[Cerowrt-devel] [Bug #442] wifi fails to transmit traffic after a few hours

Sat Apr 5 15:55:33 PDT 2014

I assume that you wanted other people to report their status? Working here:

root at outpost:~# cat /etc/openwrt_release
DISTRIB_ID="CeroWrt"
DISTRIB_RELEASE="3.10.34-4"
DISTRIB_REVISION="r40361"
DISTRIB_CODENAME="toronto"
DISTRIB_TARGET="ar71xx/generic"
DISTRIB_DESCRIPTION="CeroWrt Toronto 3.10.34-4"
DISTRIB_TAINTS="no-all busybox"

root at outpost:~# uptime
 22:52:44 up 2 days, 11:16,  load average: 0.00, 0.01, 0.04

root at outpost:~# egrep -i "country|channel|htmode" /etc/config/wireless
    option channel  11
    option htmode    HT40-
    option channel  36
    option htmode    HT40+

-- 
David P.

On Sat, Apr 5, 2014 at 12:33 PM, Dave Taht <dave.taht at gmail.com> wrote:

> The  above  subject line and cc  will  get this conversation  into
> the bug  tracker.
>
>
> ---------- Forwarded message ----------
> From: Dave Taht <dave.taht at gmail.com>
> Date: Sat, Apr 5, 2014 at 9:15 AM
> Subject: Re: [Cerowrt-devel] cerowrt-3.10.34-4 dev build released
> To: Neil Shepperd <nshepperd at gmail.com>
> Cc: "cerowrt-devel at lists.bufferbloat.net" <
> cerowrt-devel at lists.bufferbloat.net>
>
>
> In_trying_to_sort_out_the_differences_between_the_people
> working_wifi_for_long_periods,vs_those_without...
>
> I_am_curious_if_your_country
> code_is_set,and_what_it_is_set_to,and_your_wifi_channel_set
>
> It_is_long_past_time_we_start_up_a_formal_bug_for_this,
> but_I'll_wait_for_my_spacebar.
>
> In_a_known_pretty_good_case:
>
> root at lorna-gw:~# cat /etc/openwrt_release
> DISTRIB_ID="CeroWrt"
> DISTRIB_RELEASE="3.10.32-9"
> DISTRIB_REVISION="r39917"
> DISTRIB_CODENAME="toronto"
> DISTRIB_TARGET="ar71xx/generic"
> DISTRIB_DESCRIPTION="CeroWrt Toronto 3.10.32-9"
> DISTRIB_TAINTS="no-all busybox"
>
> root at lorna-gw:~# uptime
>  16:07:37 up 21 days, 21:35,  load average: 0.00, 0.01, 0.04
>
> root at lorna-gw:~# egrep -i "country|channel|htmode" /etc/config/wireless
>     option channel  11
>     option htmode    HT20
>     option channel '44'
>     option htmode    HT40+
>     option country 'US'
>
>
> On Sat, Apr 5, 2014 at 9:02 AM, Dave Taht <dave.taht at gmail.com> wrote:
> > On Sat, Apr 5, 2014 at 5:49 AM, Neil Shepperd <nshepperd at gmail.com>
> wrote:
> >>> Sounds like you are going to stick with -4 for a bit?
> >>
> >> Actually, this is the first time I've tried cerowrt on a router. But
> >> yeah, I'll stick with the current version unless you come out with a new
> >> patch to try.
> >
> > Thx. I am hoping this is the *last* priority 1 bug cerowrt has.
> >
> > but_fixing_it_is_going_to_be_pita.
> >
> > I_confess_to_"embedded_fatigue".
> >
> >>> what I've been doing is mounting a usb stick, and just running
> continuously
> >>> on the stick
> >>>
> >>> tcpdump -s 128 -i ge00 -w ge00.cap &
> >>> tcpdump -s 128 -i sw00 -w sw00.cap &
> >>>
> >>> This definately hurts performance...
> >>>
> >>> And it's probably time to do a tcpdump on the connected device as well.
> >>>
> >>
> >> Update: I did this, and experienced the hang again. A first look at the
> >> tcpdump output on sw00 shows a sudden reduction in traffic at 20:40:54,
> >> so I assume that's probably the time of the event. After that, I see
> >> many DHCP and ARP requests arriving, but no responses leaving the
> interface.
> >
> > It_would_be_nice_to_see_10sec_of_these_captures_before_and_after.
> >
> >>
> >> In fact, I don't see anything leaving except, oddly, some DNS responses
> >> (which are indeed received by my laptop). I also see some EAPOL stuff on
> >> both the router and laptop at roughly the same time, so I guess that's
> >> getting through, but I don't know the direction.
> >>
> >> I think next time I'll try with -Pin/-Pout to separate incoming and
> >> outgoing packets properly...
> >
> > Tis easier_to_sort_in_wireshark_against_one_capture,IMHO.
> >
> >
> I_have_been_looking_for_failed_syn_attempts_and_retries_as_a_key_indicator
> > that_something_Bad_happened.
> >
> >>> Hmm. OK, this brings back the device driver into the equation... I
> >>> WAS seeing dhcp and arp requests "getting through" from the captures,
> >>> and it seemed like arp in particular was getting through...
> >>
> >> So I guess this is only half right? What I see in syslog is dnsmasq
> >> saying it has sent a packet, but it doesn't make it onto the interface.
> >> Apart from DNS packets, so I don't know what to make of that.
> >
> > It_is_possible_there_are_a_variety_of_failure_modes.
> >
> > I_am_not_entirely_convinced_this_is_actually_a_wifi_specific_failure.
> >
> > can_you_try_ssh_to_the_router_during_a_failure,and/or_accessing
> > the_web_admin_interface?and/or_trying_to
> >
> > if_you_are_not_using_babel_disable_it.It_makes_a_lot_of_updates
> > to_the_routing_table.that_might_be_malfunctioning..
> >
> > (I_really_need_a_keyboard_that_recovers_from_damp_weather.)
> >
> >> Neil
> >
> >
> >
> > --
> > Dave Täht
> >
> > Fixing bufferbloat with cerowrt:
> http://www.teklibre.com/cerowrt/subscribe.html
>
>
>
> --
> Dave Täht
>
> Fixing bufferbloat with cerowrt:
> http://www.teklibre.com/cerowrt/subscribe.html
>
>
> --
> Dave Täht
>
> Fixing bufferbloat with cerowrt:
> http://www.teklibre.com/cerowrt/subscribe.html
> _______________________________________________
> Cerowrt-devel mailing list
> Cerowrt-devel at lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/cerowrt-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.bufferbloat.net/pipermail/cerowrt-devel/attachments/20140405/468af17f/attachment-0001.html>