Networking help

pll at lanminds.com pll at lanminds.com
Thu Dec 12 15:46:32 EST 2002


In a message dated: 12 Dec 2002 15:01:05 EST
Ed Robbins said:

>Paul,
>
>Can you draw a rough diagram of the layout.  In your original post you
>refer to them as SystemA, SystemB and SystemC.  I find it helpful, to
>know the layout with the addresses.  

>Where does 10.241.38.2 come into play?  Is that another multi-homed box
>with an interface on the 168.159.36 network?






				  -------  
				 |       |    C'
 			---------|   C   |---------
  ------- 	 ___   /	 |       |         \
 |       |	{   } /		  -------           \   ----------
 |   A   |------{ R }<                               > |    S     |
 |       |	{___} \		  -------           /   ----------
  ------- 	       \	 |       |    B'   /
			---------|   B   |---------
				 |       |
				  ------- 


	A = 168.159.36.90
	B = 10.241.38.11
	B'= 192.168.10.11
	C = 10.241.38.16
	C'= 192.168.10.16
	S = private LAN switch.
	R = Router (1 or more between A and B/C. The router immediately
		    before the B/C subnet is either 10.241.38.1 or .2
		    (redundant routers I think)

>The first think I noticed was the two default routes, on multi-homed
>boxes I only run one default route and then add specific network routes
>to handle packets that won't go through the default route.  Have you
>tried adding a specific route to handle the request, I can't think of a
>single case, that I've experienced,  in the scenario that you describe
>that hasn't come down to a problem in configuring the routing tables.

I haven't tried this, simply becaue, AFAIK, under Linux, 1 default
route per network is the norm (i.e. I've seen this on a variety of
systems as the "default configuration, and it's always worked).

Now, one thing I just noticed is that my default route is set to .1,
yet when I traceroute, I'm going to .2.  I wonder if I should be
changing my default route to point to .2?  It's currently .1 because I
was told that was my default gateway.  .2 might be a redundant interface
into that router, or it might be a switch which hands things off to 
the .1 gw, I don't know.  I'm not in control of the networking layer here :(

-- 

Seeya,
Paul
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