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Hello all,

We are getting close to maxing out our Internet circuit for our residence halls so I’m looking to add some bandwidth. I am curious how much bandwidth other schools are giving to students in their dorm rooms and how they came to that decision. Replies off list are also welcome  for anyone who doesn’t want to put that info out there.  I think the results will be helpful in helping me justify the increase in cost for the additional bandwidth. The following info would be most helpful.:

Total number of users in dorms?

Total Internet bandwidth reserved for residence halls (to your ISP):

Do you have a cap (Mbps) per users?  If so, at what speed?

If you cap, do you set it at the switch port using QOS (wireless controller for wireless) or use an appliance such as a Packetshaper or Firewall?

When do you decide to upgrade your bandwidth? When you hit 80% or do you wait until you bump up against your limit?

If your connection is over 1 gig to your ISP, are you using a 10Gig handoff or multiple one gig handoffs bundled together?

As a general rule of thumb, I’m going by Netflix bandwidth requirements and making sure any student can get an HD Stream while watching Netflix.  https://help.netflix.com/en/node/306 . We use an appliance to do our bandwidth policing at the edge for wired and wireless.


Thank you,

-- Vlad Network Manager Ramapo College ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

Comments

On Feb 25, 2014, at 12:24 , Vlade Ristevski wrote: > > Total number of users in dorms? Around 6500. > > Total Internet bandwidth reserved for residence halls (to your ISP): We do not reserve any of our bandwidth just for residence halls. The residence hall networks are treated equally with other regular portions of our campus network and compete equally for off-campus bandwidth resources. > > Do you have a cap (Mbps) per users? If so, at what speed? No. > > If you cap, do you set it at the switch port using QOS (wireless controller for wireless) or use an appliance such as a Packetshaper or Firewall? > > When do you decide to upgrade your bandwidth? When you hit 80% or do you wait until you bump up against your limit? We definitely look to upgrade before we achieve congestion, but sometimes opportunities to upgrade come along even before that happens in terms of favorable pricing, technology upgrades, partnerships, etc. We haven’t done an upgrade where congestion was involved in quite some time. > > If your connection is over 1 gig to your ISP, are you using a 10Gig handoff or multiple one gig handoffs bundled together? We have moved to all 10G handoffs to provide burstable capacity if needed. -- Julian Y. Koh Acting Associate Director, Telecommunications and Network Services Northwestern University Information Technology (NUIT) 2001 Sheridan Road #G-166 Evanston, IL 60208 847-467-5780 NUIT Web Site: PGP Public Key: ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Thus spake Vlade Ristevski (vristevs@RAMAPO.EDU) on Tue, Feb 25, 2014 at 01:24:34PM -0500: > > Total number of users in dorms? Close to 10k. > Total Internet bandwidth reserved for residence halls (to your ISP): Each building connects in at 2x1G. But, it is not "reserved". It connects no differently than any other typical campus building. > Do you have a cap (Mbps) per users? If so, at what speed? no > If you cap, do you set it at the switch port using QOS (wireless > controller for wireless) or use an appliance such as a Packetshaper > or Firewall? We found that these appliances cost more to buy and maintain than the bandwdith they "save" especially since we've been told that our dorm network needs to perform better than the private sector. The cable co here typically does ~20Mbit/sec as the base rate. > When do you decide to upgrade your bandwidth? When you hit 80% or do > you wait until you bump up against your limit? Well, it depends on your sampling rate ;-) We want to reserve enough bandwidth for bursting, like for march madness. A back of the hand guess is that our bandwidth needs compound roughly 30% per year. > If your connection is over 1 gig to your ISP, are you using a 10Gig > handoff or multiple one gig handoffs bundled together? We progressed from 1G to 2x1G then to 10G for commodity traffic. Our I2 traffic is on a separate link. Dale ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Message from briggsgb@plu.edu

Users in dorms: About 1300

Bandwidth reserved for residence halls:  We have no specific reservations for residence halls.

Caps per user: no

Shaping: We do have NetEqualizers, but they do nothing until we are congested.  

Deciding to upgrade:  When we can, hopefully before we need to, as we can afford, we upgrade.  We want to upgrade before we require the services of the NetEq.  That translates to before 80% if we can.

