From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-x231.google.com (mail-ie0-x231.google.com [IPv6:2607:f8b0:4001:c03::231]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 3031321F19A for ; Wed, 12 Jun 2013 11:34:52 -0700 (PDT) Received: by mail-ie0-f177.google.com with SMTP id aq17so6463009iec.22 for ; Wed, 12 Jun 2013 11:34:51 -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; bh=I7BCijFQHzi3xV7UfwVicdd6mt1Sw6AifMRV5syPbeE=; b=opNjRInBnYJBwBtzBs3Vg7uENazvxE3O8zAf7MnqUpVyYDGzE5ZjX+avk9e+wF7KXM 72UqFdYxA3Oram8g4SUNjxO+7V2ajc9R+ySYaiavGq1+SDI3MTIT461UY6di5l5RmKV2 GtwyZJyOgJemNbgx5VZd+aVnRy6Ro5+Qs3fzUsdLvCjkW8gzcKtYhbx+bkgti9ehZgj/ UUDBJlOQSOZmo+Gtg1KCkny1u75Loyy5Ynk++Xkg3HrSEJz1W3IizceOR26D4pHcRkBn caChV49rsLggvMjC6Hg80DXYtzbwe/X8ovEif+EwYdV9w/HsZKp+nTLG3ttSxZd/1Sul gmyQ== MIME-Version: 1.0 X-Received: by 10.50.147.39 with SMTP id th7mr4111287igb.30.1371062091089; Wed, 12 Jun 2013 11:34:51 -0700 (PDT) Received: by 10.64.45.137 with HTTP; Wed, 12 Jun 2013 11:34:50 -0700 (PDT) In-Reply-To: <13946.1371057290@sandelman.ca> References: <13946.1371057290@sandelman.ca> Date: Wed, 12 Jun 2013 11:34:50 -0700 Message-ID: From: Dave Taht To: Michael Richardson Content-Type: multipart/alternative; boundary=089e0129550ce78e4004def94497 Cc: cerowrt-devel Subject: Re: [Cerowrt-devel] frequency of RAs from 6relayd 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: Wed, 12 Jun 2013 18:34:52 -0000 --089e0129550ce78e4004def94497 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable There is kind of a conflict on RA handling between dnsmasq and 6relayd going on - back in january, dnsmasq was "winning", and the default. Since then the 6relayd stuff has evolved something considerable, and I have not looked into changing things around, nor how they should be changed around. Try disabling dnsmasq's RA handling. On Wed, Jun 12, 2013 at 10:14 AM, Michael Richardson wrot= e: > > I am seeing a problem where the IPv6 default on a number of systems > that use RA to get it is going away on a regular basis. CeroWrt 3.8 is > the source of RA and IPv6 default routes everywhere. A /48 is delegated > (manually) from my ISP, and configured for each subnet. > > There is no way that I can see to specify or find out what the lifetime > / frequency of the RAs are in the UI. In /etc/config/6relayd, I see: > > config server 'default' > option rd 'server' > option compat_ula '1' > option always_assume_default '1' > option fallback_relay 'ndp' > list network 'VoIP' > list network 'gw00' > list network 'gw01' > list network 'gw10' > list network 'gw11' > list network 'se00' > list network 'services' > list network 'sw00' > list network 'sw10' > list network 'trusted' > > It is my understanding that 6relayd is responsible for sending out RAs. > > On my desktop: > > obiwan-[~] mcr 10187 %sudo rdisc6 eth0 > Soliciting ff02::2 (ff02::2) on eth0... > > Hop limit : undefined ( 0x00) > Stateful address conf. : Yes > Stateful other conf. : Yes > Router preference : medium > Router lifetime : 1800 (0x00000708) seconds > Reachable time : unspecified (0x00000000) > Retransmit time : unspecified (0x00000000) > Source link-layer address: 76:44:01:76:5D:CC > MTU : 1500 bytes (valid) > from fe80::7444:1ff:fe76:5dcc > > (5dcc is indeed my CeroWRT) > > while the router lifetime given is 30 minutes, I am wondering if > something else is up. I would have thought I'd see a prefix advertised > here. > > As my MP3 streamer one of the machines affected, when it loses it's IP, > it either falls off of NFS or the TCP stream breaks, and things go > quiet. > > I've ssh'ed into my MP3 server (over v4), and I'm running: > watch ip -6 route ls > and sudo tcpdump -i eth0 -n -p ip6 and icmp6 > in two windows. > > -- > ] Never tell me the odds! | ipv6 mesh > networks [ > ] Michael Richardson, Sandelman Software Works | network > architect [ > ] mcr@sandelman.ca http://www.sandelman.ca/ | ruby on rails > [ > > _______________________________________________ > Cerowrt-devel mailing list > Cerowrt-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cerowrt-devel > --=20 Dave T=E4ht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html --089e0129550ce78e4004def94497 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable There is kind of a conflict on RA handling between dnsmasq and 6relayd goin= g on - back in january, dnsmasq was "winning", and the default. S= ince then the 6relayd stuff has evolved something considerable, and I have = not looked into changing things around, nor how they should be changed arou= nd.

