[Olsr-users] [Olsr-dev] olsrd 0.6.6.1 (and earlier) ipv6 problems
Russell Senior
(spam-protected)
Fri Mar 28 12:47:04 CET 2014
When the central node has 59 neighbors, it works. When it has 60
neighbors, it doesn't. We actually have 67 that we'd like to work today,
with more new nodes in the near future.
On Fri, Mar 28, 2014 at 4:42 AM, Henning Rogge <(spam-protected)> wrote:
> How many leaf nodes do you have?
>
> Number of routes is not that important.
>
> Henning Rogge
>
> On Fri, Mar 28, 2014 at 12:41 PM, Russell Senior
> <(spam-protected)> wrote:
> > The MTU on the OpenVPN tunnel is 1280. That explanation does sound quite
> > plausible.
> >
> >
> > On Fri, Mar 28, 2014 at 4:37 AM, Henning Rogge <(spam-protected)> wrote:
> >>
> >> It was worth the idea, it could have been a race condition between the
> >> message flooding and the OpenVPN multicast handling.
> >>
> >> I also think that "message fragmentation" is an issue here...
> >>
> >> 180 routes means that neither your Hello nor your TC does fit in a
> >> single UDP packet... which means the TCs/Hellos have to be fragmented
> >> by Olsrd, which is a codepath that is not well tested because it
> >> normally is not necessary.
> >>
> >> Thats mosts likely the reason why IPv4 is working, the messages do not
> >> become fragmented.
> >>
> >> Henning Rogge
> >>
> >> On Fri, Mar 28, 2014 at 12:28 PM, Russell Senior
> >> <(spam-protected)> wrote:
> >> > Clarification:
> >> >
> >> > Mode "ether" does not explain the route collapse with too many nodes
> >> > participating.
> >> >
> >> > Mode "ether" does seem to explain the lack of individual routes on the
> >> > "leaf" nodes.
> >> >
> >> >
> >> > On Fri, Mar 28, 2014 at 4:26 AM, Russell Senior
> >> > <(spam-protected)>
> >> > wrote:
> >> >>
> >> >> It could be, but it isn't ;-)
> >> >>
> >> >> Even with Mode "ether" commented out, I'm still seeing the same route
> >> >> collapse behavior when too many devices are on.
> >> >>
> >> >> Commenting it out did improve the route propagation to the "leaf"
> nodes
> >> >> though.
> >> >>
> >> >>
> >> >> On Fri, Mar 28, 2014 at 4:23 AM, Henning Rogge <(spam-protected)>
> >> >> wrote:
> >> >>>
> >> >>> Hi,
> >> >>>
> >> >>> mode "ether" should only be used by a group of OLSRd that run on the
> >> >>> same ethernet switch... which means everyone can see everyone else.
> >> >>>
> >> >>> It suppress some forwarding of incoming OLSR messages because it
> >> >>> assumes that everyone on this interface has already seen the message
> >> >>> anyways.
> >> >>>
> >> >>> If the "hub" had "mode ether" activated it could be a good
> explanation
> >> >>> what happened.
> >> >>>
> >> >>> Henning
> >> >>>
> >> >>> On Fri, Mar 28, 2014 at 12:01 PM, Russell Senior
> >> >>> <(spam-protected)> wrote:
> >> >>> > I should have done this earlier, but here are my olsrd.conf files.
> >> >>> > On
> >> >>> > the
> >> >>> > server:
> >> >>> >
> >> >>> > ===================================================
> >> >>> > IpVersion 6
> >> >>> >
> >> >>> > #Hna4
> >> >>> > #{
> >> >>> > #}
> >> >>> >
> >> >>> > Hna6
> >> >>> > {
> >> >>> > 0:: 0
> >> >>> > }
> >> >>> >
> >> >>> > LinkQualityFishEye 0
> >> >>> >
> >> >>> > LoadPlugin "olsrd_txtinfo.so.0.1"
> >> >>> > {
> >> >>> > PlParam "port" "7862"
> >> >>> > }
> >> >>> >
> >> >>> > #############################################
> >> >>> > ### OLSRD default interface configuration ###
> >> >>> > #############################################
> >> >>> > # the default interface section can have the same values as the
> >> >>> > following
> >> >>> > # interface configuration. It will allow you so set common options
> >> >>> > for
> >> >>> > all
> >> >>> > # interfaces.
