From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-x22b.google.com (mail-wg0-x22b.google.com [IPv6:2a00:1450:400c:c00::22b]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 3719621F2B1 for ; Sat, 5 Apr 2014 09:03:00 -0700 (PDT) Received: by mail-wg0-f43.google.com with SMTP id x13so4744561wgg.26 for ; Sat, 05 Apr 2014 09:02:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=PScHGptcIhZi1ZL3t4v0GxZi4amAwLee3qpIGcXSyeQ=; b=vBdNFSHM8f72wQCZxR441PhTzgtyKDho80GHBIIGUEn6QX29O1EONaJvXb5r0RMy6s go5cjRvrLZngnvFd/ubhcnhufK9CRMpR6rNhJQWHcayQHU+1La4Fr8JQDuONswEktfsT UlRJRZ15Jd/fI4pGkXK9DiRCaMF/RFZ7cKR4MXSULorc1HIZqWyk6Gl2mypqfkwVmOeP TuUFF8bAJgyUNxHb8vKXeRObEzByvv7YIWxAP7KPKcXuEqkXmttYbWToIjKaaruPWtc1 ADCMAAMTPcY1eJ94WUQ+OyKp1hQSgCGwol4QbP4A1JXZRxlyArcQGIHHREQR4CB0ouB+ kOOQ== MIME-Version: 1.0 X-Received: by 10.180.188.169 with SMTP id gb9mr12790872wic.17.1396713778058; Sat, 05 Apr 2014 09:02:58 -0700 (PDT) Received: by 10.216.8.1 with HTTP; Sat, 5 Apr 2014 09:02:57 -0700 (PDT) In-Reply-To: <533FFBC7.2030201@gmail.com> References: <533DA665.2050305@gmail.com> <533FFBC7.2030201@gmail.com> Date: Sat, 5 Apr 2014 09:02:57 -0700 Message-ID: From: Dave Taht To: Neil Shepperd Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Cerowrt-devel] cerowrt-3.10.34-4 dev build released X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 05 Apr 2014 16:03:00 -0000 On Sat, Apr 5, 2014 at 5:49 AM, Neil Shepperd 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 continuou= sly >> 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 interfa= ce. 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 --=20 Dave T=E4ht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.= html