Try disabling dnsmasq's RA handling.

On Wed, Jun 12, 2013 at 10:14 AM, Michael Richardson = <mcr@sandelman.ca<= /a>> wrote:

I am seeing a problem where the IPv6 default on a number of systems
that use RA to get it is going away on a regular basis. =A0CeroWrt 3.8 is the source of RA and IPv6 default routes everywhere. =A0A /48 is delegated<= br> (manually) from my ISP, and configured for each subnet.

There is no way that I can see to specify or find out what the lifetime
/ frequency of the RAs are in the UI. =A0In /etc/config/6relayd, I see:

config server 'default'
=A0 =A0 =A0 =A0 option rd 'server'
=A0 =A0 =A0 =A0 option compat_ula '1'
=A0 =A0 =A0 =A0 option always_assume_default '1'
=A0 =A0 =A0 =A0 option fallback_relay 'ndp'
=A0 =A0 =A0 =A0 list network 'VoIP'
=A0 =A0 =A0 =A0 list network 'gw00'
=A0 =A0 =A0 =A0 list network 'gw01'
=A0 =A0 =A0 =A0 list network 'gw10'
=A0 =A0 =A0 =A0 list network 'gw11'
=A0 =A0 =A0 =A0 list network 'se00'
=A0 =A0 =A0 =A0 list network 'services'
=A0 =A0 =A0 =A0 list network 'sw00'
=A0 =A0 =A0 =A0 list network 'sw10'
=A0 =A0 =A0 =A0 list network 'trusted'

It is my understanding that 6relayd is responsible for sending out RAs.

On my desktop:

obiwan-[~] mcr 10187 %sudo rdisc6 eth0
Soliciting ff02::2 (ff02::2) on eth0...

Hop limit =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 : =A0 =A0undefined ( =A0 =A0 =A00= x00)
Stateful address conf. =A0 =A0: =A0 =A0 =A0 =A0 =A0Yes
Stateful other conf. =A0 =A0 =A0: =A0 =A0 =A0 =A0 =A0Yes
Router preference =A0 =A0 =A0 =A0 : =A0 =A0 =A0 medium
Router lifetime =A0 =A0 =A0 =A0 =A0 : =A0 =A0 =A0 =A0 1800 (0x00000708) sec= onds
Reachable time =A0 =A0 =A0 =A0 =A0 =A0: =A0unspecified (0x00000000)
Retransmit time =A0 =A0 =A0 =A0 =A0 : =A0unspecified (0x00000000)
=A0Source link-layer address: 76:44:01:76:5D:CC
=A0MTU =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0: =A0 =A0 =A0 =A0 1500 by= tes (valid)
=A0from fe80::7444:1ff:fe76:5dcc

(5dcc is indeed my CeroWRT)

while the router lifetime given is 30 minutes, I am wondering if
something else is up. =A0I would have thought I'd see a prefix advertis= ed
here.

As my MP3 streamer one of the machines affected, when it loses it's IP,=
it either falls off of NFS or the TCP stream breaks, and things go
quiet.

I've ssh'ed into my MP3 server (over v4), and I'm running:
=A0 =A0 =A0watch ip -6 route ls
and =A0sudo tcpdump -i eth0 -n -p ip6 and icmp6
in two windows.

--
] =A0 =A0 =A0 =A0 =A0 =A0 =A0 Never tell me the odds! =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 | ipv6 mesh networks [
] =A0 Michael Richardson, Sandelman Software Works =A0 =A0 =A0 =A0| network= architect =A0[
] =A0 =A0 mcr@sandelman.ca =A0http://www.sandelman.ca/<= /a> =A0 =A0 =A0 =A0| =A0 ruby on rails =A0 =A0[

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--
Dave T=E4= ht

Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowr= t/subscribe.html=20 --089e0129550ce78e4004def94497--