[olug] [Slightly OT] Public IPs through Cisco Routers

[Dan Clough]

I've got four /24 blocks subnetted from 10.0.0.0 and each subnet is assigned
to each router, with one subnet used for the WAN ports.

The 1600 is assigned 10.0.70.0 but doesn't yet have a LAN-side Ethernet port
The 2600 has 10.0.50.0
The 3600 has 10.0.60.0

I think I've got it working to a point.  I placed the routers' WAN ports on
10.0.10.0/24 (1, 2 and 3) and plugged all of their WAN ports into an
unmanaged switch.  They advertise to each other through RIP and I can see
the routes in "show ip route".  I'm currently working on getting EIGRP up
and running.

I must have been looking for the wrong solution to the wrong problem... I
didn't realize that the WAN port has an IP that's outside of the LAN's
netblock... maybe I should set down the IOS manual and pick up "Networking
for Dummies".

Dan

-----Original Message-----
From: olug-bounces at olug.org [mailto:olug-bounces at olug.org] On Behalf Of
Kenny Kant
Sent: Monday, June 09, 2008 9:33 PM
To: Omaha Linux User Group
Subject: Re: [olug] [Slightly OT] Public IPs through Cisco Routers

Dan,

Can you provide some more information and possible your current router 
configurations.  Do you have a single /24 block from your provider or 
are the private networks in your example supposed symbolize the two 
networks.  If you could provide some more information to help with us 
visualizing the setup that would help me :)  Thanks!

Kenny



Dan Clough wrote:
> Well, it's not technically Linux related, but here goes.
>
>  
>
> I'm trying to set up a Cisco router (a 2600 and 3600) to route between two
> netblocks - 192.168.100.1 and 192.168.101.1.  The connection is over
> Ethernet, so there's no insanely complex CSU or clock rate involved.
>
>  
>
> My problem is that every single source I can find on the web explains how
to
> set up Cisco routers with NAT.  I've already learned how to set up NAT on
> the routers but what I need to do right now involves routing with public
IPs
> (I'm using private IPs just so I don't screw anything up if something gets
> plugged into a production network).  To turn this into a scenario of
sorts,
> I have a /24 netblock and need to give a few servers public IP addresses.
>
>  
>
> Can anyone point me to a good online resource to get started?
>
>  
>
> Thanks,
> Dan
>
> _______________________________________________
> OLUG mailing list
> OLUG at olug.org
> http://lists.olug.org/mailman/listinfo/olug
>
>   

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