Router Dynamic DNS - DHCP Inside and Outside - Newbie help

Dec 01, 2005 4 Replies
I

Hello,



I am still a newbie to Cisco and I am trying to learn about Cisco Routers/IOS. I have a router that I am trying to setup with DHCP on the WAN and LAN side. The problem I am running into is - I can't figure out how to get the DNS info from the WAN (E1) to the LAN (E0). DHCP gives my laptop an IP address (192.168.1.10), subnet (255.255.255.0), and gateway (192.168.1.1), but I don't get the DNS addresses on the WAN or LAN. When I plug straight into the network with my laptop I get everything I need and can surf. So, I guess the question is - How do I get the WAN which is DHCP to get an address, subnet, gateway, and dns info and pass that info thru to the LAN? I hope this makes sence as I am trying to learn all of the terminology.



Thank you in advance,



Daniel



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M

Not easily done with Cisco IOS. Linsys boxes do it automatically.

What router and IOS version are you using.

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I

Hi - Thanks for the response.

I have a Cisco 831 running c831-k9o3y6-mz.124-5.bin

Do you have any suggestions - My ISP wants me to use DHCP (sticky IP). Can I set the router WAN interface as DHCP and assign static DNS addresses?

Thanks again... I'm glad it isn't easy - I've spent almost 2 full days working on this problem...

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M

What is the access technology that your ISP is providing ?

Please post your current config

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M

Assuming that the E1 does get DNS addresses, you can check by closely inspecting the clues in "debug dhcp detail", and I think the "show host" command will also display the nameserver addresses you have got, then in the DHCP pool on the router you put the "import all" command, i.e.

! ip dhcp pool FOO network 192.168.1.0 /24 default-router 192.168.1.1 import all !

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