how do I config a 1721 router for a cable modem ?

[chris8754]

I' using a 1721 router and a 2950 switch. I want my cable modem connected to my router's WAN port. How do I config the router to dynamically get an IP address from my ISP? Or do I get a static IP from them.

Thanks,

Chris

[Georg Pauwen]

Hello Chris,

on the interface where the cable modem is connected to, configure the command:

ip address dhcp

or

ip address negotiated

Check this document for a sample config:

How to Configure a Cisco Router Behind a Non-Cisco Cable Modem

http://www.cisco.com/en/US/partner/tech/tk86/tk89/technologies_configuration_example09186a0080094be1.shtml

HTH,

Georg