From: Ard van Breemen <ard@telegraafnet.nl>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] proxy arp and routing
Date: Mon, 04 Feb 2002 14:59:44 +0000 [thread overview]
Message-ID: <marc-lartc-101283481408258@msgid-missing> (raw)
In-Reply-To: <marc-lartc-101260332616001@msgid-missing>
On Fri, Feb 01, 2002 at 02:41:49PM -0800, David Koski wrote:
> Given the network map below, I am able to ping any ip on all networks from the
> linux box. However, from the cisco router, I cannot ping past eth1 on the linux
> box. The reverse is also true; I cannot ping past eth0 from a host on LAN.
> proxy-arp is enabled on the linux box and the route to a.b.c.0/24 is added to
> the cisco router. I haven't a clue why either way, I can only get to the far
> side of the linux box but no further.
I do not care about your ascii art, just about the following:
ip route show
/proc/sys/net/ipv4/conf/eth[012]/proxy_arp
/proc/sys/net/ipv4/conf/eth[012]/rp_filter
/proc/sys/net/ipv4/ip_forward
1) proxy_arp must be set to 1
2) rp_filter: you might start with 0
3) ip_forward should be set to 1
4) all routes must be sane:
ip route add a.b.c.0/28 dev eth0
ip route add a.b.c.0/24 dev eth1
ip route add 192.168.1.0 dev eth2
ip route add default via a.b.c.1
Then you should be able to arp-ping the whole world from anywhere inside
your network.
--
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next prev parent reply other threads:[~2002-02-04 14:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-01 22:41 [LARTC] proxy arp and routing David Koski
2002-02-02 5:13 ` David Koski
2002-02-02 17:44 ` David Koski
2002-02-02 19:19 ` David Koski
2002-02-04 14:59 ` Ard van Breemen [this message]
2002-02-04 17:58 ` David Koski
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