Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

basic routing problem--ISP uses DHCP

I have a simple problem that I am drawing a blank on. I have a 1812 router and Fa1 is connected to a cable modem for the external connection. The ISP uses DHCP, and I get an IP address successfully, and I can ping an external address successfully--until I specify that it is coming from the internal address (192.168.30.1/Vlan1).

I know it is something simple, but I am drawing a blank. I added the current config below.

1 REPLY
New Member

Re: basic routing problem--ISP uses DHCP

It doesn't look like you are using Network Address Translation. The IP's that you're using on your internal network are not publicly routable (they're RFC 1918 addresses). Check out the following link for an example:

http://www.cisco.com/warp/public/556/12.html

120
Views
0
Helpful
1
Replies