I have, on occasion, had to turn off autonegotiate on Bay450 gig MDA's in order to get it to connect consistantly to Passport's. Turned it off on both ends and forced to 1000 full. I've also done this to keep Bay 450's from dropping off the network during high levels of network activity, especially during RIS operations and even though Qos is used....
"Time flies like an arrow. Fruit flies like a banana." - Groucho