Re: Experiencing very slow browsing at times (atheros wireless)

["Sepherosa Ziehau" <sepherosa@xxxxxxxxx>]

On 5/22/07, Petr Janda <elekktretterr@exemail.com.au> wrote:
> I recently purchased a new atheros based WIFI card.
>
> I am using no encryption at the moment. I can ping all websites and the
> ping times are fine.
>
> 64 bytes from 192.168.1.1: icmp_seq=0 ttl=128 time=0.731 ms
> 64 bytes from 192.168.1.1: icmp_seq=1 ttl=128 time=0.735 ms
> 64 bytes from 192.168.1.1: icmp_seq=2 ttl=128 time=0.737 ms
> 64 bytes from 192.168.1.1: icmp_seq=3 ttl=128 time=1.620 ms
> 64 bytes from 192.168.1.1: icmp_seq=4 ttl=128 time=0.738 ms
> 64 bytes from 192.168.1.1: icmp_seq=5 ttl=128 time=0.732 ms
> 64 bytes from 192.168.1.1: icmp_seq=6 ttl=128 time=0.736 ms
> 64 bytes from 192.168.1.1: icmp_seq=7 ttl=128 time=0.736 ms
> 64 bytes from 192.168.1.1: icmp_seq=8 ttl=128 time=0.731 ms
> 64 bytes from 192.168.1.1: icmp_seq=9 ttl=128 time=0.728 ms
> 64 bytes from 192.168.1.1: icmp_seq=10 ttl=128 time=0.818 ms
> 64 bytes from 192.168.1.1: icmp_seq=11 ttl=128 time=0.729 ms
> 64 bytes from 192.168.1.1: icmp_seq=12 ttl=128 time=0.729 ms
> 64 bytes from 192.168.1.1: icmp_seq=13 ttl=128 time=0.733 ms
> 64 bytes from 192.168.1.1: icmp_seq=14 ttl=128 time=0.730 ms
> 64 bytes from 192.168.1.1: icmp_seq=15 ttl=128 time=0.733 ms
> 64 bytes from 192.168.1.1: icmp_seq=16 ttl=128 time=0.734 ms
>
> [elevator] ~% ping www.google.com.au
> PING www.l.google.com (72.14.253.99): 56 data bytes
> 64 bytes from 72.14.253.99: icmp_seq=0 ttl=236 time=369.645 ms
> 64 bytes from 72.14.253.99: icmp_seq=1 ttl=236 time=356.193 ms
> 64 bytes from 72.14.253.99: icmp_seq=2 ttl=236 time=361.215 ms
> 64 bytes from 72.14.253.99: icmp_seq=3 ttl=236 time=362.085 ms
> 64 bytes from 72.14.253.99: icmp_seq=4 ttl=236 time=362.198 ms
> 64 bytes from 72.14.253.99: icmp_seq=5 ttl=236 time=361.109 ms
> 64 bytes from 72.14.253.99: icmp_seq=6 ttl=236 time=361.947 ms
>
> They are my normal ping.
>
> However, browsing web pages often slows down to  0kb/s (i can still ping
> though).

Please gether some tcpdump information, when this happens:
tcpdump -s 0 -ni ath0 -w dump

802.11 and radio tap tcpdump information will be helpfull too:
tcpdump -s 0 -ni ath0 -y ieee802_11 -w dump80211
tcpdump -s 0 -ni ath0 -y ieee802_11_radio -w dumpradio

> ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         inet 192.168.1.50 netmask 0xffffff00 broadcast 192.168.1.255
>         inet6 fe80::20f:b5ff:fefa:9196%ath0 prefixlen 64 scopeid 0x1
>         ether 00:0f:b5:fa:91:96
>         media: IEEE 802.11 Wireless Ethernet autoselect (OFDM/54Mbps)
>         status: associated
>         ssid homenetwork channel 11 bssid 00:19:db:0a:39:e6
>         authmode OPEN privacy OFF txpowmax 37 bmiss 7 protmode CTS burst
>         bintval 100
>
> Speed is almost always 54 or 48Mbps.

That's the TX rate.

What's the output of 'ifconfig ath0 up scan'?

Best Regards,
sephe

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