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Need help configuring 1841 Router with a WIC-ADSL1 Module

dallen0
Level 1
Level 1

‎08-17-2011 08:12 AM - edited ‎03-04-2019 01:18 PM

Hello folks...

I am new to using this forum so please bare with me...

I only know a little about programming a CISCO router but I know the config I setup is not working...

Here is what I want to do...

  • The ISP provides us with IP Addresses via DHCP. Our public address is NOT static so the interface on the DSL Module needs to be provisioned to get a DHCP address with a CLASS C License.
  • The IP address of the Router should be 10.0.0.10 subnet=255.255.255.0
  • The LAN Clients need receive their IP address via DHCP EXCEPT for a range of 100 addresses. The lan Clients only need about 40 DHCP addresses.
  • ONE of the Lan Clients (10.0.0.3) needs to have ports 25, 1723, and others forwarded to it.

Below is the config I am trying to use but I can't even ping the router from the LAN. What am I doing wrong?

Can anyone tell me how to fix this and can you send examples or even rewrite my config for me? I would be grateful!

Please advise...

Dale Allen

Labels:
112033-My cisco 1841 configuration.txt.zip
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41 Replies 41

Peter Paluch
Cisco Employee
Cisco Employee

‎08-17-2011 08:32 AM

Dale,

Paste these commands directly to your router after being in the global configuration mode (you call it up using the configure terminal command):

ip routing
ip cef
interface FastEthernet0/0
 ip route-cache
 ip route-cache cef
 duplex auto
end

I also have a question: Your ADSL PPP configuration is currently performed in the PPPoA style. There is also a more common approach used, the PPPoE. You have to verify with your ISP what kind of PPP is used, as these two encapsulations are not compatible nor interchangeable. Also, is the PVC 0/35 correct? Again, this must be verified against your ISP as there is no default setting.

After these changes, you should at least be able to receive an IP address automatically on your PC if connected to the Fa0/0 interface, and be able to ping the 10.0.0.10. If not, there are probably some physical problems with the connection - in that case, try using the show ip interface brief command and check whether the FastEthernet0/0 interface is reported as up/up. If not, there is a cabling problem.

Best regards,

Peter

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