IP Routing

[kmcallister]

Hello everyone I need some guideance on some IP routing issues. I'm changing my frame relay carrier so the IP scheme of my remote locations are changing. The problem is I do not want to change the ips in my corporate office. Her are the IP schemes:
Corp 10.1.2.x
SN: 255.255.0.0
GW: 10.1.2.1
Remote1 192.168.207.x
SN: 255.255.255.0
GW: 192.168.207.1
Remote2 192.168.208.x
SN: 255.255.255.0
GW: 192.168.208.1

I host my own internal DNS and I'm also running DHCP on a Win2K server.

Each location have their own internet connection. How can I go about configuring IP routing so that the remote locations are able to access my corporate LAN to it resources (ie. Exchange, network fax, virus protection etc...).

 

[dearingkr]

First off, just because you're changing carriers doesn't mean you have to change your internal IP scheme.

Can't give you much more info without knowing how you're network is laid out.

Are your remote sites connected to corp with a private circuit or over the internet?

Do you own and control the routers or are they 'managed'?


MCSE CCNA CCDA

 

[dk87]

1. All of the addresses you have (10.1.2.x and 192.168.x.x) are non-public ranges. The carrier will not care.
2. If you are changing frame relay carriers, your problem is not your current IP addressing scheme. Your problem is how to maintain connectivity during the change. Will you be adding serial connections to your existing routers (new DSU and all) or will you be converting existing ones? Your routers will need to be set up to see the PVC's of the new lines. There will be timing issues in converting over, are you prepared for a network outage? Or are you going to bring in new hardware (routers, etc) and start fresh? What routing protocols will you be running? Sorry, we can't help you much until we know such things as router hardware, upgrade plan (general, of course. Never give away confidental info), routing protocols, etc. Your DSU/CSU's man also have to be configured. Are you running ESF/B8ZS, etc? LMI issues?

 

[dk87]

Correction to 1. above: Frame relay is layer 2. The carrier will not care about your IP addresses at all.

 

[kmcallister]

My cariier is providing me with a managed/private connection. The IPs assigned by them are private IPs.
Corp:
New 192.168.207.x 255.255.255.0
Old 10.1.2.x 255.255.0.0
RemoteA
Old: 10.2.1.x 255.255.255.0
New :192.168.208.x 255.255.255.0
RemoteB
Old: 10.3.1.x 255.255.255.0
New: 192.168.209.x 255.255.255.0
RemoteC
Old: 10.4.1.x 255.255.255.0
New: 192.168.210.x 255.255.255.0
RemoteD
Old: 10.5.1.x 255.255.255.0
New: 192.168.211.x 255.255.255.0
RemoteE
Old: 10.6.1.x 255.255.255.0
New: 192.168.213.x 255.255.255.0

I have no problem changing the remote location IP. I just dont want to change out the IPs at my corporate office. In order for them to manage my network, I have to utilize the IPs assigned.
I can ping ips within the remote network. So all I need to do is route IPs coming in from 192.168.x.x to my local LAN of 10.1.2.x.

 

[dearingkr]

My advice to you is to get a hold of your carrier.
You tell them what your IP scheme is.
You're the customer. It's up to them to make it work with your existing internal network.

MCSE CCNA CCDA

 

[kmcallister]

This is a managed network that is being installed. The provider is assigning the private IP schemes that corrisponds to their network. It is required for me to change my IP in all of my locations, but I do not want to do that. All I want to do is route traffic between the 2 network.