I have a strange issue going on with my Cat 4003 and an old Sun box. The problem is this....One interface, .44 vlan, on the Sun auto-syncs up on the switch at 100 full, while the second, .64 vlan, auto-syncs at100 half. If I force the switch port to be 100 full, I get all kinds of fcs, xmit and rcv errors. The sun box admin checks the interfaces and says they are both running at 100 full, while the switch port says the .64 is only 100 half. The Sun box has been configured to only run at 10 full. I know that Sun was supposedly notorious for not playing nice with Cisco switches. It could be a bad nic in the Sun, but the admin says that both the .44 and .64 would be showing errors at the same time. Are there any suggestions on how to fix this? Do I believe what the switch is saying or the Sun box?