We're having an issue in our office where none of us with Macs that are a year old or newer can connect to our main Ethernet switch board. We've had to put an intermediary 3 Com Gigabit switch in between the Ethernet wall plug and the new computers. Anyone heard of this? Is it a configuration problem? Hardware problem?
Any help/guesses welcome.
MacBook Pro, Mac OS X (10.7.4), 2.3 GHz Intel Core i7, 4GB RAM
For awhile now, the copper port on these Macs come in Gigabit Ethernet, autopolarizing, autosensing. Thus they can span the gamut from traditional 10mbit half-duplex Ethernet to 1gbit full-duplex Gigabit Ethernet. However, sometimes the port negotiation goes awry, especially when new standards get put in place and older equipment fall behind.
Have you tried forcing a fixed configuration vs. autonegotiation? System Preferences / Network / Ethernet / Advanced... / Hardware, and fiddle around with the settings?
New macs incompatible with some Ethernet switches?