We have two connections to campus, but most devices on campus share one of them at 500Mbps.

Greg Briggs 


Thanks, the results both on and off list are interesting. So far is seems everyone has their residence halls and Academic/Staff/Office traffic mixed together. Our residence halls don't have any classrooms or offices in them so residence traffic is separated physically and logically with its own IP space. The traffic merges together on our 2 ISP fiber links but since the IP blocks are separate we know how much the bandwidth dorms specifically use. For us , 3000 students can use as much as 700Mbps. I'm expecting a 100Mbps-200Mbps increase for next year. Also , almost all the residence halls' traffic is Internet bound. The only traffic that stays on the local network is some email and www traffic to the campus website (less than 10Mbps) . On 2/25/2014 6:10 PM, Dale W. Carder wrote: > Thus spake Vlade Ristevski (vristevs@RAMAPO.EDU) on Tue, Feb 25, 2014 at 01:24:34PM -0500: >> Total number of users in dorms? > Close to 10k. > >> Total Internet bandwidth reserved for residence halls (to your ISP): > Each building connects in at 2x1G. But, it is not "reserved". It > connects no differently than any other typical campus building. > >> Do you have a cap (Mbps) per users? If so, at what speed? > > no > >> If you cap, do you set it at the switch port using QOS (wireless >> controller for wireless) or use an appliance such as a Packetshaper >> or Firewall? > We found that these appliances cost more to buy and maintain than the > bandwdith they "save" especially since we've been told that our dorm > network needs to perform better than the private sector. The cable co > here typically does ~20Mbit/sec as the base rate. > >> When do you decide to upgrade your bandwidth? When you hit 80% or do >> you wait until you bump up against your limit? > Well, it depends on your sampling rate ;-) We want to reserve enough > bandwidth for bursting, like for march madness. A back of the hand > guess is that our bandwidth needs compound roughly 30% per year. > >> If your connection is over 1 gig to your ISP, are you using a 10Gig >> handoff or multiple one gig handoffs bundled together? > We progressed from 1G to 2x1G then to 10G for commodity traffic. Our I2 > traffic is on a separate link. > > Dale > > ********** > Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. -- Vlad ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

Total number of users in dorms?
7,500

Total Internet bandwidth reserved for residence halls (to your ISP):

No bandwidth is reserved specifically for the residence halls.

Do you have a cap (Mbps) per users?  If so, at what speed?

More MB/week-- we utilize weekly bandwidth accounting.  Students purchase a tier of service of service, and are unlimited in speed unless they exceed their allocation, then are reduced to modem speeds until their weekly reset or they purchase a higher tier (no harm/no foul).  This is for all students resident/commuter.  Resident tiers are priced/packaged differently due to their greater consumption patterns (to avoid subsidies).

If you cap, do you set it at the switch port using QOS (wireless controller for wireless) or use an appliance such as a Packetshaper or Firewall?

When do you decide to upgrade your bandwidth? When you hit 80% or do you wait until you bump up against your limit?

If your connection is over 1 gig to your ISP, are you using a 10Gig handoff or multiple one gig handoffs bundled together?

We pay for a committed rate of ~5Gbps at the 95th percentile for the entire campus, however have two 10Gbps ports to our provider due to bursty traffic which will occasionally exceeds 10Gbps.  The residential service pays for its portion of use.  That is calculated across all wired and wireless consumption on campus by their users (not just in the residence halls).

When to worry is a bit more complicated given access rate versus committed rate -- and also sampling rates.  I drive the committed close to 100%.  Access, depends on the price, 30% if you can afford it.  But looking at short-term sample rates may indicate otherwise (1, 10, 30, 60 second samples).

-William



********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

Late to the party, but for what it's worth...

On 2/25/2014 1:24 PM, Vlade Ristevski wrote:

Total number of users in dorms?

Around 3000 users, but many more "devices".

Total Internet bandwidth reserved for residence halls (to your ISP):


As well as other responses, we do not "reserve" anything for resnet; all campus traffic regardless of source shares the same outside pipes.

Do you have a cap (Mbps) per users?  If so, at what speed?


No, other than the wired switchport (typically 100Mbps) or whatever they can get wireless (resnet was done recently, so 802.11n is available everywhere).

