Re: Gigabit adapters not backwards compatible?

news.lightship.net wrote:
I have some A8V boards with the Mavell Yukon Gigabit adapter and some a few models of the A7V that either have the Yukon or the 3Com Gigabit adapters. I am having a really hard time with these working with any switches or hubs that are more than a year old. Here are some of the problems I am having:

1 . On my home computer (A8V Deluxe) I had a Dell True Moble 2300 router with 4 port 100MB switch. My Yukon adapter would not work with that. I just purchased the new Linksys router that has the ability to use the Vonage phone and my Yukon adapter won't work on that 100 MB switch either. I had to go buy another NIC.

2. At work I have a 3 Com Superstack II Switch 1000 which is a 24 port 100MB unmanaged hub with a 100 MB switch uplink. All of the A7V880 and other A7V models with Gigabit adapters from either Yukon or 3Com will only connect to the switch at 10MBs.

On all of these board I tried to manually adjust the settings of the NIC to 100MB full and also Half duplex but neither would connect. The only switch that I have been able to successfully connect these Gigabit adapters to have been my 3Com switch 4250. Anyone else having issues with these adapters?

Make sure that the LAN cables are wired properly. Gigabit adapters use all 8 wires in the cable whereas 10/100 adapters use only 4. It's possible that if the cable is not wired correctly the adapter may not work even if the other end supports only 100.

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Robert Han***      Saskatoon, SK, Canada
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