IP Routing

From: Lars Bro <Lars.Bro_at_gnnettest.com>
Date: Fri, 05 Jan 2001 10:26:35 +0100

Hi, Managers.

I have a 4.0F machine that behaves in a way that I cannot explain.


host --- router ----- otherhosts

The host is connected to the rest of the network via a Cisco router. From
time to time,
some routes are modified to something illegal. In netstat -r, they get the M
flag which
means "modified by redirect". (I can change the route back by "route change"
and
the other host is reachable again)

Now, this happens when the host runs routed, which I can understand, since
the purpose
of routed is to maintain route table entries.

However, this also seems to happen when the host runs neither routed nor
gated but
has the router as static "default gateway" and this I dont understand. It
should not
be possible, or ?

If I want to be really sure that routes are never changed, would it help to
define every
host route in /etc/routes or would they still get modified ?


Yours,
Lars Bro
Received on Fri Jan 05 2001 - 11:07:48 NZDT

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