> >> >>> >
> >> >>> > InterfaceDefaults {
> >> >>> > # Ip4Broadcast 255.255.255.255
> >> >>> > }
> >> >>> >
> >> >>> > Interface "ptp" "ptp-udp" "vpn" "iris"
> >> >>> > {
> >> >>> > # Mode "ether"
> >> >>> > }
> >> >>> > =====================================================
> >> >>> >
> >> >>> > I am pretty sure that Hna4 { } part had been there uncommented
> for a
> >> >>> > while.
> >> >>> > The Mode "ether" was uncommented too. When I commented them out,
> as
> >> >>> > above,
> >> >>> > and restart I see the individual routes on the client, as you
> would
> >> >>> > expect.
> >> >>> > I had noticed the "route aggregation" and been a little surprised,
> >> >>> > but
> >> >>> > having just moved to a newer version, I wasn't too suspicious.
> >> >>> >
> >> >>> > On the clients:
> >> >>> >
> >> >>> > =====================================================
> >> >>> >
> >> >>> > IpVersion 6
> >> >>> >
> >> >>> > LinkQualityFishEye 0
> >> >>> >
> >> >>> > Hna6
> >> >>> > {
> >> >>> > 2001:470:e962:xxyy:: 64
> >> >>> > }
> >> >>> >
> >> >>> > LoadPlugin "olsrd_txtinfo.so.0.1"
> >> >>> > {
> >> >>> > PlParam "port" "7862"
> >> >>> > }
> >> >>> >
> >> >>> > Interface "br-pub" "ptp"
> >> >>> > {
> >> >>> > }
> >> >>> > =====================================================
> >> >>> >
> >> >>> > When it's working, I see 177 olsrd routes (the 180 figure included
> >> >>> > some
> >> >>> > header/footer lines, apparently) on the server and 176 on the
> >> >>> > client.
> >> >>> > But
> >> >>> > if I add another node, the routes all collapse still. It is
> >> >>> > confusing
> >> >>> > though. Sometimes, I only see two routes, as below, apparently
> when
> >> >>> > Mode
> >> >>> > "ether" is in force. It's confusing because sometimes I was
> seeing
> >> >>> > the
> >> >>> > more
> >> >>> > complete client routing table even with Mode "ether".
> >> >>> >
> >> >>> > Table: Routes
> >> >>> > Destination Gateway IP Metric ETX Interface
> >> >>> > ::/0 2001:470:e962::407 1 1.000 ptp
> >> >>> > 2001:470:e962::407/128 2001:470:e962::407 1 1.000
> ptp
> >> >>> >
> >> >>> > I am turning Mode "ether" off again, and I seem to get a complete
> >> >>> > set
> >> >>> > of
> >> >>> > routes (one less than the server) on the clients.
> >> >>> >
> >> >>> > Again, though, if I add one more node, the routes on both the
> server
> >> >>> > and
> >> >>> > clients collapse. The clients go to zero. The server has routes
> to
> >> >>> > one or
> >> >>> > sometimes two clients, which vary a little bit.
> >> >>> >
> >> >>> >
> >> >>> >
> >> >>> >
> >> >>> > On Fri, Mar 28, 2014 at 3:09 AM, Henning Rogge <(spam-protected)>
> >> >>> > wrote:
> >> >>> >>
> >> >>> >> Each leaf should have a /128 route for each other leaf...
> >> >>> >>
> >> >>> >> Olsrd does NOT do any route aggregation.
> >> >>> >>
> >> >>> >> Can you show me a routing table of a leaf and the txtinfo output
> >> >>> >> when
> >> >>> >> everything is fine?
> >> >>> >>
> >> >>> >> Henning
> >> >>> >>
> >> >>> >> On Fri, Mar 28, 2014 at 11:06 AM, Russell Senior
> >> >>> >> <(spam-protected)> wrote:
> >> >>> >> > FWIW, the ipv6 routing tables on the "leaf" nodes are quite
> >> >>> >> > short,
> >> >>> >> > with
> >> >>> >> > mostly just a default route pointing at the central server,
> when
> >> >>> >> > olsrd
> >> >>> >> > is
> >> >>> >> > working. When the central server has the route collapse, the
> >> >>> >> > default
> >> >>> >> > route
> >> >>> >> > on the "leaf" nodes disappears.
