AUCTION STATES:Just to confirm, these are VPI but can only do 10GbE, and not 40GbE?
Mellanox ConnectX-2 VPI Dual-Port 40GB Adapter Card HCA-30024 700Ex2-Q
40GB/S QSFP PCIE2.0 X8 5.0GT/S
Where are you getting that info?
AUCTION STATES:Just to confirm, these are VPI but can only do 10GbE, and not 40GbE?
I was just reading it online myself. Can't remember the site, but I think it was in the user manual for these cards. It's 10 gig ethernet, or 40 gig Infiniband. No idea about IPoIB - Could be 40 gig there.AUCTION STATES:
Mellanox ConnectX-2 VPI Dual-Port 40GB Adapter Card HCA-30024 700Ex2-Q
40GB/S QSFP PCIE2.0 X8 5.0GT/S
Where are you getting that info?
Also, to run IB at 40Gb/s what other transceiver/fiber is needed? I don't have interest in running it at 10GbE at this time, what about IPoIB?
Why would auction state SFP and Mellanox site SFP+ ???
Please report back, I might pick up a few myself. What cable will you be using? The auction states that cables were cut, so you'll need some new cables.Doing some more research into the qsfp vs qsfp+ form factors. The labels on those cut $3 cables showed a couple of mellanox switch models. The user manuals for both switches show just qsfp cables. Nothing in there at all about qsfp+.
I took a chance. I'm hoping they're MPO. I'm hoping they support INF-8438 (which is, from what I can tell, the qsfp spec?). The seller refused an offer of 40@1.25 per. He accepted my offer of 40@2 per.
I just bought 8 for $2.50 ea. If we figure out how to use them, great. If we don't then I'm out $20. Hoping they work in ConnectX-3Mellanox SSF 8436 QSFP MC2207310 Infiniband Optical Transceiver Emcore | eBay
Can you buy some of those QSFP+ transceivers and an optical cable, and connect two of these Connect-X2 cards together, or is there a difference between QSFP and QSFP+? At $3 per end, those would be some super cheap cables!
Come to think of it, what kind of connector's on the optical side? MPO? LC-LC? MTP?
The seller says:Anyone have a link to the short brackets as the vendor has not replied back to my question about whether they're short/tall on the cards.
I might let me see what I have.The seller says:
I'd like to trade short for full-height brackets, I have 7 short, if someone wants to trade PM me.
- Uses Standard Profile.
That was basically my thought. My concern is that Mellanox wouldn't have put an MTP/MPO connector on there... That it's an optical cable that's not designed to be disconnected.I just bought 8 for $2.50 ea. If we figure out how to use them, great. If we don't then I'm out $20. Hoping they work in ConnectX-3
That was basically my thought. My concern is that Mellanox wouldn't have put an MTP/MPO connector on there... That it's an optical cable that's not designed to be disconnected.
If nothing else, they'll serve to keep the dust out of the QSFP slots!
I definitely will. With pictures. They should arrive some time this week. I think Thursday's the day eBay's telling me, but they're only a few hundred miles away, so they may get here quicker.Please report back on this
Since ConnectX-2 IS supported and it is NOT capable of FDR only QDR, so this should work! Now the question remains what the optical connectors are and if they are replaceable, we should see that shortly as I also ordered about a dozen of these. The listed incompatibility TeeJayHoward found I believe is purely when it comes to negotiation, i.e. both sides have to agree on either FDR or QDR transmit rates/protocols as posted by the standard.Supported with the following SW/FW revisions or later: ConnectX-3 FW:2.11.0860, ConnectX-2 FW:2.9.1000, InfiniScale-4 FW: 7.4.2310, SwitchX FW:9.1.6670, 9.1.6494, 9.2.0000, SwitchX OS:3.2.0503-15, 3.3.3000, Tools:MFT 3.1.0-1
I saw this as well, which is why I even attempted it. Additionally, in the Connect-X2 manual, the SFF-8436 standard was mentioned.Since ConnectX-2 IS supported and it is NOT capable of FDR only QDR, so this should work! Now the question remains what the optical connectors are and if they are replaceable, we should see that shortly as I also ordered about a dozen of these. The listed incompatibility TeeJayHoward found I believe is purely when it comes to negotiation, i.e. both sides have to agree on either FDR or QDR transmit rates/protocols as posted by the standard.
I spent a lot of time talking with Rob over at Mellanox's store. Here's what I learned about Infiniband cables:If anyone has good success with other cables let me know, as I need more, and don't know if copper or optical is preferred.