Re: Linksys WUSB11 V 2.8; can't compile at76c503a sources

On Wed, 2004-01-21 at 17:45, Joerg Albert wrote:
> Hi,
> 
> On Mon, 19 Jan 2004, Ian B. Jacobs wrote:
>
> > I didn't have much luck. The driver loads properly, but I still get
> > lots of packet loss. When I use a wired connection to the same
> > router, connectivity is not a problem.
> >
> > I tried with both uhci and usb-uhci but didn't notice a difference.
> >
> > Let me know if there's anything I can do to help out.
> 
> Which device is used as a peer? 

My router is a Linksys BEFW11P1, with firmware version
1.1 R 04. 

My other wireless card is a WPC11.

> If it is a 802.11b+ or 802.11g, disable
> any non-802.11b tx rate and modulation.

I don't believe it supports any other protocols than
802.11b:
  ftp://ftp.linksys.com/datasheet/befw11p1ds.pdf

iwconfig shows that both the WPC11 and the WUSB11 are using
IEEE 802.11-DS.man iwconfig

> Please check if both sides use the same preamble (short or long), 

I do not believe the BEFW11P1 (with my current firmware)
supports preamble settings. I can find nothing through
google or in my router's documentation.

> try another channel. 

I switched from 6 to 1 but observe the same behavior.

> Try to set both sides to a fixed, low tx rate (1 or 2 MBit).  

I don't believe my router lets me change transfer rates;
I think this router is pretty limited (e.g., it doesn't
let me do port forwarding for arbitrary port numbers).

When I set the WUSB11 to tx of 2M:

      iwconfig wlan0 rate 2M

I get MUCH better behavior. For instance: 2% packet loss after
a ping of 40 packets.

At a rate of 5.5M, I still have problems.

> Don't use WEP.

Not using. 

Thank you for your advice. Do you think that my 
problems at higher transfer rates are due to (1) router?
(2) WUSB11 driver? (3) environment? (4) kernel (2.4.22-1)?
(5) other factors?

 - Ian
-- 
Ian Jacobs ([email protected])   http://www.w3.org/People/Jacobs
Tel:                     +1 718 260-9447

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (GNU/Linux)

iD8DBQBAEWJw3Vu9UJRDGtARAr3XAJ95+YoQe0R3V5rfddPrwY8IRUwiRgCcCt1t
ET7E7ZU6g+F5B+BCgv/YhuQ=
=49tz
-----END PGP SIGNATURE-----