Two N2048P not talking over Te ports

Question

I've got two N2048P's that have VERY basic configurations. They will need to connect to each other over a fiber connection but they won't talk. Unfortunately I'm trying to diagnose this remotely but I'm confident the person at the other end has done everything physically correct. To make the diagnosis easier I had him move the switches close to one another and connect them via one of the copper ports. That works fine they immediately connected up. However the fiber ports won't come up. We've confirmed the RX/TX are not crossed, we've tried new transceivers and cables, I don't think it's anything physical. I've brought the ports down and then back up and nothing. I've done dozens of these switches and with a basic configuration I've never had this happen. I've got to be missing something incredibly obvious. BTW below is output sh fiber-ports on both units show there is power in both directions.

If anyone has any idea I'd love to hear them.

Thanks

Output Input
Port Temp Voltage Current Power Power TX LOS
[C] [Volt] [mA] [dBm] [dBm] Fault
--------- ---- ------- ------- ------- ------- ----- ---
Te1/0/1 32.4 3.326 6.2 -4.589 -4.319 No No

Output Input
Port Temp Voltage Current Power Power TX LOS
[C] [Volt] [mA] [dBm] [dBm] Fault
--------- ---- ------- ------- ------- ------- ----- ---
Te1/0/1 27.0 3.333 5.8 -4.938 -4.527 No No

JohnYL · Answer

Nevermind; I had to force the speed on that port on both switches. I've never had to that before it's always been fine in auto.

DELL-Marco B · Answer

Hello, thanks for your feedback, please let us know if you need more support on that. Marco

JohnYL · Answer

I have something further on this that makes less sense. I put another one of these switches in service today (again with the latest firmware) and once again I had to force the Te1 port to 1000 for the port to come up and start forwarding.

Which led me to the next discovery. As I was moving other copper devices over to this switch I started noticing some of the ports weren't coming up. While trying to figure out why I did a 'test copper-port tdr' on one of them and when it was done the port came up. So I tried it on another and once again it came up. I realized then that these were all 10/100 devices (cameras). On the next device that didn't automatically came up instead of running the test I checked the port on the device and it was again just a 10/100M device so this time I set the port to just 10/100 and it came up perfectly. The next device with the issue I forced to just 100 and again it was fine.

Most of these devices are older 10/100 devices but they are all different manufacturers so there's no pattern there. I've never had to force a Dell switch port to exclude 1000 for a 10/100 to come up. On top of that it's very odd that the test would bring up the port without the 1000 being excluded.

Out of curiousity I rebooted the switch and found that all of the ports that gave me a problem that I had not forced the speed again didn't come up until I either forced the speed or did the cable test again.

There has go to be something I'm missing or there is something really strange going on. I might add that I've never had this issue on any N2048P's on earlier firmware and I know there are similar 10/100 devices on them. The ones that are exhibiting the problem are all on 6.6.3.12

Any ideas?

Thanks

DELL-Young E · Answer

Hi, what you are using the latest version. We could try to look into it to see if the version actually has that issue.

JohnYL · Answer

Hi, thanks for the reply. The version that we are using on these where we've seen the problem is 6.6.3.12 John

DELL-Young E · Answer

Hello I stand corrected. This is the latest version we have as of now. Apologies for the mix-up. https://dell.to/3ebUEOW

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Two N2048P not talking over Te ports

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