Previously I had my Sonicwall NSA 3500 connected to our Cisco 1700 series router and things were working fine. I unplugged the temporary cable connecting the two of them and ran a new one from the Sonicwall in our racks across a cable management system to the 1700. Now on the Sonicwall, I only am getting an amber light, which blinks occasionally. The link status on the NSA is reporting "10 Mbps half-duplex." It is set to auto-sense the speed.
Out of desperation I tried switching with a known good cable, still the same result.
With both cables, I was able to plug into my laptop, give it the right IP address info and make it out to the internet.