Problem with more than two Subnets!

[Andres Sommerhoff]

Thanks Guus for your answer. I have tried this too, but I can't set the vnp
interface to ethernet.
I'm doing something wrong. I have tried with:

  1)  ifconfig $INTERFACE 10.0.250.1 hw ether fe:fd:0:0:0:0
  2)  ifconfig $INTERFACE 10.0.250.1 netmask 255.255.0.0 -pointopoint
  3)  ... and a lot of others combinations (with and without arp)

But nothing. The vnp is always set to point-to-point. Should I set the vnp
device (or maybe the tun device) in another way?
Should I make the tun device again?

         Thanks again,

               Andres Sommerhoff


----- Original Message -----
> From: "Guus Sliepen" <guus at sliepen.eu.org>
> To: <tinc at nl.linux.org>
> Cc: "Andres Sommerhoff" <asommerh at chilesat.net>
> Sent: Saturday, July 19, 2003 4:56 AM
> Subject: Re: Problem with more than two Subnets!
>
> On Fri, Jul 18, 2003 at 10:59:23PM -0400, Andres Sommerhoff wrote:
>
> > Hello, I successfully built a vpn between two hosts ("main" and
> > "iquique") (and its SubNets), but I have problems when I want to add
> > another host ("valparaiso"): I get a lot of Duplicates packets
> > everywhere and a very slow vpn. I guess that is a routing problem, but
> > I have try with a lot of alternatives without result. I have try with
> > "switch", "hub" and "router" modes, too. If I turn off one of the
> > clients ("iquique" or "valparaiso") the vpn return to the normality. I
> > have RH 9.0 and tinc-1.0CVS (The only version that run on RH 9.0) of
> > one week ago. Someone has an idea or solution for this?
>
> You must make sure that all tinc daemons are configured to use the same
> mode. The information you sent is a bit contradictory, for instance:
>
> > [root at main /etc/tinc/vpn]# cat tinc.conf
> >   Name = main
> >   Mode = switch
> >   Device=/dev/net/tun
>    PrivateKeyFile = /etc/tinc/vpn/rsa_key.priv
> [...]
> > [root at main /etc/tinc/vpn]# ifconfig
> [...]
> >   vpn     Link encap:Point-to-Point Protocol
> >           inet addr:10.0.250.1  P-t-P:10.0.250.1  Mask:255.255.0.0
> >           UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
> >           RX packets:35 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:36 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:10
> >           RX bytes:4531 (4.4 Kb)  TX bytes:4246 (4.1 Kb)
>
> If tinc were in switch mode, the vpn interface would never be
> Point-to-Point, but Ethernet.
>
> Looking at the setup of your network I'd say you should stick to router
> mode. However, all of this doesn't explain why you see duplicate
> packets. The packets are not duplicated by tinc, because the TTL is
> different, and tinc doesn't alter packets in any way. Could you try to
> use tcpdump on various interfaces to look where the duplicates are
> created?
>
> --
> Met vriendelijke groet / with kind regards,
>    Guus Sliepen <guus at sliepen.eu.org>

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