Solved

Need help with network traffic analysis

Posted on 2014-10-02
6
269 Views
Last Modified: 2014-10-20
What is the easiest way to ascertain which users on a network may be using large amounts of bandwidth?

I suspect one of the users is having high utilization at times and causing havoc with our VoIP calls. Actually I suspect the issue lies with the ISP but they refuse to acknowledge it. All of the vendors VoIP QoS settings are active in our router and the issue persists. Anyway I'm now down to seeing if it can be pinned on a user at this point.

This is not a domain environment. We have about 40 VoIP Phones, 40 workstations and various mobile devices. The switch is a CISCO SF200. I've gotten PRTG Traffic Grapher running and I've configured the switch to mirror traffic from the port that connects our router to port 48 which is connected to computer running PRTG. I think Im close to getting the info I need but not quite there yet..I guess what Im asking is "Is there a simpler way to be doing this that I'm overlooking?"
0
Comment
Question by:BIZNETplus
[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
6 Comments
 
LVL 14

Expert Comment

by:Natty Greg
ID: 40358639
Capsa is a freeware that will let you know who is eating up your bandwidth.
0
 
LVL 19

Assisted Solution

by:*** Hopeleonie ***
*** Hopeleonie *** earned 250 total points
ID: 40358723
Wireshark is the best software for this.
0
 
LVL 13

Accepted Solution

by:
Rizzle earned 250 total points
ID: 40359036
We use Wireshark internally to investigate issues like this. Wireshark is particularly good because not only does it tell you the IP from where the traffic is originating but also what application/protocol is associated with the traffic.
0
Do you have a plan for Continuity?

It's inevitable. People leave organizations creating a gap in your service. That's where Percona comes in.

See how Pepper.com relies on Percona to:
-Manage their database
-Guarantee data safety and protection
-Provide database expertise that is available for any situation

 

Author Comment

by:BIZNETplus
ID: 40363422
With wireshark would you still need to set up port mirroring on the switch to see all the traffic?
0
 
LVL 13

Expert Comment

by:Rizzle
ID: 40363430
Yes that's correct so it can analyse the traffic coming from those ports you specify or if you set all the ports to port mirror.
0
 
LVL 19

Expert Comment

by:*** Hopeleonie ***
ID: 40364208
Yes :-)
0

Featured Post

Is your NGFW recommended by NSS Labs?

Ours is! NSS Labs Next Generation Firewall Test gives the WatchGuard Firebox M4600 a "Recommended" rating! Curious where your NGFW landed on the  Security Value Map? See the map and download the full report today!

Question has a verified solution.

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

Introduction Many times we come across a slowness or instability between two hosts, and almost always we blame the poor networking guys, just because they're an easy target.  Sometimes we forget that other factors including disk bottlenecks, CPU …
Use of TCL script on Cisco devices:  - create file and merge it with running configuration to apply configuration changes
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…

717 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