configuring cisco 1720 to work with broadband cable

Posted on 2004-08-27
Medium Priority
Last Modified: 2013-12-14
Config is below... I can ping www.cisco.com, DHCP interally works fine, but can't get pc's to route out ethernet 0... I need some help

Building configuration...

Current configuration : 984 bytes
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
hostname winebev-1720
enable secret 5 $1$SpK9$wUBMxRRsBzItXHg/Taxek1
memory-size iomem 25
no aaa new-model
ip subnet-zero
ip dhcp excluded-address
ip dhcp excluded-address
ip dhcp excluded-address
 --More--         !
ip dhcp pool 1
   lease 3
ip cef
interface Ethernet0
 ip address dhcp
 ip nat outside
interface FastEthernet0
 ip address
 ip nat inside
 speed auto
ip nat inside source list 1 interface Ethernet0 overload
ip nat inside source list internal interface Ethernet0 overload
 --More--         ip classless
ip route Ethernet0
ip route Ethernet0
no ip http server
line con 0
line aux 0
line vty 0 4

Question by:youngm40
LVL 36

Assisted Solution

grblades earned 750 total points
ID: 11920375
Hi youngm40,
> ip route Ethernet0
This is incorrect. The subnet mask should be You are also routing it out the internet interface.
Should this line be there at all?
LVL 43

Accepted Solution

JFrederick29 earned 750 total points
ID: 11929970
You are missing access-list 1 to define the traffic to be NAT'ed.

access-list 1 permit

As grblades suggests, the "ip route Ethernet0" command is not necessary.  Should be removed.

Author Comment

ID: 11930744
I figured it out late on friday 8/27, and got it to work... I had to add... the following below...

ip nat inside source list 1 interface Ethernet0 overload
ip nat inside source route-map cable interface Ethernet0 overload
===== not exactly sure which one of the above lines made it work, but I can figure that out easily=== I just wanted to let you guys know what I did...

access-list 1 permit
route-map cable permit 10
 match ip address 1
 match interface Ethernet0

as well as to the ip dhcp pool 1
I added DNS-Server XXX.XXX.XXX.XXX

I removed

ip route Ethernet0

because I knew that the ip route statement before that would encompass all traffic that comes in on the internal interface...

Thanks for all the help


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