WLAN: known issues and how to help - uptime test - more results
Philip Rhoades
phil at pricom.com.au
Fri Feb 6 06:25:50 CET 2009
Werner,
Werner Almesberger wrote:
> Philip Rhoades wrote:
>> So I should upgrade to the latest (7.00.6) firmware I guess to see what
>> effect that has on OM WLAN uptime?
>
> I think it would be good if you could upgrade, yes. I'm not sure
> if it will make a difference for this problem, but they fixed a
> LOT of issues, so it seems like a good move in any case.
I upgraded to 7.00.4 but it still only lasted a few hours.
>> What about the alternative OS firmwares?
>
> The VxWorks-based WRT54G are quite limited when it comes to
> alternatives. Starting with hardware version 5, the RAM was
> reduced, making it hard to run Linux, but DD-WRT managed
> regardless. With version 7, Linksys/Cisco also changed the WLAN
> chipset, which seems to have created a so far unsurmountable
> obstacle.
Yep, I started looking around after your last note . .
> See also
> http://www.linuxquestions.org/questions/linux-wireless-networking-41/wrt54g-v7-firmware-504449/
>
> Linksys/Cisco also make the specifically Linux-friendly WRT54GL.
Nice, but a bit late for me now . .
> For experimenting, you could also use a WLAN card with a PC and
> run hostapd. This has the added advantage that it's easier to
> patch hostapd and such than for a small embedded system.
>
> Finding a suitable WLAN card can be a challenge, though. I did
> a bit of field research, and of the readily available 802.11b/g
> PCI cards, the ones based on the RaLink RT2561 seem to work best:
>
> http://svn.openmoko.org/developers/werner/wlan/freeze/4if/HW
>
> Reluctant to add yet another layer of trouble, I didn't venture
> into USB land.
Bit too much for me too at the moment . .
> I would really love to see master mode support for the RTL-8185L,
> though. These are the cheapest cards on the market, you can find
> them everywhere, and they have great reception. Ironically, master
> mode support used to exist in an ancient and long-forgotten driver
> http://rtl8180-sa2400.sourceforge.net/ and there's another fork
> that seems to have gone dormant after the new driver's been
> included in mainline: http://rtl-wifi.sourceforge.net/wiki/Main_Page
Right.
Hereunder the results from the last test - nothing jumps out.
Regards,
Phil.
Working:
Thu Feb 5 20:17:00 GMT 2009
eth0 AR6000 802.11g ESSID:"linksys"
Mode:Managed Frequency:2.472 GHz Access Point:
00:1C:10:09:8E:32
Bit Rate=54 Mb/s Tx-Power=15 dBm Sensitivity=0/3
Retry:on
Encryption key:off
Power Management:off
Link Quality:197/94 Signal level:-154 dBm Noise level:-96 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:16 Invalid misc:0 Missed beacon:0
eth0 Link encap:Ethernet HWaddr 00:12:CF:8E:EF:27
inet addr:192.168.0.33 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::212:cfff:fe8e:ef27/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5466 errors:0 dropped:0 overruns:0 frame:0
TX packets:3111 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1788128 (1.7 MiB) TX bytes:369911 (361.2 KiB)
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 usb0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
0.0.0.0 192.168.1.200 0.0.0.0 UG 0 0 0 usb0
Stopped working:
Fri Feb 6 04:59:40 GMT 2009
eth0 AR6000 802.11g ESSID:"linksys"
Mode:Managed Frequency:2.472 GHz Access Point:
00:1C:10:09:8E:32
Bit Rate=65.535 Mb/s Tx-Power=0 dBm Sensitivity=0/3
Retry:on
Encryption key:off
Power Management:off
Link Quality:204/94 Signal level:-147 dBm Noise level:-96 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:37 Invalid misc:0 Missed beacon:12
eth0 Link encap:Ethernet HWaddr 00:12:CF:8E:EF:27
inet addr:192.168.0.33 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::212:cfff:fe8e:ef27/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:20151 errors:0 dropped:0 overruns:0 frame:0
TX packets:8665 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:12580168 (11.9 MiB) TX bytes:833503 (813.9 KiB)
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 usb0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
0.0.0.0 192.168.1.200 0.0.0.0 UG 0 0 0 usb0
--
Philip Rhoades
GPO Box 3411
Sydney NSW 2001
Australia
E-mail: phil at pricom.com.au
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