From: CCIE4Me (ccie4me@inbox.lv)
Date: Thu Dec 07 2006 - 09:34:17 ART
Cacca,
I am using the same setup at home with a 2611 connected to a cablevision
modem. First note the default gateway and DNS settings from the Cable modem,
then connect the cable modem to one of your fasthethernet interface on the
Cisco 1841 eg fa0/0 and do the following to enable any one connected to a
hub/switch that is connected to fa0/1 of the router to have access to the
internet.
!
interface Fastethernet0/0
ip address dhcp
ip nat outside
!
interface Fastethernet0/1
ip address 192.168.1.1 255.255.255.0
ip nat inside
!
ip dhcp excluded-address 192.168.1.1 192.168.1.10
!
ip dhcp pool INTERNAL
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server <dns server 1> <dns server 2>
!
ip route 0.0.0.0 0.0.0.0 <default gateway from cable modem>
!
ip nat inside source list 1 interface fa0/0 overload
access-list 1 permit 192.168.1.0 0.0.0.255
!
The above sample config should work fine, moreso you can do alot of
interesting things with this setup just like any normal setup that is
utilizing a manually entered ip address.
Do not forget to disable DHCP on the modem, or set its ip address to 'static
assigned', some modems have a 'bridging or transparent mode', research your
modem and set it appropriately. The goal is to disallow the modem from
grapping the public ip address from your ISP, but instead pass all traffics
transparently to the router which will dynamically negotiate this ip address
with your ISP.
HTH
Godswill Oletu
CCIE #16464
----- Original Message -----
From: "Cacca Mucca" <caccamucca@gmail.com>
To: "Cisco certification" <cisco@groupstudy.com>; <ccielab@groupstudy.com>
Sent: Thursday, December 07, 2006 6:04 AM
Subject: Cisco 1841 with Cable Modem
> Hi,
>
> I was just wondering if there is a way to connect a Cisco Router to a
cable
> modem?
>
>
> FastEthernet port would not get IP address manually configured, as it
would
> have to be dynamically assigned.
> How would you route out traffic to an ethernet interface as it is not a
> point to point connection:
>
> ip route 0.0.0.0 0.0.0.0 fastethernet 0/0 <----- this is not going to
work
>
> TIA
>
> _______________________________________________________________________
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