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TOPIC: CISCO ROUTER Problem! help!!!

CISCO ROUTER Problem! help!!! 11 years 8 months ago #7359

  • eli2983
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Hi, I have a small LAN at my home! and also a cisco router (soho 91). i have a nat and a dhcp running on the router! but when i connect the router directly to my modem - all the pc's cant reach the internet! when i connect only 1 pc to the modem it reaches the internet. this is my main configuration:

interface Ethernet0
ip address
ip nat inside
load-interval 30
no cdp enable
hold-queue 100 in
hold-queue 100 out
interface Ethernet1
description ***link to cables via CM***
ip dhcp client class-id eth1
ip address dhcp
ip nat outside
duplex auto
no cdp enable

ip dhcp pool CLIENT
import all
lease 0 2

ip route ethernet 1

i have not configured dialer here,beacause it is automatic! when i connect 1 pc to the modem i have internet (without create dialer).

i will be very glad if someone can help me by solving this problem! if someone can redirect me to a web site which explains it i will be also glad thanks!!!
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Re: CISCO ROUTER Problem! help!!! 11 years 8 months ago #7402

  • tiamat
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it doesn't appear that your natting is fully configured. you'll need to create an ACL for the hosts that you want to nat (your network) and add the nat overload statement to the config.

something like this:

access-list 10 permit
ip nat inside source list 10 interface Ethernet1 overload

EDIT: Also, you'll want to eventually modify your DHCP scope to exclude the address that you've used for the router's own interface E0, otherwise you'll get a conflict (if you end up with more than 253 hosts on your network, which probably won't happen, but still). It's always a good idea to exclude something like the beginning and ending 10 addresses or so for static purposes like routers, printers, servers, etc.

EDIT (again): here is a link to the basic router config for a soho 91 on cisco's site:
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Re: CISCO ROUTER Problem! help!!! 11 years 7 months ago #7441

  • Chris
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tiamat's post is correct - your NAT is not fully configured. Follow the guidelines given on the above post and let us know what the results were.

Chris Partsenidis.
Founder & Editor-in-Chief
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