Solved

Network transmission speed

Posted on 2006-11-16
1
1,515 Views
Last Modified: 2008-03-10
Hi Experts,

I'm in the process of trying to measure the transmission speed of my network. I have difficulty understanding the correlation between the network capability (1 gigabit Ethernet) and the transmission speed of data (35 megabyte per second). What should the transmission speed be in megabyte per second on a 1 gig capable network (1 gig switch and 1 gig NICs in both servers)?

Also, I've found some tools that can do point to point testing on a LAN - does anyone know where I can find a tool that can show me the possible network capacity, the network usage and also the type of data that is occupying the LAN?  

If someone could perhaps help regards the above questions I'd be grateful. Many thanks!
0
Comment
Question by:avdvyver
1 Comment
 
LVL 27

Accepted Solution

by:
pseudocyber earned 250 total points
ID: 17955422
Break it down to bits.

GB      1
MB      1,024 (x1024)
KB      1,048,576 (x1024)
B      1,073,741,824 (x1024)
b      8,589,934,592 (x8)

You have roughly 8.5 billion bits.  Your network can move 1Gb in one second.  (One Billion bits in one second).  So, therefore, a 1Gb network can move 8.5 Billion bits in about 8.5 seconds.

Note - that is a maximum THEORETICAL speed.  You have to add protocol overhead - which is layer 2 headers, layer 3 headers, etc.  So, say you lose 20% efficiency - because not all of that going through will be data - a lot will be protocol information.  So, multiply your 8.5 seconds by 1.2 and you're up to 10 seconds.

Again - this assumes max theoretical.  You will also be limited by hardware - disk i/O, RAM, CPU, NIC efficiency, other traffic on the network, etc.

Now, if you just want to see utilization, cpu, memory, errors, etc. you can use an SNMP monitoring tool like SolarWinds http://www.solarwinds.net.

If you want to see protocol information, this is a little more involved and requires equipment which actually sees the data and monitors it - sort of like a sniffer or packet capture.  If you're using Cisco gear, you could use programs/utilities like Netflow and NTOP and MRTG.

Hope this helps.
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Join & Write a Comment

This is an article about my experiences with remote access to my clients (so that I may serve them) and eventually to my home office system via Radmin Remote Control. I have been using remote access for over 10 years and have been improving my metho…
PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
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.

746 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

Need Help in Real-Time?

Connect with top rated Experts

9 Experts available now in Live!

Get 1:1 Help Now