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The Mellanox IB Controller
D-1 I/O Interfaces
• Two 4x InfiniBand Connectors
• I/O Panel LED Indicators
D-2 InfiniBand Interface
• MT25208 provides two 4x InfiniBand connectors for external InfiniBand
cables
D-3 LED Indicators
Number: 4
Name
Color
Physical Link
Green
Physical Link
Not Lit
Data Activity
Yellow
Link
Data Activity
Yellow
Link
Data Activity
Yellow
Link
Data Activity
Not Lit
Link
Physical/Data
Not Lit
Activity Links
D-4 Memory/Jumpers
• An optional memory DIMM slot is reserved for InfiniBand that can take
unbuffered ECC 128, 256, 512 MB or 1GB of 266/333 MHz DDR
memory. However, the current IB firmware does not support add-on
memory. Please check with Supermicro for the availability of firmware
that supports add-on memory modules.
• JPD1 is IB Performance Control Jumper. There are two settings: SDR
(Single-Data Rate: *Default) and DDR (Double-Data Rate.) Please note
that Supermicro recommends SDR only.
D-5 OS support
• Currently, the IB driver is supported by the Linux 32-bit and 64-bit
operating systems. There is no Windows OS support at this time.
(*Note: Please refer to www.mellanox.com for additional information on
the controller.)
Appendix D
InfiniBand LED Indicators
Location:
State
Blinks once
Off
Blinks once
Stays on
Blinks
continuously
Off
Off
D-1
Appendix D: Mellanox IB Controller
(*For X6DVL-INF only)
Next to the IB Connectors
Status
InfiniBand Verbs API (VAPI): On,
Physical connection between two
nodes: established
Physical Link: not connected
InfiniBand Network: established
over the physical link.
InfiniBand Connection:
established but no data
transferred
Data transferring
Data Activity Link: Not
Connected
Physical/Data Activity Links:
not connected
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