I have 1Gb cable service and want to upgrade my RB750 to a RB4011 and want to use the SFP+ port with S+RJ10 SFP connected to the Arris S33 modem 2.5Gb port. But it seems that there is conflicting information that it may not work in auto negotiation mode .
So to get it to work if the interface does not....
1) I could run a multi gig switch between them?
2) Force the rate of the interface to 2.5G?