Yes, this is correct. However, the thing I am interested in, is HOW is this actually done ? I.e, is the reading taken via SNMP off the router / switch ? Is this even possible. I dont know what can and cant be done with the high end routers / switch. Also, would the providor set the router / switch to allow up to 2MB/s ? or if not, what is restricting me to up to 2MB/s ?
There are network appliances available that allow for bandwidth "shaping" per user, protocol, port, application, etc, including support for rate caps and bursting. They should also allow for some sort of exporting of bandwidth reports to allow for custom billing.
For example: http://www.packeteer.com/prod-sol/products/packetshaper.cfm
I'm sure there are many others...
Cameron, Danny, Thanks to both of you for the information. I now know what I wanted to know. Thanks for the info. Whitey
Sorry for the off topic post, but I cant think of anywhere else to ask about this. I have googled and failed to find any valid answers. AFAIK, most routing techniques can be found on cisco's site. however, the 95
-------- Original post off SLE archive percentile is a provider technique (inaccurate) to figure out how much BW they actually require to satisfy customers (for given QoS).
I understand the principle of 95th percentile for bandwidth charging, but I dont get how it is monitored. afaik most time is done using 5min mean values over a long period of time and gets the 95 percentile of those values.
Our bandwidth is provided through a Summit48 switch / router. We get given 1MB/s bursting to 2MB/s. It looks like your traffic is shaped (see cisco command "shape average CIR Bc Be") at 1Mbps CIR. (or policed, if the stuff happens on the ISP's router).
Is this achieved by configuring our port on the switch/router to have a max speed of 2MB/s ? then querying the switch/router every 5 minutes for the current throughput ? IMHO one doesn't have anything to do with the other. 95 percentile is used by ISPs to figure out what their "big fat pipe" size should be. Shaping is for the rest of us, "mortals" to allow some sort of sharing and limit the TCP window size.
I am just interested really - I dont have any experience with high end switches like the Summit. - Is it even possible to set a max bandiwdth on the switch's ports ? imo, you can theoretically send traffic at link rate, but if the other side limits the BW (policers, queue size etc) is no use :(.
If I am off the mark here, can anyone point me at any info explaining how it is implemented. cisco has good docs re shaping algorithms (which is a simple (?) token bucket) and policing too. all others have similar algorithms (maybe a little tweaked to serve certain purposes).
Hope this helps, Laur
participants (2)
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Laur Ivan -
Neil White