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Comcast Dumps Congestion Management System It Says Was Unused for a Year

Image courtesy: cobalt123Comcast has quietly dropped its internet congestion management system, designed to slow down its heaviest users, claiming it has gone unused for more than a year and was no longer needed.

Originally spotted by readers of DSL Reports, the announcement referenced the system that replaced Comcast’s speed throttle that intentionally degraded peer-to-peer network traffic after Comcast claimed it was unfairly impacting its other customers:

As reflected in a June 11, 2018 update to our XFINITY Internet Broadband Disclosures, the congestion management system that was initially deployed in 2008 has been deactivated. As our network technologies and usage of the network continue to evolve, we reserve the right to implement a new congestion management system if necessary in the performance of reasonable network management and in order to maintain a good broadband Internet access service experience for our customers, and will provide updates here as well as other locations if a new system is implemented.

Comcast’s “protocol-agnostic” network management technology, designed by Sandvine and introduced in 2008, measured customer traffic and singled out heavy users for speed reductions when Comcast’s network was saturated with traffic. Customers were unaware if they were deemed heavy users or if their traffic was targeted for temporary speed reductions. Comcast relied on the technology, along with the introduction of a 250 GB nationwide data cap, to control network traffic and stall the need for expensive node-split upgrades.

Comcast claims the introduction of DOCSIS 3.0 (starting in late 2008) and DOCSIS 3.1 (2017) gradually eliminated the need to maintain the congestion management system, because channel bonding vastly expanded available internet bandwidth. What remains in place in most Comcast service areas is Comcast’s controversial 1 TB usage cap. The company initially claimed its data caps were part of a network traffic management strategy, but more recently the company claims it collects more from heavy users to compensate for its broadband investments.







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