RB1100AH - not coming up 1gig port ?

We have recently upgraded our backhaul network, and I am in the process of making sure everything connects at 1 gig. We upgraded the firmware on our existing RB1100AH unit to 6.27 , and port 13 (Internet connection) will still not connect at 1 gig , although it shows that it is advertising, and has the capability to do so. We have another RB1100AH (a little newer unit), on the bench, that is connecting with 1 gig on Port 13 as it is supposed to.

If I remember, I saw a post somewhere that a shorter length of the jumper cable between the router and the upstream might not allow it to connect at 1 gig ? (Connected with shielded Cat5 cable - 6 inches long)

Was there a hardware problem with older RB1100 AH boards on 1 gig connections?

(Also can’t get Flow Control to go on)

Or any other possible problem ?
thanks, wayne

What, no one on this forum has an idea on solving this ?

Have you tried other cables? What’s the exact RouterBoard model? Does it happen also with other ethernet ports on that router? It could be a damaged port…

Fixed the problem…It needed a LONGER CAT 5 jumper cable. Then it would connect as 1 gig.

But unable to turn on the Flow Control on that port ?