DearI have 1 cisco 4507 switch with line cards WS-X4606-X2-E, WS-X4448-GB-SFP, WSX4548-GB-RJ45 and super visor WS-X45-Sup6E. I have IOS 12.2(50)SG3 .Speed auto and duplex auto is only available for the ports WSX4548-GB-RJ45. whats is the reason behin...