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Obtaining an ip address automatically (cable modem)?

arisythila
Level 1
Level 1

Hello, I am new to the forums, I've searched Cisco's site for what im looking for, and also tried to google it, after looking for a long long time, I decided to ask.

I am trying to get my Cisco 2600 Series router to do just that, route. I want to setup my cable modem on my Ethernet0/1 port, (needs to obtain IP automatically) and then setup DHCP on Ethernet0/0 (I may have figured this out, not sure).

Any help would be awesome, Im sure someone has done this before, I just maybe not looking in the right spot.

This is what I have so far.

//code//

!

version 12.3

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname Mike

!

enable secret 5 /

enable password

!

ip subnet-zero

no ip routing

!

!

!

ip dhcp pool Mypool

network 10.10.10.0 255.255.255.0

default-router 10.10.10.1

!

ip audit notify log

ip audit po max-events 100

no ftp-server write-enable

!

!

!

!

interface FastEthernet0/0

ip address 10.10.10.1 255.255.255.0

no ip redirects

no ip unreachables

no ip route-cache

speed auto

full-duplex

!

interface Serial0/0

no ip address

no ip route-cache

shutdown

!

interface FastEthernet0/1

ip address gets automatically from cable modem

no ip redirects

no ip unreachables

ip nat inside

no ip route-cache

speed auto

full-duplex

!

//end of code//

Thanks again, for the help.

~Mike

3 Replies 3

feng.yan
Level 1
Level 1

Hi, Mike,

If you want to configure a Cisco router as a DHCP client, you can have a look at the following url:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt1/1cfdhcp.htm#wp1001435

and if you want to the router be a DHCP server, the following url may be useful to you:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt1/1cfdhcp.htm#wp1009276

btw, what's the reason for that you have a command in your config shows "no ip routing" ?

no ip routing is something that was in there before hand. Im not sure why its there.

Im not exactly sure if this is what im looking for. Let me elaberate a bit more.

I use this 2600 Series for VOIP currently. Im using a Linksys router, with DMZ on the router, I basically want the 2600, to do what my Linksys router does, so I can just use one of them instead of both.

I hope this makes more sense.

Thanks again for the help.

~Mike

Hi

from my understanding of your network:

======

ip dhcp pool Mypool

network 10.10.10.0 255.255.255.0

default-router 10.10.10.1

!

interface FastEthernet0/0

ip address 10.10.10.1 255.255.255.0

ip nat inside

!

interface FastEthernet0/1

ip address negotiated

ip nat outside

ip nat inside source list 1 interface f0/1 overload

access-list 1 permit 10.10.10.0 0.0.0.255

Hope it helps.

Pls rate helpful posts

Regards

JD

Review Cisco Networking products for a $25 gift card