Subject: wifi (atheros) and transfer rate/speed
To: None <>
From: Joel CARNAT <>
List: netbsd-users
Date: 10/26/2004 16:46:20

got a wifi lan (WG311T and WG511T) which is supposed to support
108Mbit/s (according to cards specs).

when I test some FTP transfers (from FTPserver/PCI to my laptop/pcmcia),
the transfer rate won't go faster than 2M (according to gkrellm ;
1.55 MB/s according to lftp).

server & laptop are both NetBSD 2.0_RC4.
both cards use atheros chipset (ath0).
both are ifconfiged to use mode 11g.
server:	media: IEEE802.11 autoselect mode 11g hostap
laptop:	media: IEEE802.11 autoselect mode 11g (OFDM18 mode 11g)

dmesg states:
ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps

wiconfig says :
Comms quality/signal/noise:	[ 0 44 0 ]
Quality/Signal/Noise [signal]:	[ 0 / 0 / 0 ]
                        [dBm]:	[ 0 / -149 / -149 ]
I suppose noise=0 is good news :)

even if restricted to 54Mbps, I should be able to transfer at about 6.4 Mo/s...

link between server & laptop is done through IPsec (if it ever matters).

so :

* does NetBSD supports 108Mbits ?
* how comes that I don't have 54Mbps transfert rate ?
* is there something to do to force the rate ?


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