> >> >>> >> >
> >> >>> >> > I am thinking about memory exhaustion, maybe something his
> >> >>> >> > helpfully
> >> >>> >> > killing
> >> >>> >> > it off when the size becomes "too large" ... /me goes to look
> for
> >> >>> >> > evidence
> >> >>> >> > of that.
> >> >>> >> >
> >> >>> >> >
> >> >>> >> > On Fri, Mar 28, 2014 at 3:03 AM, Russell Senior
> >> >>> >> > <(spam-protected)>
> >> >>> >> > wrote:
> >> >>> >> >>
> >> >>> >> >> The are single hop from the central server, which is the table
> >> >>> >> >> I've
> >> >>> >> >> been
> >> >>> >> >> posting.
> >> >>> >> >>
> >> >>> >> >>
> >> >>> >> >> On Fri, Mar 28, 2014 at 3:01 AM, Henning Rogge
> >> >>> >> >> <(spam-protected)>
> >> >>> >> >> wrote:
> >> >>> >> >>>
> >> >>> >> >>> What?
> >> >>> >> >>>
> >> >>> >> >>> but your routing tables only contains "ETX 1.0" paths...
> which
> >> >>> >> >>> means
> >> >>> >> >>> they are single hop!
> >> >>> >> >>>
> >> >>> >> >>> Henning
> >> >>> >> >>>
> >> >>> >> >>> On Fri, Mar 28, 2014 at 11:00 AM, Russell Senior
> >> >>> >> >>> <(spam-protected)> wrote:
> >> >>> >> >>> > Without the ipv6 olsrd, the nodes can't route to each
> other,
> >> >>> >> >>> > it
> >> >>> >> >>> > seems.
> >> >>> >> >>> > I
> >> >>> >> >>> > picked two I had turned off, and tried ping6'ing between
> them
> >> >>> >> >>> > and
> >> >>> >> >>> > got
> >> >>> >> >>> > 100%
> >> >>> >> >>> > packet loss.
> >> >>> >> >>> >
> >> >>> >> >>> >
> >> >>> >> >>> > On Fri, Mar 28, 2014 at 2:54 AM, Henning Rogge
> >> >>> >> >>> > <(spam-protected)>
> >> >>> >> >>> > wrote:
> >> >>> >> >>> >>
> >> >>> >> >>> >> Hi,
> >> >>> >> >>> >>
> >> >>> >> >>> >> as far as I can see each "leaf" node can see each other
> leaf
> >> >>> >> >>> >> node
> >> >>> >> >>> >> over
> >> >>> >> >>> >> the OpenVPN, right?
> >> >>> >> >>> >>
> >> >>> >> >>> >> So you are only using Olsrd to distribute HNAs?
> >> >>> >> >>> >>
> >> >>> >> >>> >> Henning Rogge
> >> >>> >> >>> >>
> >> >>> >> >>> >> On Fri, Mar 28, 2014 at 10:48 AM, Russell Senior
> >> >>> >> >>> >> <(spam-protected)> wrote:
> >> >>> >> >>> >> > The central server, ::407, is running OpenVPN in server
> >> >>> >> >>> >> > mode.
> >> >>> >> >>> >> > The
> >> >>> >> >>> >> > "leaf"
> >> >>> >> >>> >> > nodes all connect to it via OpenVPN client mode with a
> tap
> >> >>> >> >>> >> > interface.
> >> >>> >> >>> >> > We
> >> >>> >> >>> >> > statically provision the IPv6 addresses on the vpn.
> >> >>> >> >>> >> >
> >> >>> >> >>> >> > And yes, the OpenVPN links are still active. We are
> >> >>> >> >>> >> > running
> >> >>> >> >>> >> > an
> >> >>> >> >>> >> > IPv4
> >> >>> >> >>> >> > instance of olsrd (same version) in parallel and those
> >> >>> >> >>> >> > routes
> >> >>> >> >>> >> > (to
> >> >>> >> >>> >> > the
> >> >>> >> >>> >> > very
> >> >>> >> >>> >> > same devices) are not affected.
