[2 days left] What’s wrong with your cloud strategy? Learn why multicloud solutions matter with Nimble Storage.Register Now

x
?
Solved

Router can not access WAN

Posted on 2014-01-24
19
Medium Priority
?
79 Views
Last Modified: 2015-05-11
I am having an issue with a network setup.  It could be what I am trying to accomplish.

I have a 100mb( fulldp ) connection coming on to my site.

I have the single connection connected from the 100mb circuit going to a un-managed 3com switch.

On the 3com switch I have 2 devices connected.  A sonicwall md250 and a linksys router.  

Each device is nating IP addresses onto the same subnet.  

Sonic wall -  x.x.x.178 to x.x.x.283 on a /28 subnet
linksys - x.x.x.290 on the same /28 subnet.

The problem is the firewall is working fine but when I plug in the linksys router it can not get out the internet.  I have checked the gateway address and range addresses and everything is fine.

If I put my laptop on the same subnet and give it the static IP of the linksys router it works  fine.  I have tried multiple routers ( stock linksys and ddwrt ) and same issue.  

Funny thing that I noticed is that the first time i hooked the ddwrt router up it worked then on a reboot of the router it stopped communicating with the gateway.

Is it the ARP table getting messed up having 2 routers on the same subnet?

Any help would be great.  My next stop was to either put a managed switch in or a router to see what is going on.

Jerry
0
Comment
Question by:adminjam
[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
  • 10
  • 4
  • 3
  • +1
19 Comments
 
LVL 11

Expert Comment

by:Miftaul
ID: 39807191
Sonicwall and linksys are both connected directly to the internet through a unmanged switch. Do you mean, when linksys is connected, the sonicwall also stops working. Or the devices behind linksys only disconnects.

What gateway ip is configured on the linksys, is that the isp gateway.
0
 

Author Comment

by:adminjam
ID: 39807244
Yes both devices are connected directly to the internet through the unmamanged switch.  

Just the linksys stops working the sonicwall works fine.

Both devices are using the ISP gateway.
0
 
LVL 12

Expert Comment

by:Infamus
ID: 39807250
If the ISP is directly connected to the firewall, the router's gateway has to be the IP of the firewall.
0
Veeam Task Manager for Hyper-V

Task Manager for Hyper-V provides critical information that allows you to monitor Hyper-V performance by displaying real-time views of CPU and memory at the individual VM-level, so you can quickly identify which VMs are using host resources.

 

Author Comment

by:adminjam
ID: 39807258
Nope the ISP is connected to the switch as well as both routers.
0
 
LVL 12

Expert Comment

by:Infamus
ID: 39807262
On the 3com switch I have 2 devices connected.  A sonicwall md250 and a linksys router.  

So you mean three devices are connected to the switch?
0
 
LVL 11

Expert Comment

by:BillBondo
ID: 39807319
I know that the Linksys needs to be in router mode not gateway mode. Just a thought
0
 

Author Comment

by:adminjam
ID: 39807321
Ok yes 3 devices.  The ISP's router, Sonciwall and Linksys router.
0
 

Author Comment

by:adminjam
ID: 39807322
Yeah it is in router mode.  It was acting as a router on my old network.
0
 
LVL 12

Expert Comment

by:Infamus
ID: 39807330
Sonic wall -  x.x.x.178 to x.x.x.283 on a /28 subnet
linksys - x.x.x.290 on the same /28 subnet.

x.x.x.178/28 is x.x.x.177-190

Is this typo?

It should be x.x.x.278/28, correct?


In that case......can you verify this?

x.x.x.277/28  ------ISP router

x.x.x.278/28  ------FW WAN IP  x.x.x.277 GW

x.x.x.290/28 -------Secondary Router x.x.x.277 GW
0
 

Author Comment

by:adminjam
ID: 39807342
yes sorry for the typo it should be 178..
0
 

Author Comment

by:adminjam
ID: 39807347
isp router is - 177/28

Sonciwall is - 178/28 to 183/28

Lynksys is - 190/28
0
 
LVL 12

Expert Comment

by:Infamus
ID: 39807358
And what is the gate way or default route for Sonicwall and Lyncsys?
0
 
LVL 11

Expert Comment

by:Miftaul
ID: 39807479
Can you ping the linksys WAN IP from within sonicwall.
0
 
LVL 11

Expert Comment

by:BillBondo
ID: 39807700
Does linksys work alone without sonic?
0
 
LVL 11

Expert Comment

by:BillBondo
ID: 39807725
I believe your subnets over lap and are incorrect. Should be 176 and 192???
0
 

Author Comment

by:adminjam
ID: 39807754
The ISP gave me the subnet if I run it through the calculator online it come up correct as a class A with IP's from 176 to 191 with 191 being the broad cast.

The ISP assigned the gateway as 177 so I have addresses from 176 to 190 to use.
0
 

Author Comment

by:adminjam
ID: 39808008
Missed a couple of questions:

Yes I can ping the lynksys from the sonicwall and from my laptop.

Never had a chance to test the lynksys by itself as we are in production on the sonicwall.

the default gateway of the lynksys and the sonciwall is .177
0
 

Accepted Solution

by:
adminjam earned 0 total points
ID: 40762966
This ended up being a problem with the SonciWall causing an ARP blackhole where it was advertising that it owned all IP addresses for the LAN segment.  There is a hidden menu where you can turn this function off.
0
 

Author Closing Comment

by:adminjam
ID: 40769997
I called SoncWall support after getting to answer on this forum.
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

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

This article lists the top 5 free OST to PST Converter Tools. These tools save a lot of time for users when they want to convert OST to PST after their exchange server is no longer available or some other critical issue with exchange server or impor…
I don't pretend to be an expert at this, but I have found a few things that are useful. I hope that sharing them here will help others, so they will not have to face some rather hard choices. Since I felt this to be a topic of enough importance and…
To show how to create a transport rule in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Rules tab.:  To cr…
To show how to generate a certificate request in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Servers >> Certificates…
Suggested Courses

656 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