Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


configuration syntax

configuration syntax

configuration syntax

I am familiar with routers, but have not done much with Cisco. I am trying to accomplish the following, but am not sure of the syntax:

Setting: My network is using the network. I have a Cisco CISCO1941 router between my network and a foreign network ( I have set up NAT on the Cisco router to the addresses are presented to my network as

Goals: I want a computer on my network to talk to a computer on the foreign network. I also want to be able to logon to the router from a workstation on our network.

Computer on my network \_______/ Cisco \_______continued..
my management workstation / \ Router/

_______/Cisco\/ nat\________/workstation\
\Router /\ to / \ /

I have the following code:

interface GigabitEthernet0/0
ip address
ip nat outside
ip virtual-reassembly in
duplex half
speed 10
no mop enabled
interface GigabitEthernet0/1
ip address
ip access-group 102 out
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
ip nat inside source static
ip route
access-list 101 permit ip host host
access-list 102 permit ip host host
access-list 102 permit ip host host

Neither goal is working. Any ideas would be welcome.

RE: configuration syntax

What is the subnet mask on the device addressed with

You have this route: ip route
But you don't appear to have any route telling the router how to find

You have this line in your description:
workstation\\Router /\ to / \ /
But your router's Gi0/1 address is, so it won't be looking for at layer3 and therefore won't send anything to to route it further.

RE: configuration syntax

To further clarify, this Cisco router (interface GigabitEthernet0/0) is connected to an Enterasys router which has the following subnets defined: subnet where the computer to talk to foreign network is subnet connected to Cisco router subnet with my workstation to connect to router.
The subnet is directly connected to the Enterasys router.
I also have a static route on the Enterasys router to point back to the Cisco:
[ip route recursive 1]

From what you said, I am thinking I may need to add a route for the 172.23.1.x traffic to the interface address. Which makes sense:
[ip route]

However, that doesn't explain why the NATed devices can't talk to the workstation at 172.23.0.x [i.e. cannot talk to]

Am I missing something?

RE: configuration syntax

I see a host NAT, but not the subnet...


ip access-list extended IP-Options-and-Powerball
deny ip any any winning-powerball-ticket
permit ip any any option any-options
class-map ACL-Options-and-Powerball
match access-group name IP-Options-and-Powerball
policy-map CoPP-POLICY
class ACL-Options-and-Powerball
service-policy input CoPP-POLICY

RE: configuration syntax

Thanks for your answer. It seems I was missing a return route back from the foreign system. I was able to get things working.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!


Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close