I was checking some things on my Cisco 4500 and spot checking some of the ports. Using CNA it says it is at 10.
The web browser to the switch says
Full-duplex, 1000Mb/s, link type is auto, media type is 10/100/1000-TX on port 6i/18
The CNA says, so what would cause the difference? I would surely notice I think if it was at really 10.
I don't use CNA at all, but it could just be the way that CNA is reading the port. Can you telnet into the switch? If so, you can do "show inter | inc Gig|media" and you should get a result like below:
GigabitEthernet1/8 is up, line protocol is up (connected)
Full-duplex, 100Mb/s, media type is 10/100/1000BaseT
GigabitEthernet1/9 is up, line protocol is up (connected)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseT