If anyone has seen something similar to the problem below, has
a solution (or even a suggestion) I'd appreciate hearing from
you.

I'm attempting to physically connect a fast ethernet network device
to a Sunray 270 via an ethernet cable but I can't get the devices
to link at the ethernet level (i.e. the ethernet port link LEDs
don't light up).

If I use a fast ethernet switch to "extend" the network from the
network device and then plug the Sunray into the switch,
everything works fine, albeit with a lot more clutter.

I've checked the usual suspects like bad cables and manual port
overrides, but the problem appears to be specific to these two
machines, i.e.:

  - if I unplug the ethernet cable from the Sunray and plug it
    into a non-Sunray machine then I immediately get a link
  - if I unplug the ethernet cable from the network device and
    plug it into a different switch then I immediately get a link

The problem isn't specific to this Sunray 270 as I've tried a
Sunray 2 unit with the same results.

Both the network device and the Sunray were set set to autonegotiate,
but I've tried manually setting the network device to 100FDX, and
setting the Sunray to force full duplex to no avail.

The Sunray OSD shows that it is attempting various different
ethernet configurations when I reset it (10H,10F,100H,100F),
but it eventually just shows '???'.

Sunray firmware is the version that shipped with SRSS 5/SRS 4.2.

I've not run into this problem before - is there something
"different" about the Sunray ethernet ports that would cause this?

Thanks,

Sean

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