Multiple networks - Same router

[ManagerJay]

I am preparing to make the switch from a public IP address scheme to a private IP address scheme. The box for handling NAT is in place and working, now I am in the process of programming the routers.

The router at the center of of WAN (star configuration) is a CISCO 2501 with IOS 11.0. At this point in time, I have two IP addresses assigned to the router 12.13.X.X and 10.129.10.1.

The routers in our remote offices all have IP addresses of 199.223.X.X.

Is it possible to forward requests within the router? For example, if a workstation of the 12.13.X.X network pings 10.129.10.1 I would like for it to receive a repsonse. This way I can slowly move workstations, etc. over to the new addressing scheme.

Thanks in advance for your assistance.



Jay

 

[ChrisAC]

If you mean, can a router route between networks .. yes!! That's what routers do!! Providing that there's nothing else in place stopping it, if a host on network 12.13.x.x pings 10.129.10.1 then it should receive a response!

Chris.
************************
Chris Andrew, CCNA
chrisac@gmx.co.uk
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[lui3]

Jay,

We need a little more detail here on what exactly you are trying to do and what you think might happen.

LUI3

 

[ManagerJay]

I had assumed that a) the secondary IP would appear at the remote routers through EIGRP and b) I would not have to add any additional static routes.

It was my understanding from reading CISCO's web site that the secondary IP would be propogated through EIGRP, but that was not the case.

Once I added static routes for the secondary IP addresses everything started working just like I thought it should.

Basically, I am preparing to cut over my IP addresses to a different numbering scheme. And, since I must interface with our parent organization, I must maintain the the old set of IP addresses until they can update their routings and printer definitions.

Thanks for your help.



Jay

 

[wybnormal]

Secondary IPs and routing is spotty at best. Alot depends on the version of IOS and which router you are working with. Not all routing protocols will work with secondary IPs..

A few other ideas would be to use NAT to block off the sections of the network that can not yet and then go ahead and change the parts that you can.. you can always static map the NAT address for critical services like email, share points etc.

The router itself doesnt really care about subnets.. it's whole goal for happiness is to route subnets.

MikeS
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