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Traffic shaping options: Difference between revisions
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Whilst there is no shaping on uplink (other than what you may impose on your end with your own equipment), downlink does his shaping at the BRAS (Broadband Remote Access Server) within BT. This limits downlink traffic based on line speed. On 20CN circuits BT actually limit to some defined values (usually nearest Mb/s) and set the value below your line speed. On 21CN the rate is set based on the sync speed of your line each time you connect.
==Matching BRAS rate our end:==
We match the BRAS rate our end, limiting your line in the same way. This is in line with us not being the bottleneck as we set the rate the same as the BRAS. For 20CN, we even have a system to seamlessly change this rate without dropping your connection as soon as BT advise us of a BRAS rate change which can be hours after the line changes to a new sync speed. On 21CN the rate updates every time you connect.
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