?
Solved

Network Administrator Nightmare "Network Looping"

Posted on 2012-12-27
11
Medium Priority
?
369 Views
Last Modified: 2013-11-16
I wish to know how can i detect the network is looping in my network and any free tools can help us to analyse the network down is because of network looping .
0
Comment
Question by:warriorsTeah
[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
  • 4
  • 3
  • 3
  • +1
11 Comments
 
LVL 44

Expert Comment

by:Darr247
ID: 38723957
What hardware do you have for switches and routers?

Do you have Border Gateway Protocol (BGP) and/or Spanning Tree Protocol (STP) available?
0
 

Author Comment

by:warriorsTeah
ID: 38723980
We just have 2 switch in same LAN
0
 
LVL 44

Expert Comment

by:Darr247
ID: 38724104
The only way I know of to make a loop with just 2 switches is to have 2 or more ethernet cables connecting between those 2 switches. Have you eliminated that possiblity?
0
Cyber Threats to Small Businesses (Part 1)

This past May, Webroot surveyed more than 600 IT decision-makers at medium-sized companies to see how these small businesses perceived new threats facing their organizations.  Read what Webroot CISO, Gary Hayslip, has to say about the survey in part 1 of this 2-part blog series.

 

Author Comment

by:warriorsTeah
ID: 38724108
Yes
0
 
LVL 7

Expert Comment

by:tolinrome
ID: 38724113
How do you know it is looping, are you experiencing any problems? You could use wireshark which many people use and it inspects packets on the network, you can see where they are coming from and going. http://www.wireshark.org/
0
 
LVL 7

Expert Comment

by:tolinrome
ID: 38724122
let us know what the problem is and perhaps we can help out.
0
 

Author Comment

by:warriorsTeah
ID: 38724163
Can you guide me what is the step to detect or analysis using wireshark ,i already install i ca. See many component they..don't knowhow to start
0
 
LVL 7

Expert Comment

by:tolinrome
ID: 38724245
wireshark takes some time to learn, you'll have to just go with the directions and just play with it until you see how it works. Look into Solarwinds as well, they have good free tools.

Are you having a specific problem or just interested in monitoring the network?
0
 
LVL 8

Expert Comment

by:RGRodgers
ID: 38724311
The net of it is that you need to answer the questions the experts are asking in detail, one by one.  They asked about the configuration of your network.  They gave specific information regarding how networks may loop.  They asked about how you noticed the loop, what messages you have received, etc.  You should respond to each of these questions in kind and in detail so that they can best assist you.  Wireshark is a complex tool and may be needed to resolve this problem, but that cannot be known until you provide the details being requested...RG
0
 
LVL 44

Accepted Solution

by:
Darr247 earned 2000 total points
ID: 38725269
Laura Chappell has some good free training videos at
https://www.lcuportal2.com/index.php?option=com_content&view=category&layout=blog&id=49&Itemid=75
note they're listed in reverse order. i.e. The bottom FLV file is part 1.
I renamed them as I downloaded them so they appear in the correct order in Explorer.
e.g.Wireshark 101 FLV files renamed
I use the K-Lite Codec Packs to make FLV files open in Windows Media Player, but according to google, http://playflv.com/downloading-playflv-exe will let you download the free VLC Media Player (about 31MB) if nothing opens to play FLV files when you double-click on them. You don't have to accept any of the optional programs (just click the Decline button on the left), accept the agreement, and it should take up about 80MB of disk space installed.
0
 

Author Closing Comment

by:warriorsTeah
ID: 38769335
Actually i just want to learn how to detect the looping to prepare this happen on future ,because i have facing few time in my different client site ,usually we will check the switch indicator can know already but i still need to learn how to analysis the packet.thank you
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Ready to improve network connectivity? Watch this webinar to learn how SD-WANs and a one-click instant connect tool can boost provisions, deployment, and management of your cloud connection.

Question has a verified solution.

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

Getting to know the threat landscape in which DDoS has evolved, and making the right choice to get ourselves geared up to defend against  DDoS attacks effectively. Get the necessary preparation works done and focus on Doing the First Things Right.
Keystroke loggers have been around for a very long time. While the threat is old, some of the remedies are new!
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
Suggested Courses

770 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