Solved

Cisco Routing Problem

Posted on 2007-11-21
9
601 Views
Last Modified: 2012-05-05
I have a simple setup that I cannot get my Cisco router to route traffic correctly.  I have two interfaces on my router.  Ethernet0/0 is 10.0.0.0 network and Ethernet0/1 is 198.x.x.x /28 network.  When I am on the router via the console I can ping addresses through the Ethernet0/1 interface.  If I am on a pc I cannot.  I can ping the ip address of the Ethernet0/1 interface successfully, but nothing on the other side of it.  If I do a tracert, everything dies at my router.  What am I doing wrong?
0
Comment
Question by:tammieR
  • 4
  • 4
9 Comments
 
LVL 50

Expert Comment

by:Don Johnston
Comment Utility
Do the devices have the correct default-gateway defined? They should be using the interface of the router they're connected to as the gateway.
0
 

Author Comment

by:tammieR
Comment Utility
The router is connected to my 4510 switch.  The interface on the router that is connected to the 4510 is ip address 10.128.1.1.  I setup the default gateway on my pc to 10.128.1.1.  I am also connected to the same 4510 switch.  The other interface on the router is 198.x.x.x /28 subnet.  
0
 
LVL 50

Expert Comment

by:Don Johnston
Comment Utility
And what about the devices on the 198.x.x.x/28 network? Are their default-gateways correctly set?
0
 

Author Comment

by:tammieR
Comment Utility
I am testing an ISP that has given me a fiber modem.  I have connected the fiber modem to a switch hanging off of the 198.x.x.x/28 interface.  The default gateway that was given to me by the ISP is 198.30.100.x/28.  I can ping that default gateway ip from the router but cannot ping it from my PC.  My pc is 10.96.10.x/8.  I can ping the router interface for 198.x.x.x but cannot ping the default gateway ip address of 198.30.100.x/28 that was given to me by the ISP.  The default gateway set on the router is Ethernet0/1, which is the 198.x.x.x port.
0
How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

 
LVL 50

Expert Comment

by:Don Johnston
Comment Utility
Okay, gotcha.

I would not use an ethernet interface as a default-gateway. Use the actual IP address of the next hop router.

0
 

Author Comment

by:tammieR
Comment Utility
I changed the default route to the ip address that was given to me by the ISP and it didn't make a difference.  I can ping anything I want from the router but cannot ping anything through the router.  I don't get it.
0
 
LVL 50

Accepted Solution

by:
Don Johnston earned 500 total points
Comment Utility
You're doing NAT, right?

Can you post the config of the router?
0
 
LVL 7

Expert Comment

by:knightrider2k2
Comment Utility
I might be repeating some of other's comments, but
make sure there is a default gateway on the router ( ip route 0.0.0.0 0.0.0.0 x.x.x.x......
check that you have configured the outside interface with correct subnet
make sure you are NATing

Check access lists
check if there is any firewall software on the pc
0
 

Author Closing Comment

by:tammieR
Comment Utility
I am such a moron.  I forgot about the NAT.  Thanks for the reminder.
0

Featured Post

6 Surprising Benefits of Threat Intelligence

All sorts of threat intelligence is available on the web. Intelligence you can learn from, and use to anticipate and prepare for future attacks.

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
Internet Speed Test 5 65
1 WAN to 2 LAN 4 59
MPLS Network Question 2 31
WAN IP Conflict on Sonicwall 5 56
I have seen some questions on problems with SSH/telnet access to Cisco routers that may occur despite the fact that from a PC connected to your LAN, Internet connectivity is in place and users can access Internet sites without any issues.  There are…
PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

771 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now