From: Ina&Laurean (ina.laurean@gmail.com)
Date: Fri Jul 27 2007 - 18:44:42 ART
Hi Matt,
I believe that will work, I've done some testing with a configuration
similar with yours with 3 outside interfaces and one inside pool.
Acutally I went even further because what I had load balancing across
interfaces.
The routing is done before NAT on the outside path and it should work on
your scenario as well.
Laurean
On 7/27/07, Matthew Seppeler <matthew.seppeler@inxi.com> wrote:
>
> Not sure if this can be done but figured I would post to see if anyone
> may have the answer.
>
> I'm doing a SRT to see if you can nat outside of multiple interfaces on
> the same router without having to make manual configuration changes.
>
> You have 3 default routes in the routing table, each one associated with
> a Vlan (Vlan 10,20 & 30). At any given time only one of these default
> routes will be in the routing table and will be determined whether the
> port is in an Up/Up status and/or by the administrative distance of the
> static in the routing table.
> Vlan10 - Ethernet handoff
> ip route 0.0.0.0 0.0.0.0 Vlan10 251
> Vlan20 - Wireless handoff
> ip route 0.0.0.0 0.0.0.0 Vlan20 252
> Vlan30 - UMTS/GPRS modem
> ip route 0.0.0.0 0.0.0.0 Vlan30 253
>
> The inside source list will remain the same (ie. 192.168.1.0/24 on
> Vlan50). However, depending on the situation, the router may only be
> connected to the Internet via an Ethernet handoff (ie, DSL, Satellite,
> Cable Modem, etc.) Wireless handoff and/or a cellular data card. If all
> three are Up/Up, then it takes the Vlan10 as it has the lowest AD.
> However, if you do not physically plug something into Vlan10's Ethernet
> port then it will be in a Up/Down state and remove its static from the
> routing table. Being the case, then Vlan20 is next in line provide its
> Vlan interface is Up/Up. If not, then Vlan30 will be the last choice up
> Internet connectivity for the router. So in short, the router is kind
> of like a "box of chocolates, you never know what you are going to get."
> Being the case, I was wondering if there was a way to configure NAT so
> that you can use the same inside source list of addresses but have
> multiple outside interfaces (Van,20&30) and have NAT automatically work
> without having to make any manual NAT configuration changes.
>
>
>
> Matt Seppeler
>
>
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