected]>
04/17/2009 12:45 PM
To
Yicheng Jia <[email protected]>
cc
[email protected], Hal Rosenstock <[email protected]>
Subject
Re: ***SPAM*** Re: [ofa-general] link width problem of Qlogic 9024
unmanaged switch
On Fri, 17 Apr 2009 12:06:43 -0500
Yicheng Jia <[email protected]> wrote:
> Hi Ira,
>
> Here is the output of "iblinkinfo.pl -R":
>
> ++++++++++++++++++++++++++++++++++++++++++++++++
> [r...@ib_manager ~]# iblinkinfo.pl -R
> Switch 0x00066a00d90009c1 InfiniCon System InfinIO 9024 Lite:
> 7 1[ ] ==( 4X 2.5 Gbps Active / LinkUp)==> 6 1[ ]
"MT2520 4 InfiniHostLx Mellanox Technologies" ( )
> 2[ ] ==( 4X 2.5 Gbps Down / Polling)==> [ ]
"" ( )
> 3[ ] ==( 4X 2.5 Gbps Down / Polling)==> [ ]
"" ( )
> 4[ ] ==( 4X 2.5 Gbps Down / Polling)==> [ ]
"" ( )
[snip]
>
> And the "ibstat" output:
> +++++++++++++++++++++++++++++++++++
> [r...@ib_manager ~]# ibstat
> CA 'mthca0'
> CA type: MT25204
> Number of ports: 1
> Firmware version: 1.2.0
> Hardware version: a0
> Node GUID: 0x0002c90200230784
> System image GUID: 0x0002c90200230787
> Port 1:
> State: Active
> Physical state: LinkUp
> Rate: 10
> Base lid: 6
> LMC: 0
> SM lid: 6
> Capability mask: 0x02500a6a
> Port GUID: 0x0002c90200230785
> ++++++++++++++++++++++++++++++++++++++++++++++
>
> The reset command I am using is "ibportstate 7 1 reset", I also tried
> "ibportstate -D 0,1 1 reset", and it fails with the same result.
>
Yea that is going to be a problem. The problem is that effectively you
just
disabled the connection to the switch. A reset disables then enables the
port. Once the port is disabled the command can't talk to the switch any
longer. You will have to either reset the switch (power cycle) or go to
another node and enable the port. From the output you sent me it looks
like
you don't have any other nodes on the switch, so I take it you are
resetting
the switch to get the link to come back?
I thought there was a warning in the man page or in the help regarding
this
situation but I don't see it now.
Also, this becomes worse if you disable the port the SM is on. (Which I
see
you are doing.) So you will have a noticeable delay while the SM rescans
the
network which it is now seeing "again" for the first time.
BTW, What are you trying to achieve with this command?
Hope this helps,
Ira
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