[27456] in resnet
Re: ResNet Bandwidth Standards
daemon@ATHENA.MIT.EDU (Frank Bulk)
Sun Mar 11 22:42:30 2012
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Date: Sun, 11 Mar 2012 21:40:41 -0500
Reply-To: Resnet Forum <RESNET-L@listserv.nd.edu>
From: Frank Bulk <frnkblk@iname.com>
To: RESNET-L@listserv.nd.edu
Based on what was shared so far, peak usage ranged from 150 to 250 kbps per
student, most of them on the lower end.
Frank
From: Resnet Forum [mailto:RESNET-L@LISTSERV.ND.EDU] On Behalf Of Andrew
Wolf
Sent: Friday, March 09, 2012 10:11 PM
To: RESNET-L@LISTSERV.ND.EDU
Subject: Re: ResNet Bandwidth Standards
Hi Listserv,
Since I've learned so much from others experiences on this listserv, I
thought I would what I've learned about student bandwidth.
We use 100 mbps per 1000 students - which translates to roughly 4k-5K
devices on the student network (ipads, pc's,macs, gaming consoles, iphones,
smartphones etc....) this year we wound up with 2-3 devices per student
average. Some have many more.
We currently run a 200 mbps pipe. That's more than adequate for 2000
students in a residential college.
Before the Netequalizer was installed, we were thinking that we would have
to upgrade to 300 mbps by mid this year - at this point I don't see having
to upgrade until sometime in 2014 unless something drastic changes in the
internet. Maybe not even then.
What you really need to consider is how the bandwidth is shared. We found
the perfect solution in the NetEqualizer.
It's "Behavior-Based" shaping algorithms allow for a very high number of
devices all sharing the same internet pipe, and slowing the "Bandwidth Hogs"
while allowing those using smaller streams to pass unhindered. It's really
a great product, and will pay for itself in no time at all. (It's pretty
inexpensive to purchase and yearly maint is hardly anything compared to the
"Deep packet inspection" devices.)
A great deal of wireless ISP's use NetEqualizers to keep customers from
screaming about slow internet access - many colleges and universities are
using it for the same reasons. It's true power (IMHO) comes from
connection limits - each student is limited to 20 connections (10 up/10
down) which prevents P2P from doing much of anything - no RIAA notices and
keeps the pipe clear for others. Since the connections are only tracked for
a second or two - the students don't see themselves as restricted - but yet
it works amazingly well. This has really cleaned up the traffic on the
internet pipe, and it what has allowed us to remain at 200 mbps....This
setting can be modified, we just settled on following limits which have
worked well for us: wireless users 20, Wired 30, Gamers 60. (Some game
consoles use torrents for legit updates.)
Overall, the student segment is allocated a bandwidth pool of 180 mbps -
when traffic reaches 85%, the box begins slowing the largest "Hogs" packets
by fractions of a second until they start to slow down, thus allowing
everyone to get decent response times. If the link isn't saturated beyond
85%, people get blazing fast responses and downloads.
It's become very apparent to me that much of the traffic clogging our system
prior to the installation of the NetEqualizer was frivolous crap
communications, P2P etc.... even with the old Packeteer supposedly doing
it's thing.....since we cranked down the connection limits, the students
machines are not free to make hundreds or thousands of connections thereby
keeping the pipe clear for others. It's really been amazing. The old
packeteer didn't perform anywhere near this efficiently.
I am a strong advocate of this product - I would be happy discuss how we use
it/how it works with anyone who is interested - this is the best product I
have ever seen in this arena. It's truly a set and forget device - it does
its job 24x7x365....no issues.
I understand this may not be a big issue for those that have massive
bandwidth to the internet, but in some cases like ours; that bandwidth is
very expensive and why purchase more than you really need?
Hope this helps provides some food for thought....
Andrew Wolf
Telecommunications Manager
Linfield College
971-237-3184
From: Resnet Forum [mailto:RESNET-L@LISTSERV.ND.EDU] On Behalf Of
John.Kissinger
Sent: Wednesday, March 07, 2012 10:01 AM
To: RESNET-L@LISTSERV.ND.EDU
Subject: ResNet Bandwidth Standards
Colleagues
We are in the midst of expanding our residence population and working on
standards of service.
Does anyone use a formula for calculating minimum or optimum bandwidth for
ResNet, such as bandwidth per resident student, or a similar approach?
John Kissinger
Director of Information Technology
Alvernia University
Desk: 610 796 8392
Cell: 610 587 1759
Email: john.kissinger@alvernia.edu
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