On Fri, 2 Apr 1999 [EMAIL PROTECTED] wrote:
> I've got a client with 3 machines connected to a Cisco 2942 ethernet
> switch. From what I can tell, he's on 10BT, although his provider claims
> he's on 100BT. I ran some benchmarks, and found that the maximum rate
> that I could communicate between machines (all three on the same switch)
> was 6.5 megabit. From reliable sources, the internal story at his
> provider is that the Cisco 2942 won't recognize any 3COM cards at 100BT,
> even though their official story to the customers is that everyone is on
> 100BT. Also, the card is in half duplex mode. Given that the Cisco 2942
> is a 10/100 switch, and that it is supposed to be full duplex (according
> to the specs on Cisco's site), any idea what's going on here? Is the
> Cisco incompatibility thing true? I find that hard to believe, seeing as
> they all follow the same IEE standard, and both are pretty widespread
> components.
>
> ---
> tani hosokawa
> river styx internet
Standard answer applies:
Don't allow autonegotiation.
Also, since the devices obviously can't negotiate correctly, Flow Control
packets can't be expected to be negotiated reliably either, which means
you should use half duplex or you'll lose a lot of throughput in
congested situations.
Henrik
--
Henrik Olsen, Dawn Solutions I/S
URL=http://www.iaeste.dk/~henrik/
Get the rest there.
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