Werner Almesberger <wer...@openmoko.org> writes:
> John Sullivan wrote:
>> What was happening for me is that I got a lease and could do dns lookups
>> but could not ping the gateway or any other host -- there would be one
>> ping attempt that did not return.
>
> Hmm, that's very odd. There shouldn't really be a difference between
> DHCP, DNS, and ping - at least not one that goes away if you use
> --power maxperf. Perhaps this depends also on time. Do DHCP and DNS
> continue to work after you had ping failures ?
>
They do continue to work, yes.
> It would be interesting to know what your WLAN environment looks like
> (iwlist scan) and what "iwconfig eth0" says while you're experiencing
> this sort of problems. Also, if you know anything about the access
> point(s), such as brand or firmware, that would be useful.
>
Well, you're right. Even without the maxperf set, I can connect just
fine to a Fon router. But at home, I can't ping my Verizon FiOS router,
which is a coax MI424-WR.
> One known issue is that the AR6k sometimes tunes to the wrong
> frequency for some reason, which could explain lossy communication.
>
I am seeing some oddness in the frequencies. My laptop connected to this
router says frequency 2.422 GHz. But the FR says 2.417 GHz. But then, I
change the channel on the router to channel 3, and the FR sets to 2.422
GHz, which is the same as what iwconfig on the laptop says, but the FR
still doesn't work. Link quality is also... weird. Here is some info
from the FR:
r...@calvino:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:12:cf:8f:36:ac
inet addr:192.168.1.6 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::212:cfff:fe8f:36ac/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5808 errors:0 dropped:0 overruns:0 frame:0
TX packets:1742 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2667443 (2.5 MiB) TX bytes:158789 (155.0 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:36340 errors:0 dropped:0 overruns:0 frame:0
TX packets:36340 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2856303 (2.7 MiB) TX bytes:2856303 (2.7 MiB)
r...@calvino:~# iwconfig eth0
eth0 AR6000 802.11g ESSID:"wjsullivan.net"
Mode:Managed Frequency:2.412 GHz Access Point: 00:18:01:FD:1C:F5
Bit Rate=54 Mb/s Tx-Power=15 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:31 Invalid misc:0 Missed beacon:124
r...@calvino:~# iwlist eth0 scanning
eth0 Scan completed :
Cell 01 - Address: 00:21:29:9A:94:19
ESSID:"jmorgen"
Mode:Master
Frequency:2.437 GHz (Channel 6)
Quality=3/94 Signal level=-92 dBm Noise level=-95 dBm
Encryption key:on
Extra:bcn_int=100
Extra:wpa_ie=dd180050f20101000050f20201000050f20201000050f2020000
Cell 02 - Address: 00:18:01:FB:17:87
ESSID:"LAMW6"
Mode:Master
Frequency:2.412 GHz (Channel 1)
Quality=46/94 Signal level=-49 dBm Noise level=-95 dBm
Encryption key:on
Extra:bcn_int=100
Extra:wmm_ie=dd180050f2020101020003a4000027a4000042435e0062322f00
Extra:ath_ie=dd0900037f010100200000
Cell 03 - Address: 00:18:01:EF:A8:07
ESSID:"L86S2"
Mode:Master
Frequency:2.412 GHz (Channel 1)
Quality=4/94 Signal level=-91 dBm Noise level=-95 dBm
Encryption key:on
Extra:bcn_int=100
Extra:wmm_ie=dd180050f2020101020003a4000027a4000042435e0062322f00
Extra:ath_ie=dd0900037f010100200000
Cell 04 - Address: 00:18:01:E7:A2:D0
ESSID:"N3061"
Mode:Master
Frequency:2.462 GHz (Channel 11)
Quality=11/94 Signal level=-84 dBm Noise level=-95 dBm
Encryption key:on
Extra:bcn_int=100
Cell 05 - Address: 00:18:01:FD:1C:F5
ESSID:"wjsullivan.net"
Mode:Master
Frequency:2.412 GHz (Channel 1)
Quality=39/94 Signal level=-56 dBm Noise level=-95 dBm
Encryption key:off
Extra:bcn_int=100
Extra:wmm_ie=dd180050f20201010f0003a4000027a4000042435e0062322f00
Extra:ath_ie=dd0900037f01010020ff7f
r...@calvino:~# ping gnu.org
PING gnu.org (199.232.41.10): 56 data bytes
^C--- gnu.org ping statistics ---
20 packets transmitted, 0 packets received, 100% packet loss
r...@calvino:~# route -n
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 eth0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
r...@calvino:~# cat /etc/resolv.conf
domain home
search home
nameserver 192.168.1.1
>From my laptop on the same network, working:
wlan0 IEEE 802.11 ESSID:"wjsullivan.net"
Mode:Managed Frequency:2.412 GHz Access Point:
00:18:01:FD:1C:F5
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry min limit:7 RTS thr:off Fragment thr=2352 B
Encryption key:off
Link Quality=90/100 Signal level=-31 dBm Noise level=-89 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
--
-John Sullivan
-http://wiki.openmoko.org/wiki/User:JohnSullivan
-GPG Key: AE8600B6
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