?
Solved

Internet on LAN

Posted on 2011-02-28
12
Medium Priority
?
321 Views
Last Modified: 2013-12-07
For sometime now, I've realised that the internet on my LAN network has been running slow. We have T1 line from our ISP. I did run several  internet speed test  and on the average my download speed is 0.67Mbs and upload speed is about 0.90Mbs.
Our T1 line from our ISP should give us about 1.5Mbs download and upload. I've made several calls to my ISP, and as usual they claim it has nothing to do from their end. I've ran these internet speed test when there was no one on the LAN and the speed results did not change. My network is domain network with about 15 PCs. No changes has been done to the network recently.
Is there anything I could do again to prove to my ISP that the issue is with them?  OR is there any network tool (I will purchase if I have to) that I can run on my network that will tell me if the issue is on my network, or  if there is a PC on the network that is taking much of the bandwidth , infested with viruses or doing some sort of P2P sharing/downloading on the network? I do have up to date antivirus running on all PC's on my LAN.
0
Comment
Question by:ColesNet
10 Comments
 

Author Comment

by:ColesNet
ID: 35000527
I have to add that Internet is still slow on PC's that are not connected to the domain.
0
 
LVL 10

Expert Comment

by:NetExpert-Warszawa
ID: 35000538
You do not need to test LAN. Disconnect it. Connect a test PC directly to a router and disconnect the rest of the local network.
0
 

Expert Comment

by:daninline
ID: 35001323
do you have any network looping going on? are the switchs and computers set to the same data rate?

you could try sniffing with wireshark it might give you a clue to what's going on
0
Independent Software Vendors: 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!

 

Author Comment

by:ColesNet
ID: 35001751
I do not think the internet will work at all if it is a twork looping issue. Checked all cable connections from switch to router and all is rightly connected.
Will try snifing with wireshark and advise offered by NetExpert-Warzawa and update you all soon.
0
 
LVL 41

Expert Comment

by:noci
ID: 35002340
pchar might be of value, it can estimate bandwidth along a path.
http://www.kitchenlab.org/www/bmah/Software/pchar/
0
 
LVL 10

Expert Comment

by:NetExpert-Warszawa
ID: 35004510
If you want to know more about traffic your computers generate, use Trafmeter - http://trafmeter.com/
Wireshark shows packets. It is hard to see a larger picture. Trafmeter shows an amount of traffic. You can filter by IPs, ports etc.

You must connect it in a way it can listen to all traffic to the Internet. It could be a hub (not switch) next to the router or a switch that allows a monitor port.
0
 

Accepted Solution

by:
ColesNet earned 0 total points
ID: 35058885
I used Omnipeek, a network monitoring tool and was able to find the PC that was taking up a lot of my bandwidth. One PC was had limewire running and the other had streaming video.
Thanks for all help.
0
 
LVL 10

Assisted Solution

by:NetExpert-Warszawa
NetExpert-Warszawa earned 1200 total points
ID: 35059048
However it were us to suggest where and how to look for problems.
0
 

Author Comment

by:ColesNet
ID: 35124757
Hi NetExpert-Warszawa,
I am confused as to how you want me to distribute my points. If you had read my closing remarks, I had used a different network tool to resolve my issue. I did appreaciate your help that was why I decided to offer something for it.
If you believe, I did not treat you fairly, let me know and will reward you all points if that is going to make you happy.
0
 

Expert Comment

by:thermoduric
ID: 35163483
Starting the Auto-Close procedure on behalf of the asker.

Please see the Community Support Request for more details on why this action was taken.
http://www.experts-exchange.com/Q_26868689.html

- thermoduric -
EE Community Support Moderator
0

Featured Post

[Webinar On Demand] Database Backup and Recovery

Does your company store data on premises, off site, in the cloud, or a combination of these? If you answered “yes”, you need a data backup recovery plan that fits each and every platform. Watch now as as Percona teaches us how to build agile data backup recovery plan.

Question has a verified solution.

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

Unable to change the program that handles the scan event from a network attached Canon/Brother printer/scanner. This means you'll always have to choose which program handles this action, e.g. ControlCenter4 (in the case of a Brother).
In this article I will be showing you how to subnet the easiest way possible for IPv4 (Internet Protocol version 4). This article does not cover IPv6. Keep in mind that subnetting requires lots of practice and time.
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
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…

621 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