Solved

Connecting ISP Bridge to CPE Router

Posted on 2015-02-19
3
409 Views
Last Modified: 2016-11-23
Hello. I have an Ethernet over Copper circuit that terminates into an Adtran 838 Bridge. I have to use a Cisco router to connect the circuit into my firewall. My router (Cisco 1841) has two (2) FastEthernet (FE 0/0 & FE 0/1) Interfaces. FE 0/0 is programmed and connected to the CPE WAN IP of the Adtran Bridge. The other Interface (FE 0/1) is programmed to the gateway LAN subnet provided by the ISP, and connected to my firewall. My firewall is a Dell SonicWall NSA3500.

 I am unable to ping the gateway of the LAN subnet provided by the ISP from behind the firewall. I can ping the IP addresses of both FastEthernet interfaces from the router console. From the router console I cannot ping anything on The Internet.

I am not a Cisco expert, but, I would imagine I need the following to happen:

1.  I need the ability to ping the ISP LAN Subnet Gateway IP Address from behind my firewall.
2.  I need the ability to ping anything pingable on The Internet from the router console.

Thanks in advance for any assistance offered.
0
Comment
Question by:QuinnCushing
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 62

Expert Comment

by:gheist
ID: 40656046
Can you ping ISP gateway from router? And a machine on the LAN?
0
 

Accepted Solution

by:
QuinnCushing earned 0 total points
ID: 40690804
I could ping from the router to the ISP gateway. I was unable to ping the ISP gateway from the LAN.
I made a change on the firewall, to allow ICMP packets to pass from the LAN to the WAN via NAT translation.
All is working as expected now.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In the modern office, employees tend to move around the workplace a lot more freely. Conferences, collaborative groups, flexible seating and working from home require a new level of mobility. Technology has not only changed the behavior and the expe…
DECT technology has become a popular standard for wireless voice communication. DECT devices are not likely to be affected by other electronic devices and signals because they operate in a separate frequency-band.
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…
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…

729 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