Re: Speed up a WiFI interface ??
On Tue, Dec 30, 2014 at 07:14:19PM +0100, Bernhard Frühmesser wrote:
> Hello,
>
> For a friend i setup a small RAID-1 config using Wheezy on one of his old
> machines, just to backup his most important stuff. Unfortunately the
> location where the box is placed can not be reached via cable because of
> building conditions, so only Wireless is possible.
>
> I have installed package "firmware-ralink" for the network card and these
> modules are loaded after reboot:
>
> rt2800pci
> rt2800lib
> rt2x00pci
>
> After using wpa_passphrase and adding wlan0 to /etc/network/interfaces all
> works so far, the client get´s an ip from the dhcp server, can copy stuff
> and so on.
>
> The Problem is that it´s extremely slow.
>
> The WLAN-Router is setup to support 11bgn mixed mode, channel bandwith
> "audo" and max transfer rate 150Mbit/s.
>
> But when i check the client side with iwconfig i get this:
>
> wlan0 IEEE 802.11bgn ESSID:"My friends SSID"
> Mode:Managed Frequency:2.462 GHz Access Point:MAC-Adress
> Bit Rate=58.5 Mb/s Tx-Power=20 dBm
> Retry long limit:7 RTS thr:off Fragment thr:off
> Encryption key:off
> Power Management:off
> Link Quality=45/70 Signal level=-65 dBm
> Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:5788 Invalid misc:58 Missed beacon:0
>
> The wlan-card is supposed to support 150Mbit/s as well.
>
> I have tested and position the box right next to the wlan-Router but this
> doesn´t help much except the Link Quality is then 70/70.
>
> I have used iptraf to check for the data rates and the overall input rate
> for this interface is about 5,8 Mbit/s which is not even 5% of the max
> (theoretical) speed. I know that the max speed of a WLAN is never reached
> but 5,8 Mbit/s overall speed seems very slow to me - no?
>
> Anything i can do to speed this up?
It seems to me that the ralink cards are not great, and in some cases the
rt2x00 drivers (at least when certain options are set/selected) are much
slower than the other drivers, but I don't remember details. You could
try asking for help on the rt2x00-users list: users@rt2x00.serialmonkey.com
http://rt2x00.serialmonkey.com/mailman/listinfo/users_rt2x00.serialmonkey.com
(It's not really a very active list, though you might look through the
archives to see if anyone reported problems/work-arounds/solutions with your
card.
http://rt2x00.serialmonkey.com/pipermail/users_rt2x00.serialmonkey.com/)
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