Have a 4948 with 10 g interface on one side to an 8 port channel that connects to a 6548 card in a 6500 with sup 2 ports 17-24. Traffic on the 10 g link flatlines a 1 gig. Is this a limitation of the 6548 - like only 1 gig on a particular group of 8 ports? or what else could be throttling it?