I am trying to perform some capacity planning for some of our residential pops, but the old calcs I used to use seem useless -- as they were adapted from the dialup days and relied upon a percentage of users online (~50%) and a percentage of concurrent transmission (~19%). My present scenario involves a micro-pop terminating 250 residences where users are expecting 4 mb/s. So I am looking for some baseline to begin at, so I am wondering what others are doing. Any thoughts are appreciated. Thanks --steve
We have calculated our customers peak b/w usage between 20 and 60 kbps/user, spread across a wide variety of users and wide range of speeds (128/128 up to 15000/1000 kbps). You only need a few heavy users to skew things. But 400 at 4 Mbps would make me think that 20 to 30 Mbps would be sufficient. Frank -----Original Message----- From: sjk [mailto:sjk@sleepycatz.com] Sent: Tuesday, August 11, 2009 7:11 PM To: nanog@nanog.org Subject: Residential BW Planning I am trying to perform some capacity planning for some of our residential pops, but the old calcs I used to use seem useless -- as they were adapted from the dialup days and relied upon a percentage of users online (~50%) and a percentage of concurrent transmission (~19%). My present scenario involves a micro-pop terminating 250 residences where users are expecting 4 mb/s. So I am looking for some baseline to begin at, so I am wondering what others are doing. Any thoughts are appreciated. Thanks --steve
I had a very educational experience with an ISP that provides two choices to their customers: a) pay as you go (per GB charge with a token monthly fee for keeping the port active) and b) 150GB per month "unlimited" package Both packages were priced with the intent to have the same cost for customers with similar usage. After 1 year and about 2000 customers in each package, we found that the average consumption was 0.2 Mbps per customer in a) and 0.35 Mbps per customer in b) Hope that helps. Hector
Hector Herrera wrote:
After 1 year and about 2000 customers in each package, we found that the average consumption was 0.2 Mbps per customer in a) and 0.35 Mbps per customer in b)
Although it's wise to plan for peak average, and depending on your service levels, keep enough cover room (though redundancy may provide that cover room for you) for the massive events. Jack
Hector Herrera wrote:
After 1 year and about 2000 customers in each package, we found that the average consumption was 0.2 Mbps per customer in a) and 0.35 Mbps per customer in b)
4000 residential customers at an average of 1.1Gbps? Wonder what the 95th looked like. Seems a bit high.
Hope that helps.
Hector
This may have changed a bit - but we used to use 2000 high speed = 100 meg of capacity. Based on 5000/800 ADSL or 8000/1000 cable modem profiles mainly... Paul -----Original Message----- From: Frank Bulk [mailto:frnkblk@iname.com] Sent: Tuesday, August 11, 2009 11:06 PM To: 'sjk'; nanog@nanog.org Subject: RE: Residential BW Planning We have calculated our customers peak b/w usage between 20 and 60 kbps/user, spread across a wide variety of users and wide range of speeds (128/128 up to 15000/1000 kbps). You only need a few heavy users to skew things. But 400 at 4 Mbps would make me think that 20 to 30 Mbps would be sufficient. Frank -----Original Message----- From: sjk [mailto:sjk@sleepycatz.com] Sent: Tuesday, August 11, 2009 7:11 PM To: nanog@nanog.org Subject: Residential BW Planning I am trying to perform some capacity planning for some of our residential pops, but the old calcs I used to use seem useless -- as they were adapted from the dialup days and relied upon a percentage of users online (~50%) and a percentage of concurrent transmission (~19%). My present scenario involves a micro-pop terminating 250 residences where users are expecting 4 mb/s. So I am looking for some baseline to begin at, so I am wondering what others are doing. Any thoughts are appreciated. Thanks --steve ---------------------------------------------------------------------------- "The information transmitted is intended only for the person or entity to which it is addressed and contains confidential and/or privileged material. If you received this in error, please contact the sender immediately and then destroy this transmission, including all attachments, without copying, distributing or disclosing same. Thank you."
On Tue, 11 Aug 2009, sjk wrote:
I am trying to perform some capacity planning for some of our residential pops, but the old calcs I used to use seem useless -- as they were adapted from the dialup days and relied upon a percentage of users online (~50%) and a percentage of concurrent transmission (~19%). My present scenario involves a micro-pop terminating 250 residences where users are expecting 4 mb/s. So I am looking for some baseline to begin at, so I am wondering what others are doing.
Any thoughts are appreciated.
I've seen everything from ~20 kilobit/s/user at peak, to over 400 (measured at 5 minute average with mrtg with ~500 users). It differs a lot if you get the "mom and pop"-userbase or if you have bunch of students who are downloading/streaming stuff all the time. Generally, comparing ADSL 8/1 to ETTH 10/10 or 100/100, download doesn't differ much, but symmetric speed users put out factor 4 more traffic (8/1 users upload half as much as what they download, ETTH users upload double what they download). -- Mikael Abrahamsson email: swmike@swm.pp.se
participants (7)
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Frank Bulk -
Hector Herrera -
Jack Bates -
Joe Maimon -
Mikael Abrahamsson -
Paul Stewart -
sjk