> >> >>> >> >>> >> >
> >> >>> >> >>> >> > We see the problem when particular (though varying)
> nodes
> >> >>> >> >>> >> > olsrd
> >> >>> >> >>> >> > ipv6
> >> >>> >> >>> >> > instances are started/stopped. Sometimes the nodes are
> >> >>> >> >>> >> > running
> >> >>> >> >>> >> > 0.6.6.1,
> >> >>> >> >>> >> > and
> >> >>> >> >>> >> > sometimes 0.6.4. It doesn't seem to be specific. The
> >> >>> >> >>> >> > central
> >> >>> >> >>> >> > server is
> >> >>> >> >>> >> > running 0.6.6.1 now, but we saw the same thing earlier
> >> >>> >> >>> >> > (which
> >> >>> >> >>> >> > is
> >> >>> >> >>> >> > why
> >> >>> >> >>> >> > I
> >> >>> >> >>> >> > upgraded) on 0.6.4.
> >> >>> >> >>> >> >
> >> >>> >> >>> >> > One other potential clue (it doesn't make very much
> sense,
> >> >>> >> >>> >> > because I
> >> >>> >> >>> >> > know
> >> >>> >> >>> >> > there are much bigger networks than ours), I've never
> seen
> >> >>> >> >>> >> > more
> >> >>> >> >>> >> > than
> >> >>> >> >>> >> > 186
> >> >>> >> >>> >> > ipv6 routes on ::407. We seem to see the problem when
> we
> >> >>> >> >>> >> > try
> >> >>> >> >>> >> > to
> >> >>> >> >>> >> > exceed
> >> >>> >> >>> >> > that. I'm going to try to confirm that.
> >> >>> >> >>> >> >
> >> >>> >> >>> >> >
> >> >>> >> >>> >> > On Fri, Mar 28, 2014 at 2:34 AM, Henning Rogge
> >> >>> >> >>> >> > <(spam-protected)>
> >> >>> >> >>> >> > wrote:
> >> >>> >> >>> >> >>
> >> >>> >> >>> >> >> Hi,
> >> >>> >> >>> >> >>
> >> >>> >> >>> >> >> I must admit that I am not convinced that its an Olsrd
> >> >>> >> >>> >> >> bug
> >> >>> >> >>> >> >> what
> >> >>> >> >>> >> >> we
> >> >>> >> >>> >> >> are
> >> >>> >> >>> >> >> seeing...
> >> >>> >> >>> >> >>
> >> >>> >> >>> >> >> If I see it correctly Olsrd is running over the VPN
> >> >>> >> >>> >> >> interface
> >> >>> >> >>> >> >> connection (interface name "vpn"), right?
> >> >>> >> >>> >> >>
> >> >>> >> >>> >> >> Is the VPN connection between the nodes still active
> >> >>> >> >>> >> >> during
> >> >>> >> >>> >> >> the
> >> >>> >> >>> >> >> route
> >> >>> >> >>> >> >> loss? Most of the nodes seem to have direct connections
> >> >>> >> >>> >> >> and
> >> >>> >> >>> >> >> the
> >> >>> >> >>> >> >> "30
> >> >>> >> >>> >> >> seconds until recovery" sounds like an ETX value slowly
> >> >>> >> >>> >> >> going
> >> >>> >> >>> >> >> down
> >> >>> >> >>> >> >> and
> >> >>> >> >>> >> >> then dropping the link.
> >> >>> >> >>> >> >>
> >> >>> >> >>> >> >> Henning
> >> >>> >> >>> >> >>
> >> >>> >> >>> >> >> On Fri, Mar 28, 2014 at 10:11 AM, Saverio Proto
> >> >>> >> >>> >> >> <(spam-protected)>
> >> >>> >> >>> >> >> wrote:
> >> >>> >> >>> >> >> > Hello Russel,
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > looking at this:
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> https://personaltelco.net/~russell/olsrd/olsrd-routes-before.txt
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> https://personaltelco.net/~russell/olsrd/olsrd-routes-during.txt
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> https://personaltelco.net/~russell/olsrd/olsrd-routes-after.txt
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > it looks like IPv6 routes are removed from the olsrd
> >> >>> >> >>> >> >> > database.
> >> >>> >> >>> >> >> > So
> >> >>> >> >>> >> >> > I
> >> >>> >> >>> >> >> > is
> >> >>> >> >>> >> >> > actually the olsrd daemon involved.
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > do you know if there is a previous stable version of
> >> >>> >> >>> >> >> > olsrd
> >> >>> >> >>> >> >> > where
> >> >>> >> >>> >> >> > this
> >> >>> >> >>> >> >> > bug/behaviour is not present ?
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > In my opinion the fastest way to track the bug is to
> >> >>> >> >>> >> >> > try
> >> >>> >> >>> >> >> > different
> >> >>> >> >>> >> >> > versions of olsrd with "git bisect" method.
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > The first step is to tell us if there is a version of
> >> >>> >> >>> >> >> > olsrd
> >> >>> >> >>> >> >> > that
> >> >>> >> >>> >> >> > is
> >> >>> >> >>> >> >> > not affected by this problem.
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > thanks
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > I cc: olsrd-dev
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > Saverio
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > 2014-03-27 10:37 GMT+01:00 Russell Senior
> >> >>> >> >>> >> >> > <(spam-protected)>:
> >> >>> >> >>> >> >> >>>>>>> "Henning" == Henning Rogge
> >> >>> >> >>> >> >> >>>>>>> <(spam-protected)>
> >> >>> >> >>> >> >> >>>>>>> writes:
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Henning> On 03/26/2014 07:41 PM, Russell Senior
> wrote:
> >> >>> >> >>> >> >> >>>> Anybody get a chance to look at the strace? I see
> >> >>> >> >>> >> >> >>>> a:
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Henning> strace and packet dumps are much too
> lowlevel
> >> >>> >> >>> >> >> >> to
> >> >>> >> >>> >> >> >> directly
> >> >>> >> >>> >> >> >> Henning> hunt problems like this. Thats why Saverios
> >> >>> >> >>> >> >> >> question
> >> >>> >> >>> >> >> >> about
> >> >>> >> >>> >> >> >> Henning> txtinfo good, because it gives you a much
> >> >>> >> >>> >> >> >> more
> >> >>> >> >>> >> >> >> high-level
> >> >>> >> >>> >> >> >> Henning> view on what is going on.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> I had not installed the modules previously, so that
> >> >>> >> >>> >> >> >> interface
> >> >>> >> >>> >> >> >> wasn't
> >> >>> >> >>> >> >> >> immediately available. It is now.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> [...]
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Henning> Okay, lets get back to the high-level view.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Henning> To interpret the events you described we
> need
> >> >>> >> >>> >> >> >> a
> >> >>> >> >>> >> >> >> list
> >> >>> >> >>> >> >> >> of
> >> >>> >> >>> >> >> >> Henning> nodes, with their interface IPs and the
> >> >>> >> >>> >> >> >> connectivity
> >> >>> >> >>> >> >> >> between
> >> >>> >> >>> >> >> >> Henning> them.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Here is the list of neighbors of 2001:470:e962::407.
> >> >>> >> >>> >> >> >> The
> >> >>> >> >>> >> >> >> addresses
> >> >>> >> >>> >> >> >> listed are on the public wifi. The OpenVPN
> addresses
> >> >>> >> >>> >> >> >> of
> >> >>> >> >>> >> >> >> each
> >> >>> >> >>> >> >> >> node
> >> >>> >> >>> >> >> >> are
> >> >>> >> >>> >> >> >> a permutation, e.g. if the public wifi addr is
> >> >>> >> >>> >> >> >> 2001:470:e962:wxyz::1,
> >> >>> >> >>> >> >> >> then the OpenVPN address of the node is
> >> >>> >> >>> >> >> >> 2001:470:e962::wxyz.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> None of the nodes connect directly, everything goes
> >> >>> >> >>> >> >> >> through
> >> >>> >> >>> >> >> >> ::407.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> From curl -6 http://localhost:$port/neighbors
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> https://personaltelco.net/~russell/olsrd/olsrd-neighbors.txt
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Henning> I am also a bit worried about your usage of
> >> >>> >> >>> >> >> >> bridges
> >> >>> >> >>> >> >> >> Henning> connected to mesh interfaces. Normally you
> >> >>> >> >>> >> >> >> should
> >> >>> >> >>> >> >> >> no
> >> >>> >> >>> >> >> >> bridge
> >> >>> >> >>> >> >> >> Henning> any interface that OLSR uses for meshing.
