Route10 SFP+ DAC issue

I noticed a couple other people experienced the same issue in the Route10 FAQs thread, so I figured I’d create a separate thread with my troubleshooting info in case it makes the issue easier to track and resolve.

I’m trying to use both SFP+ ports to connect to switches on my network. One switch is right next to the Route10 and the other is about 8’ away.

Troubleshooting steps so far:

  • Port WAN2 mode changed from WAN to Standard on Route10
  • Connect .5-meter 10Gtek DAC cable between Route10 LAN4 and near switch. Connects right away and works as expected.
  • Connect .5-meter 10Gtek DAC cable between WAN2 and near switch. Connects right away and works as expected.
  • Connect 3-meter 10Gtek DAC cable between either WAN2 or LAN4 port and the remote switch (~8’ away) and the remote switch will detect the connection, try to negotiate and fail. No indication that it’s detected on the Route10 when plugged into either LAN4 or WAN2.
  • Connect 3-meter 10Gtek DAC cable between both switches and they connect right away and work as expected.

The 10Gtek cable part number is CAB-10GSFP-P3M. This is 10GBASE-CU SFP+ Cable 3-Meter, Passive. I have two of these cables and the results are the same using either one. No troubles at all with the .5-meter 10Gtek cable.

Happy to do any additional troubleshooting that may help.

Thanks!

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