[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Linux and Routing
um.. need to get rid of the default gateway on eth1.. it will likely cause
problems..
Oh, and yeah, I think I forgot to turn on routing before too :-)
(that was one of those -- oops.. moments)
----------
> From: KoReE <koree@ameth.org>
> To: silug-discuss@silug.org
> Subject: Re: Linux and Routing
> Date: Wednesday, April 05, 2000 9:31 PM
>
>
> I fixed it. *basically* I didn't have ipv4 forwarding turned on. I did
> this, and everything worked great. Here's my routing table now:
>
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use
Iface
> 208.169.40.1 * 255.255.255.255 UH 0 0 0
eth1
> 206.152.121.102 * 255.255.255.255 UH 0 0 0
eth0
> 208.169.40.0 * 255.255.255.240 U 0 0 0
eth1
> 206.152.121.0 * 255.255.255.0 U 0 0 0
eth0
> 127.0.0.0 * 255.0.0.0 U 0 0 0
lo
> default mtv-cs3640-1.mv 0.0.0.0 UG 0 0 0
eth0
> default 208.169.40.1 0.0.0.0 UG 0 0 0
eth1
>
>
> If you'd like to see this in action, do a traceroute to 208.169.40.2.
> Although, it may not go, because the 208.169.40.2 machine is an iMac that
> shuts its network off when it is idle for so many minutes, and it doesn't
> seem to do wake on LAN.
>
> Koree
>
> ______________________________________________
> Koree A. Smith | Co-Administrator, ameth.org
> koree@Ameth.org | http://www.koree.net/
> koree@koree.net | Linux Rules!
> NT < *IX | I Corinthians 2:1-5
>
> Nous pensons que Linux représente à terme une menace pour Windows.
>
>
> On Wed, 5 Apr 2000, Matthew Walker wrote:
>
> >
> >
> >
> > ----------
> > > From: KoReE <koree@ameth.org>
> > > To: SILUG <silug-discuss@silug.org>
> > > Subject: Linux and Routing
> > > Date: Wednesday, April 05, 2000 7:12 PM
> > >
> > >
> > > Alrighty, this is what I'd like to do, and I'm about halfway there,
but
> > > I've run into a snag. I'm wanting to load a Linux box up with
Ethernet
> > > cards, to separate out a new Ethernet segment, but not have to go
through
> > > my Cisco router to do so. So, here's what I've done. I have two
> > Ethernet
> > > cards in a Linux machine. One card has been given an IP# on our main
> > > network - 206.152.121.0/42. The second, has not yet been given an
IP#,
> >
> > 42 bit subnet mask?
> >
> > > but, what I would like, is to give it an IP#, and then route a
network of
> > > IPs to that address, and then have the Linux box route those
addresses
> > > onto the new Ethernet segment. Am I making any sense at all? So,
the
> > > outcome would be, I'd hook an Ethernet hub up to the card, and be
able to
> > > plug devices into the hub and give them addresses on the routed
network.
> > > Does anyone know what direction I need to look to do this? I've
tried
> > > routing a /28 network to the machine, then giving the second card an
> > > address on that network, and then routed that network to that card.
But,
> > > I can only access the machine itself through the card, and the other
> > > machines I put on the hub and give secondary addys to, can't get out,
nor
> > > can I get into them. I know this is probably horribly
confusing...the
> > way
> > > I've put this...but, I'm working totally theoretically here, anyway.
So,
> > > any pointers would be greatly appreciated.
> > >
> >
> > It sounds like one set or another of the machines don't know how to get
> > back to the other machines... for instance, say the a.a.b.x network is
> > connected by a router a.a.b.1 to the internet and your machine is
a.a.b.254
> > on that network. The second network is a.a.c.x and your machine is
a.a.c.1
> > on that network. The machines on a.a.c.x network would have a.a.c.1 as
> > their default gateway. The machines on the a.a.b.x network, however,
will
> > need to have a route to the a.a.c.x network via a.a.b.254 in addition
to
> > their default gateway a.a.b.1
> >
> > Also, I have used tcpdump in an instance like this to help me
understand
> > where the traffic is going or not going... you would probably see the
> > inside machines successfully send a ping packet to the middle network,
but
> > the machines in the middle network probably are sending their info out
to
> > the default router.
> >
> > Another way to do this is put a static route on your cisco router...
the
> > middle network machines will get an ICMP redirect from the router and
will
> > "learn" the route to the innermost network as well as propogate out the
> > information to other routers via whatever routing protocol (if
necessary)
> > > Thanks,
> > >
> > > Koree
> > >
> > > ______________________________________________
> > > Koree A. Smith | Co-Administrator, ameth.org
> > > koree@Ameth.org | http://www.koree.net/
> > > koree@koree.net | Linux Rules!
> > > NT < *IX | I Corinthians 2:1-5
> > >
> > > Nous pensons que Linux représente à terme une menace pour Windows.
> > >
> > >
> > >
> > > --
> > > To unsubscribe, send email to majordomo@silug.org with
> > > "unsubscribe silug-discuss" in the body.
> >
> > --
> > To unsubscribe, send email to majordomo@silug.org with
> > "unsubscribe silug-discuss" in the body.
> >
>
>
> --
> To unsubscribe, send email to majordomo@silug.org with
> "unsubscribe silug-discuss" in the body.
--
To unsubscribe, send email to majordomo@silug.org with
"unsubscribe silug-discuss" in the body.