> >> >>> >> >>> >> >> >> Mixing
> >> >>> >> >>> >> >> >> routing
> >> >>> >> >>> >> >> >> Henning> (L3) and bridging (L2) can go wrong in very
> >> >>> >> >>> >> >> >> creative
> >> >>> >> >>> >> >> >> ways.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> I don't understand how the bridges could be a
> problem
> >> >>> >> >>> >> >> >> in
> >> >>> >> >>> >> >> >> this
> >> >>> >> >>> >> >> >> case.
> >> >>> >> >>> >> >> >> This is a hub and spoke topology. One openvpn
> server
> >> >>> >> >>> >> >> >> in
> >> >>> >> >>> >> >> >> the
> >> >>> >> >>> >> >> >> middle,
> >> >>> >> >>> >> >> >> nodes at the edges. None of the nodes interconnect
> >> >>> >> >>> >> >> >> otherwise.
> >> >>> >> >>> >> >> >> Olsr
> >> >>> >> >>> >> >> >> is broadcast on the wifi in case there are any olsrd
> >> >>> >> >>> >> >> >> devices
> >> >>> >> >>> >> >> >> nearby,
> >> >>> >> >>> >> >> >> but, again, there is no overlap in the wifi coverage
> >> >>> >> >>> >> >> >> (and
> >> >>> >> >>> >> >> >> if
> >> >>> >> >>> >> >> >> there
> >> >>> >> >>> >> >> >> were physically, they are on different SSIDs and
> >> >>> >> >>> >> >> >> wouldn't
> >> >>> >> >>> >> >> >> overlap
> >> >>> >> >>> >> >> >> logically).
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Can you explain more about what in particularly
> would
> >> >>> >> >>> >> >> >> make
> >> >>> >> >>> >> >> >> you
> >> >>> >> >>> >> >> >> worry?
> >> >>> >> >>> >> >> >> This configuration has been stable for us on ipv4
> for
> >> >>> >> >>> >> >> >> years
> >> >>> >> >>> >> >> >> and
> >> >>> >> >>> >> >> >> also
> >> >>> >> >>> >> >> >> on ipv6 until very recently, since late 2012 at
> least.
> >> >>> >> >>> >> >> >> So, I
> >> >>> >> >>> >> >> >> suspect
> >> >>> >> >>> >> >> >> a bug. Somewhere.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Henning> Txtinfo output would be good (especially
> >> >>> >> >>> >> >> >> /route)
> >> >>> >> >>> >> >> >> would
> >> >>> >> >>> >> >> >> be
> >> >>> >> >>> >> >> >> Henning> good to see... before the problem, during
> >> >>> >> >>> >> >> >> the
> >> >>> >> >>> >> >> >> problem
> >> >>> >> >>> >> >> >> and
> >> >>> >> >>> >> >> >> Henning> after the recovery.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> I'm using curl -6 http://localhost:$port/routes to
> get
> >> >>> >> >>> >> >> >> the
> >> >>> >> >>> >> >> >> following
> >> >>> >> >>> >> >> >> data, before, during and after turning on an ipv6
> >> >>> >> >>> >> >> >> olsrd
> >> >>> >> >>> >> >> >> on a
> >> >>> >> >>> >> >> >> particular node (2001:470:e962:11c1::1).
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> https://personaltelco.net/~russell/olsrd/olsrd-routes-before.txt
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> https://personaltelco.net/~russell/olsrd/olsrd-routes-during.txt
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> https://personaltelco.net/~russell/olsrd/olsrd-routes-after.txt
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Henning> It would also help if you can reduce the
> >> >>> >> >>> >> >> >> number
> >> >>> >> >>> >> >> >> of
> >> >>> >> >>> >> >> >> nodes
> >> >>> >> >>> >> >> >> Henning> while still replicating the problem to a
> >> >>> >> >>> >> >> >> minimum.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> I don't have that level of control, unfortunately.
