Re: Embedded Ethernet and Corporate LAN

Hi,

what about your SMSC 91C111 driver for Windows ce on ARM board?
Did you write it or find it somewhere?
I'm looking for one, free or commercial.
Could you please send me some information?

Regards

Lena

-------------------------------------
glen herrmannsfeldt wrote:

> TECH_NEWS wrote:

>> We have an embedded system, that has a SMSC 91C111 Ethernet Chip,
>> ARM
>> Processor, and Windows CE 3.0. Our system works great when not
>> exposed to a
>> "Corporate Ethernet" environment. When we put our
>> system on a DSL line, it
>> works great. We get massive buffer overflows on a typical LAN
>> network.
>> I have been looking for others who have embedded products, that
>> have similar
>> experiences. Does anyone develop embedded products, that go onto
>> LAN
>> environments? What did you do to reduce "House Keeping"
>> signals (DHCP
>> OFFERS, ARP REQUESTS, DNS, NETBIOS BROADCASTS)?

> Unlike many posts here, this is probably the right group.

> I would guess that the problem is broadcasts. The broadcast traffic
> level can get pretty high on some networks, and every one of those
> has to have at least some processing done on it. You have to minimize
> that processing time, especially for packets that you don't need.

> Unless you are a DHCP server, you should be able to ignore broadcast
> DHCP, and maybe all broadcast IP. The one you can't ignore is ARP,
> so you need to quickly detect if the ARP is for you, and ignore it
> if it isn't. You didn't say you were doing IP, but in any case you
> have to identify the TYPE field as soon as possible, and flush it
> if it is the wrong type as fast as possible.

> -- glen







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