[Users] InfiniBand › How to disable FDR speed in an HCA

[Eric Gamess]

Hi all,

I have an HCA that supports SDR, DDR, QDR, and FDR.
I would like to disable the support for FDR. I know about the command:

   ibportstate <lid> <portnum> speed <speed>

However, this command only enable or disable the speed for SDR, DDR,
and QDR. I also saw that the is another parameter for this command that
is called *espeed*. I tried the following command without success:

   ibportstate 1 1 espeed 0
   ibportstate 1 1 espeed disable
   ibportstate 3 1 espeed disabled
   ibportstate 3 1 espeed no
   ibportstate 3 1 espeed false
   ibportstate 3 1 espeed down

Any idea about how to disable FDR ?? Thank you very much.



By the way, here is the result of running the last command:

*ibportstate 1 1 espeed down *
Initial CA PortInfo:
# Port info: Lid 1 port 1
LinkState:.......................Active
PhysLinkState:...................LinkUp
Lid:.............................1
SMLid:...........................1
LMC:.............................0
LinkWidthSupported:..............1X or 4X
LinkWidthEnabled:................1X or 4X
LinkWidthActive:.................4X
LinkSpeedSupported:..............2.5 Gbps or 5.0 Gbps or 10.0 Gbps
LinkSpeedEnabled:................2.5 Gbps or 5.0 Gbps or 10.0 Gbps
LinkSpeedActive:.................10.0 Gbps
LinkSpeedExtSupported:...........14.0625 Gbps
LinkSpeedExtEnabled:.............14.0625 Gbps
LinkSpeedExtActive:..............14.0625 Gbps
Mkey:............................<not displayed>
MkeyLeasePeriod:.................0
ProtectBits:.....................0
# Extended Port info: Lid 1 port 1
StateChangeEnable:...............0x00
LinkSpeedSupported:..............0x01
LinkSpeedEnabled:................0x01
LinkSpeedActive:.................0x00

After PortInfo set:
# Port info: Lid 1 port 1
LinkState:.......................Active
PhysLinkState:...................LinkUp
Lid:.............................1
SMLid:...........................1
LMC:.............................0
LinkWidthSupported:..............1X or 4X
LinkWidthEnabled:................1X or 4X
LinkWidthActive:.................4X
LinkSpeedSupported:..............2.5 Gbps or 5.0 Gbps or 10.0 Gbps
LinkSpeedEnabled:................2.5 Gbps or 5.0 Gbps or 10.0 Gbps
LinkSpeedActive:.................Extended speed
LinkSpeedExtSupported:...........14.0625 Gbps
LinkSpeedExtEnabled:.............14.0625 Gbps
LinkSpeedExtActive:..............14.0625 Gbps
Mkey:............................<not displayed>
MkeyLeasePeriod:.................0
ProtectBits:.....................0
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