> >> >>> >> >>> >> >> >> When
> >> >>> >> >>> >> >> >> I
> >> >>> >> >>> >> >> >> notice
> >> >>> >> >>> >> >> >> that
> >> >>> >> >>> >> >> >> the ipv6 routes have collapsed, I pick a likely
> >> >>> >> >>> >> >> >> seeming
> >> >>> >> >>> >> >> >> node
> >> >>> >> >>> >> >> >> (maybe
> >> >>> >> >>> >> >> >> because it had been plugged in recently) and turn
> off
> >> >>> >> >>> >> >> >> ipv6
> >> >>> >> >>> >> >> >> olsrd,
> >> >>> >> >>> >> >> >> and
> >> >>> >> >>> >> >> >> over 30-60 seconds, magically the routes all come
> >> >>> >> >>> >> >> >> back.
> >> >>> >> >>> >> >> >> My
> >> >>> >> >>> >> >> >> luck
> >> >>> >> >>> >> >> >> in
> >> >>> >> >>> >> >> >> guessing the right node to turn off is a little bit
> >> >>> >> >>> >> >> >> "too
> >> >>> >> >>> >> >> >> good",
> >> >>> >> >>> >> >> >> if
> >> >>> >> >>> >> >> >> you
> >> >>> >> >>> >> >> >> know what I mean, so that I am not sure there is
> >> >>> >> >>> >> >> >> anything
> >> >>> >> >>> >> >> >> particularly
> >> >>> >> >>> >> >> >> unique about the node I choose. But, nevertheless,
> >> >>> >> >>> >> >> >> turning
> >> >>> >> >>> >> >> >> it
> >> >>> >> >>> >> >> >> off
> >> >>> >> >>> >> >> >> seems to help, generally.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> FWIW, I'm including olsrd versions here. The
> central
> >> >>> >> >>> >> >> >> machine
> >> >>> >> >>> >> >> >> ::407
> >> >>> >> >>> >> >> >> is
> >> >>> >> >>> >> >> >> running 0.6.6.1, compiled from the tarball. The
> nodes
> >> >>> >> >>> >> >> >> have
> >> >>> >> >>> >> >> >> the
> >> >>> >> >>> >> >> >> following versions, all built from openwrt routing
> >> >>> >> >>> >> >> >> feed
> >> >>> >> >>> >> >> >> sources.
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> https://personaltelco.net/~russell/olsrd/olsrd-versions-by-node.txt
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> Here is a table listing the frequency of each
> openwrt
> >> >>> >> >>> >> >> >> version:
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> 1 0.6.3-3
> >> >>> >> >>> >> >> >> 33 0.6.4-1
> >> >>> >> >>> >> >> >> 1 0.6.5.1-1
> >> >>> >> >>> >> >> >> 1 0.6.5.1-2
> >> >>> >> >>> >> >> >> 7 0.6.5.2-1
> >> >>> >> >>> >> >> >> 1 0.6.5.3-1
> >> >>> >> >>> >> >> >> 2 0.6.5.4-1
> >> >>> >> >>> >> >> >> 2 0.6.6-2
> >> >>> >> >>> >> >> >> 7 0.6.6-3
> >> >>> >> >>> >> >> >> 11 0.6.6.1-1
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> --
> >> >>> >> >>> >> >> >> Russell Senior, President
> >> >>> >> >>> >> >> >> (spam-protected)
> >> >>> >> >>> >> >> >>
> >> >>> >> >>> >> >> >> --
> >> >>> >> >>> >> >> >> Olsr-users mailing list
> >> >>> >> >>> >> >> >> (spam-protected)
> >> >>> >> >>> >> >> >> https://lists.olsr.org/mailman/listinfo/olsr-users
> >> >>> >> >>> >> >> >
> >> >>> >> >>> >> >> > --
> >> >>> >> >>> >> >> > Olsr-dev mailing list
> >> >>> >> >>> >> >> > (spam-protected)
> >> >>> >> >>> >> >> > https://lists.olsr.org/mailman/listinfo/olsr-dev
> >> >>> >> >>> >> >
> >> >>> >> >>> >> >
> >> >>> >> >>> >
> >> >>> >> >>> >
> >> >>> >> >>
> >> >>> >> >>
> >> >>> >> >
> >> >>> >
> >> >>> >
> >> >>
> >> >>
> >> >
> >
> >
>
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