If you cap, do you set it at the switch port using QOS (wireless controller for wireless) or use an appliance such as a Packetshaper or Firewall?


We use a Procera.  Originally we got it for "serious shaping" when demand exceeded supply of bandwidth.  Currently we do not have that issue very often, but we still have it "prioritize" campus traffic over resnet traffic with differing traffic levels depending on time of day/day of week.  We still allow them equal competition for the available pipes, but lower resnet priority to insure campus traffic gets precedence during class hours. 

We also do a 24-hour "quota" for all users.  You can go at max rate you can get up to 8GB/day, then we start to apply rate limits (via Procera "Volume Based Shaping" rules) that progressively squeeze the bandwidth hogs.  Only a fraction of a percent of users ever hit this barrier, but the ones that do typically are "frequent flyers".

When do you decide to upgrade your bandwidth? When you hit 80% or do you wait until you bump up against your limit?


Whenever we can afford it :)  I wish we could automatically get funded for upgrades when we reach 80%, but that has never been the case.

If your connection is over 1 gig to your ISP, are you using a 10Gig handoff or multiple one gig handoffs bundled together?


We have 10G to I2/TransitRail, and 2 x 1G commodity on physically diverse fiber paths.

As a general rule of thumb, I’m going by Netflix bandwidth requirements and making sure any student can get an HD Stream while watching Netflix.  https://help.netflix.com/en/node/306 . We use an appliance to do our bandwidth policing at the edge for wired and wireless.


Without giving away the full details, we're "really close" to Netflix / Akamai / Google cache servers, which helps the "user experience" more than anything I suspect.  The closer you are to a cache node, the better (obviously).  We aren't quite enough traffic to warrant our own (I have inquired and been shot down), but that would be the ideal situation.

Jeff
********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

Thanks. We are of similar size so this is very helpful.

On 2/27/2014 10:24 PM, Jeff Kell wrote:
Late to the party, but for what it's worth...

On 2/25/2014 1:24 PM, Vlade Ristevski wrote:

Total number of users in dorms?

Around 3000 users, but many more "devices".

Total Internet bandwidth reserved for residence halls (to your ISP):


As well as other responses, we do not "reserve" anything for resnet; all campus traffic regardless of source shares the same outside pipes.

Do you have a cap (Mbps) per users?  If so, at what speed?


No, other than the wired switchport (typically 100Mbps) or whatever they can get wireless (resnet was done recently, so 802.11n is available everywhere).

If you cap, do you set it at the switch port using QOS (wireless controller for wireless) or use an appliance such as a Packetshaper or Firewall?


We use a Procera.  Originally we got it for "serious shaping" when demand exceeded supply of bandwidth.  Currently we do not have that issue very often, but we still have it "prioritize" campus traffic over resnet traffic with differing traffic levels depending on time of day/day of week.  We still allow them equal competition for the available pipes, but lower resnet priority to insure campus traffic gets precedence during class hours. 

We also do a 24-hour "quota" for all users.  You can go at max rate you can get up to 8GB/day, then we start to apply rate limits (via Procera "Volume Based Shaping" rules) that progressively squeeze the bandwidth hogs.  Only a fraction of a percent of users ever hit this barrier, but the ones that do typically are "frequent flyers".

When do you decide to upgrade your bandwidth? When you hit 80% or do you wait until you bump up against your limit?


Whenever we can afford it :)  I wish we could automatically get funded for upgrades when we reach 80%, but that has never been the case.

If your connection is over 1 gig to your ISP, are you using a 10Gig handoff or multiple one gig handoffs bundled together?


We have 10G to I2/TransitRail, and 2 x 1G commodity on physically diverse fiber paths.

As a general rule of thumb, I’m going by Netflix bandwidth requirements and making sure any student can get an HD Stream while watching Netflix.  https://help.netflix.com/en/node/306 . We use an appliance to do our bandwidth policing at the edge for wired and wireless.


Without giving away the full details, we're "really close" to Netflix / Akamai / Google cache servers, which helps the "user experience" more than anything I suspect.  The closer you are to a cache node, the better (obviously).  We aren't quite enough traffic to warrant our own (I have inquired and been shot down), but that would be the ideal situation.

Jeff
********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.


-- Vlade Ristevski Network Manager IT Services Ramapo College ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

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