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subnetting etc.

Howdy,

I am re-allocating our IPv4 subnets for resnet wired and campus wireless networks.

Wired utilization has dropped, wireless continues to increase.

Some wireless subnets got saturated last spring.

Decided to continue to support wired resnet for the foreseeable future.

Currently /24’s on wired resnet one IP per drop. /22’s & /24’s for wireless.

All production IP’s are internet routable. No NAT yet. Hoping to avoid NAT & PAT.

Bradford NAC uses rfc1918 for registration processes. These are ACL’d off.

I hoped to start with a 2:1 allocation but some wired subnets showed 50-75% utilization last spring, others less.

I am considering allocating one /22 for approx 1600 wired drops hoping against a plethora of new wired devices (tivo, x-box-720, etc.) showing up in the fall. About a 1.6:1 allocation.

This gets me another /22 to apply to wireless (until we get WiSM-2’s and go to /20 subnets ;-) Slowly deploying IPv6 but it appears all devices will need to be dual stack for a while.

Anyone trying IPv6 only, maybe with a 6to4 gw?

Has anyone an opinion / professional recommendation for estimated Fall 2012 wired resnet utilization on a resident campus?

Maybe a Crystal ball in good working order for sale or trade?

Ideal solutions most welcome.

Thank You,

John Garner

Just Another Network Guy

Stephen F. Austin State U.

Disclaimer: The views and opinions expressed in this message are my own and do not necessarily reflect the views and opinions of Stephen F. Austin State University, its Board of Regents, or the State of Texas.

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Comments

subnetting etc.

We have Wism2’s with 1140’s (N) in all the residence halls, in addition to 1-port-per-pillow wired connections.

 

From Jan-May last year, we graphed an average of about 10% wired port utilization in the residence halls.  I’m fairly convinced that the bulk of that were TV’s, DVD’s, DVR’s, etc.

 

I don’t think half the students even know what an Ethernet cable is for anymore.

 

Mark Mages

Fort Lewis College

 

Message from dwcarder@wisc.edu

Thus spake john (jgarner@SFASU.EDU) on Mon, Jul 30, 2012 at 11:01:47AM -0500: > Slowly deploying IPv6 but it appears all devices will > need to be dual stack for a while. > Anyone trying IPv6 only, maybe with a 6to4 gw? Just to be clear on terminology I think you are referring to nat64+dns64. We have done some work with v6-only deployments and found that any application that embeds a v4 literal will of course break. A primary offender is Skype. Our experience shows that one will have better results running dual stack v6 and v4+nat than running v6-only + nat64. Applications know how to work in the v4nat world, but not the nat64 world. Dale ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Message from dwcarder@wisc.edu

Thus spake Mages, Mark (Mages_M@FORTLEWIS.EDU) on Mon, Jul 30, 2012 at 10:14:08AM -0600: > From Jan-May last year, we graphed an average of about 10% wired port utilization in the residence halls. I'm fairly convinced that the bulk of that were TV's, DVD's, DVR's, etc. > > I don't think half the students even know what an Ethernet cable is for anymore. The latest laptops from Apple no longer have ethernet jacks. I figure the writing is on the wall... Dale ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
we currently have 35 /24's for wireless. wireless device counts have grown 40% year-to-year(the last 4 years). at that rate wireless will consume 1/4th of our /16 in 2 years. we considered changing resnet to campus areas instead of per building. (but that is only delaying the inevitable.) this summer we're changing wireless to be NAT/PAT. On 07/30/2012 11:01 AM, john wrote: > Howdy, > > I am re-allocating our IPv4 subnets for resnet wired and campus wireless > networks. > > Wired utilization has dropped, wireless continues to increase. > > Some wireless subnets got saturated last spring. > > Decided to continue to support wired resnet for the foreseeable future. > > Currently /24’s on wired resnet one IP per drop./22’s & /24’s for wireless. > > All production IP’sare internet routable.No NAT yet.Hoping to avoid NAT > & PAT. > > Bradford NAC uses rfc1918 for registration processes. These are ACL’d off. > > I hoped to start with a 2:1 allocation but somewiredsubnets showed > 50-75% utilization last spring, others less. > > I am considering allocatingone /22 for approx 1600 wired drops > hopingagainst aplethora ofnewwired devices(tivo, x-box-720, > etc.)showingup in the fall.Abouta1.6:1 allocation. > > This gets me another /22 to apply to wireless (until we get WiSM-2’s and > go to /20 subnets ;-) Slowly deploying IPv6 but it appears all devices > will need to be dual stack for a while. > > Anyone trying IPv6 only, maybe with a 6to4 gw? > > Has anyone an opinion / professional recommendation for estimatedFall > 2012wired resnet utilizationon a resident campus? > > Maybe a Crystal ball in good working order for sale or trade? > > Ideal solutions most welcome. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
subnetting etc.

Hello,

 

Currently we are moving Resent from public IP space (/22s) to RFC1918 on the wired side as well.  This was about 6,000 clients last September.  During the year as full WIFI coverage was deployed in a Res Hall wired useage would would drop by 90% to 95% in the Res Hall.

 

We are looking into testing a NAT64 / DNS64 test environment.  Currently the only reasonable Open Source I have come across is Ecdysis from Viagenie.  Are there other Open Source stateful NAT64 gateways that any of you have experience with?

 

-scott

UNH

 

 

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