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New Member

Cisco Router 2600 question

Hello, I need a little advice: Currently I have a Cisco Router 2600, up and running with a T! interface Card to the outside world and a WAN card to the Local WAN. Currently it has XXX.XXX.65.0 through XXX.XXX.65.16 static address in use. We just asked and received another 16 static address from our internet provider, however the new ip addresses is XXX.XXX.73.0 through XXX.XXX.73.16. My question is, do I have to put in a second WAN card? Or can I (through the command line setup) add the new ip addresses, Or Both. I am not a cisco expert. Any Recommendation?

NOTE: I do have a second Cisco Router 2600 available for use, however I have only one T1 cable from the internet provider. (maybe a hub?)


Daniel Wilson

  • WAN Routing and Switching

Re: Cisco Router 2600 question

Use the following command on the interface

ip address x.x.73.16 secondary

The key word secondary allows for more than one address on an interface. You will also need to add routes or adjust your routing protocol to recognize the new network. If you need additional help please post your config.

Hope this helps.


New Member

Re: Cisco Router 2600 question

Solution 1:

As your SP have given as I guess from the above description.

The usable IP will be to,

Give the command

ip address secondary

to your Local WAN interface.

Change the Local Network Ip address scheme as per your requirement.

Default getway will be for the other machines and subenet will be and usable ip address fro the machine behine router will be to

T & R,