I recently upgraded to a cisco 1900 router within our local area network. I have checked the "s" indicator on the back of the 1900 and it is showing 3 blinks of which identifies a 1Gb speed. This router is connected to our Cisco 2040 switch. My question is "will the switch automatically configure to the 1Gb speed or do I need to configure it to do so? How can I tell the 2048 thru put speed?