$5 Intel 100G CWDM4 QSFP28
- Thread starter DavidWJohnston
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If they are failing prematurely more than typical it is probably due to their new manufacturing process. Arista and Cisco 40/100G transceivers, including their CWDM4s, generally are rated the same (0-70C).
This could be one of those cases where people who deploy these in fan-modded switches/servers may be negatively impacted.
EDIT: I double-checked Intel's datasheet and I was mistaken. The "500m" SPTSBP2CLCxx transceivers are rated 15-55C whereas the 2km SPTSBP3CLCxx, 10km SPTSBP4CLCxx are rated 0-70C. My "500"m's VPD states 1km range.
This could be one of those cases where people who deploy these in fan-modded switches/servers may be negatively impacted.
EDIT: I double-checked Intel's datasheet and I was mistaken. The "500m" SPTSBP2CLCxx transceivers are rated 15-55C whereas the 2km SPTSBP3CLCxx, 10km SPTSBP4CLCxx are rated 0-70C. My "500"m's VPD states 1km range.
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Working on Cisco C9500-24Y4C:
Code:
High Alarm High Warn Low Warn Low Alarm
Temperature Threshold Threshold Threshold Threshold
Port (Celsius) (Celsius) (Celsius) (Celsius) (Celsius)
--------- ----------------- ---------- --------- --------- ---------
Hu1/0/26 30.1 58.0 53.0 15.0 10.0
Hu1/0/27 27.9 58.0 53.0 15.0 10.0
High Alarm High Warn Low Warn Low Alarm
Voltage Threshold Threshold Threshold Threshold
Port (Volts) (Volts) (Volts) (Volts) (Volts)
--------- ----------------- ---------- --------- --------- ---------
Hu1/0/26 3.31 3.63 3.46 3.13 2.97
Hu1/0/27 3.29 3.63 3.46 3.13 2.97
High Alarm High Warn Low Warn Low Alarm
Current Threshold Threshold Threshold Threshold
Port Lane (milliamperes) (mA) (mA) (mA) (mA)
--------- ---- --------------- ---------- --------- --------- ---------
Hu1/0/26 1 55.6 130.0 115.0 5.0 2.5
Hu1/0/26 2 55.6 130.0 115.0 5.0 2.5
Hu1/0/26 3 55.6 130.0 115.0 5.0 2.5
Hu1/0/26 4 55.6 130.0 115.0 5.0 2.5
Hu1/0/27 1 55.1 130.0 115.0 5.0 2.5
Hu1/0/27 2 55.1 130.0 115.0 5.0 2.5
Hu1/0/27 3 55.1 130.0 115.0 5.0 2.5
Hu1/0/27 4 55.6 130.0 115.0 5.0 2.5
On the topic of transceiver thermals, I just fried one of my old KAIAM 100G CWDM4 SM transceivers last night. They may be similar to these Intel ones.
My link dropped, so I pulled out the transceiver planning to push it back in, but it was so hot it was like touching a frying pan. When it cooled down it was still dead.
I had a slow fan pointed at my PCIe cards, and I didn't notice that it got unplugged when I de-dusted my computer with compressed air. It ran for about an hour with no airflow and that was enough to fry it.
Luckily I just bought 10 of the Intel ones so I have more transceivers to fry. And the 100G CX4 card is still OK, thank goodness.
Even with a slow fan pointing along the card, the exposed metal of the transceiver where the fiber plugs in is only warm. So it needs airflow but not a lot. I'm going to assume this is similar to other CWDM4s in the same vintage.
My link dropped, so I pulled out the transceiver planning to push it back in, but it was so hot it was like touching a frying pan. When it cooled down it was still dead.
I had a slow fan pointed at my PCIe cards, and I didn't notice that it got unplugged when I de-dusted my computer with compressed air. It ran for about an hour with no airflow and that was enough to fry it.
Luckily I just bought 10 of the Intel ones so I have more transceivers to fry. And the 100G CX4 card is still OK, thank goodness.
Even with a slow fan pointing along the card, the exposed metal of the transceiver where the fiber plugs in is only warm. So it needs airflow but not a lot. I'm going to assume this is similar to other CWDM4s in the same vintage.
Hey David, have you measured temperature on the outside part of the transceiver during normal operation with infrared thermometer?
I am just curious what temperature do you get. I have same brand but model 4302. On the outside part where it goes out of 100G CX4 card i get around 30-32°C. Internal temp is around 20°C higher (e.g. 50-55°C). I think max temp for these transceivers is 70°C.
I am just curious what temperature do you get. I have same brand but model 4302. On the outside part where it goes out of 100G CX4 card i get around 30-32°C. Internal temp is around 20°C higher (e.g. 50-55°C). I think max temp for these transceivers is 70°C.
Yes actually I tried this with an IR thermometer, and saw the same, 30-32C which is about the same as it feels qualitatively - But it's reflective so I wasn't sure if it's really a valid measurement.
In the overheated state it was so hot that I subconsciously ripped my hand away when I grabbed it.
In the overheated state it was so hot that I subconsciously ripped my hand away when I grabbed it.
Just put a dab of thermal paste on any reflective surface and it should give you a very good approximation of the surface temperature through your FLIR.
Queations dear friends:
1) Will these work with MellanoX ConnectX 4 cards (the MPI 100 gig version) ? Also I'd I connected them back to back so no switch involved ?
2) will they work with Dell ON switches ?
3) what exact fiber cable would I need for these?
1) Will these work with MellanoX ConnectX 4 cards (the MPI 100 gig version) ? Also I'd I connected them back to back so no switch involved ?
2) will they work with Dell ON switches ?
3) what exact fiber cable would I need for these?
1 - Yes, I use these in ConnectX-4 100G cards, they work perfectly.
2 - Not sure - Another member should be able to answer this. Some members have Dell ONs.
3 - The fiber cable you need is: Single Mode (SM) Duplex LC UPC. (Usually they are yellow cables with blue connectors)
Not pcie "cards", you need a pcie NIC. Mellanox ConnectX-3 is qsfp, x-4 probably is too. Did anyone try the x-3 with these down to 40g? I can't search easily with my phone
Note that ConnectX-4 and above will *not* accept these for 40G connections.
ConnectX-4 and above will refuse to link at 40G with non-Mellanox transceivers, even if the transceivers support 40G. 100G works fine though
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Thank You for answers !
Regarding the cable is this one correct:
20M LC UPC to LC UPC LC-LC SM 9/125 Duplex Armored Cable Fiber Patch Cord | eBay
Entdecken Sie 20M LC UPC to LC UPC LC-LC SM 9/125 Duplex Armored Cable Fiber Patch Cord in der großen Auswahl bei eBay. Kostenlose Lieferung für viele Artikel!
www.ebay.de
Any issues with these cables from China ,
Also there is thisnfrol the US but think the price is bad.
15M LC UPC to LC UPC2Duplex 3.0mm PVC(OFNR)9/125 SM Armored Fiber Patch- 0232 | eBay
Benefits of Armoured Fiber Patch Cable. Armored fiber patch cable retains all the features of standard fiber cable but is much stronger due to its extra layers of armor. With the protection of flexible and durable steel tube, armored fiber patch cable will ensure the excellent operation of your...
www.ebay.de
Any reply on which fiber cable I need for these transceivers amd Mellanox ConnectX-4 100G cards ?
The fiber mentioned looks like iss not supporting anywhere close to 100 gig speeds....
The fiber mentioned looks like iss not supporting anywhere close to 100 gig speeds....
oh it supports much more than that
That's the beauty of single mode. Any reason why you've chosen armoured cables and not normal patch cables from fs.com?
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