We have Mellanox Infiniband FDR cards and cables supporting it. We want to reduce the speed of the adapters from 56 Gbps to 40 Gbps. We tried using ibportstate of the node. However, it does not help. Please let me know the exact sequence of commands to do so.
Card :
Mellanox Tech. MT27500 Family [ConnectX-3]
Switch : Mellanox 6536 Switch
ibportstate fdr10 0 espeed 30
ibportstate reset
Hi,
Thanks for the help, however, unfortunately this didn’t help.
Without firing command:
CA PortInfo:
LinkState:…Active
PhysLinkState:…LinkUp
Lid:…144
SMLid:…442
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
StateChangeEnable:…0x00
LinkSpeedSupported:…0x01
LinkSpeedEnabled:…0x01
LinkSpeedActive:…0x00
After firing the above mentioned commands, i.e.
ibportstate 144 1 fdr10 0 espeed 30
ibportstate 144 1 reset
We get below output
CA PortInfo:
LinkState:…Active
PhysLinkState:…LinkUp
Lid:…144
SMLid:…442
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
StateChangeEnable:…0x00
LinkSpeedSupported:…0x01
LinkSpeedEnabled:…0x00
LinkSpeedActive:…0x00
Can you please help ?
CA ‘mlx4_0’
CA type: MT4099
Number of ports: 1
Firmware version: 2.30.8000
Hardware version: 0
Node GUID: 0x0002c903001f69e0
System image GUID: 0x0002c903001f69e3
Port 1:
State: Active
Physical state: LinkUp
Rate: 56
Base lid: 144
LMC: 0
SM lid: 442
Capability mask: 0x02514868
Port GUID: 0x0002c903001f69e1
Link layer: InfiniBand