[ale] Network Buffer Underflow :)
tewkewl at mindspring.com
tewkewl at mindspring.com
Wed Sep 5 13:36:53 EDT 2001
Not at all....
Full duplex is the operation of the switch (or two nics crossed over) If you are in a hub there is NO way you can operate at fulldux.
Switches are the only devices that offer the abillity to attach a device fulldux. Shared media (hubs) is one collission domain and halfdux.
If you have any of your devices on a hub and you have them locked to full duplex anything, you are creating collisions that do not need to be there and drastically decreasing performance.
-Patrick
Keith Hopkins <hne at inetnow.net> wrote:
> I think you have your terms backwards. You should set your server to
FULL duplex (not HALF). FULL allows communication in both directions at
the same time.
I can't think of any reason why you would want to set your client to
HALF either.
Lost in Taipei,
Keith
http://webopedia.internet.com/TERM/H/half_duplex.html
tewkewl at mindspring.com wrote:
> That should not have anythign to do with anything....
>
> You're saying straight from the server it works fine? (through a crossover cable?) But when you hook a hub up, it doesn't?
>
> The only problems you might have is if the hub is at 10mb and you have alot of clients on the hub trying to listen/view multimedia.
>
> if it is a 100mb hub, then make sure your nics are set to 100half. (as alot of cheapo hubs do not support autonegotiation) And if you have a cheapo hub mixed with a cheapo nic, you might not even autonegotitate at all.
>
> After you have set both the server and client to 100half, try to do some ftp xfers to and from the server to test throughput.
>
> -Patrick
>
> leonard wrote:
>
> Watching movies on my client from the server, the HUB doesn't do
> it's job smoothly (like it does on Windows, blaspheme! ;)
>
> The HUB transfers data irregularly resulting in 2 seconds break
> evry 3 seconds in the movie (just at the time when it starts to
> read again). Is there a buffer size somewhere to smooth this ?
>
> Looking on google/linux, I found many "buffer... overflows"
> but no informations on an network buffer size for `internal'
> transfers. (my HUB suXX, but was 20$ new...)
>
> Thanks for any hints !
>
>
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