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Cisco 1805 hwic-cable-modem-d-2 basic configuration for residential cable

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1,849 Views
Last Modified: 2013-12-27
Hey folks,
I got my hands on a Cisco 1805 integrated services router with hwic-cable-modem-d-2 that I want to use at my house.

I have some experience with Pix firewalls and basic switch configuration for both IOS and CatOS, so I figured I should be able to get this 1805 up and running but I'm beyond lost when it comes to the configuration on this guy.

I called Comcast and got them to plugin the mac address for the cable-modem, it's pulling down an IP address and I'm able to ping some external stuff from the router console.  I tried configuring one of the fast ethernet interfaces, adding a route and plugging a laptop into FE0/0 but it doesn't appear to be routing.

I've looked at various configuration examples and, like I said...I'm lost.  What's even more confusing is that the cable modem seems to have two seperate mac addresses and I'm not sure how this factors into the config.  If anyone can point me in the right direction to get this thing working, I'd appreciate it.

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Author

Commented:
will,
I tried playing around with that config and I didn't have much luck with it.  It looks like fastethernet 1 provides internet connectivity and fastethernet0 is configured for the lan...that's my best guess.  In my case I think I would want to replace the commands for fastethernet1 with cable-modem0/0/0

it also looks like LAN/FE0 is natting inside and INTERNET/FE1 is natting outside.  I'm not sure I understand the command "ip address dhcp client-id FastEthernet0"  IP address dhcp sets the interface to automatically pull an IP from a dhcp server but what is the client-id fastethernet0 part?  is that something to identify the interface to the DHCP server?

When I plugged in the config however; I used 10.10.255.x in lieu of 192....and I started getting ip address conflict from somewhere...didn't quite understand where this was coming from.

yeah I'm lost.

Author

Commented:
also I wonder if I must assign an "inside" address to the cable modem in order for routing.  Really the information on the hwic-cable-modem is pretty scarce from what I can find.

Author

Commented:
there might be some typos in this because I couldn't copy/paste from console so I had to type it out long hand.

As it stands, I'm able to ping the DNS servers from the router, I can ping FastEthernet0/0 from a workstation but I can't traverse the router from the workstation...not sure what I'm missing.

Version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname fubar
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1sux0r@c15c0
enable password myPassword
!
no aaa new-model
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 10.10.255.1
!
ip dhcp pool LAN
import all
network 10.10.255.0 255.255.255.0
default-router 10.10.255.1
!
!
ip cef
no ip domain lookup
ip domain name comcast.net
ip name-server 68.87.71.226
!
no ipv6 cef
multilink bundle-name authenticated
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
Interface FastEthernet0/1/0
shutdown
!
Interface FastEthernet0/1/1
shutdown
!
Interface FastEthernet0/1/2
shutdown
!
Interface FastEthernet0/1/3
shutdown
!
Interface Cable-Modem0/0/0
description Comcast-Link
bandwidth 4500
ip address dhcp
ip access-group 100 in<------I've taken this line out
no ip redirects
no ip unreachables
non ip proxy-arp
ip nat outside
ip virtual-reassembly<-------I've taken this line out also
no cdp enable
arp timeout 30
!
Interface FastEthernet0/0
Description LAN
ip address 10.10.255.1 255.255.255.0
ip access-group sdm_fastethernet0_out out<------I've taken this line out
ip nat inside
ip virtual-reassembly<------I've taken this line out
duplex auto
speed auto
no mop enabled
!
Interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
Interface Vlan1
no ip address
shutdown
!
ip forward-protocol nd
!
ip route 0.0.0.0 0.0.0.0 cable-modem0/0/0
!
!
no ip http server
no ip http secure-server
ip nat inside source list 1 interface FastEthernet0/0 overload
!
access-ist 1 permit 0.0.0.0 255.255.255.0
no cdp run
!
!
!
!
!
control-plane
!
!
!
!
line con 0
line aux 0
line vty 0 4
password password
login
!
scheduler allocate 20000 1000
!
webvpn cef
end

Author

Commented:
I got it figured out.  I'll post up the configuration later for reference purposes.
Great..sorry for the late response
Commented:
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