How can i monitor the network speed?

ZAMO · 10-18-2007, 07:05 AM

Hi,
1.Is there a way to find out the speed of my office LAN? I am having RHEL server with proxy+IPtables running on it.IS there any tools available?

It could be handy for me to check the switches and cables for better performance?

2. I am having a squid server as proxy for my office. How can I find out the data transfer from my ISP?
The setup is , the router is connected to the server and server to the switch , and the switch inturn to other switches and workstations. I want to check the data transfer rate on both ways. i mean from ISP's router to Server and server to the clients?

3. Is there a way to find out which client is consuming a lot of bandwidth?

All suggestions are invited. Please Advise

farslayer · 10-18-2007, 09:24 AM

Setup MRTG and use the SNMP data from your switch.. you can then graph the bandwidth for the ports on your managed switch, router, ethernet interface of a Linux box, etc..

If your switches / routers support netflow, that would be a great source of data for what you want.
Netflow was practically designed for that specific purpose. OpenSource Netflow resources
http://neye.unsupported.info/
http://citeseer.ist.psu.edu/deri03nprobe.html

From wikipedias netflow entry..

Quote:

By analyzing flow data, a picture of traffic flow and traffic volume in a network can be built.