- Unlike many other service providers, IPv4 packets from the Comcast network are configured with [https://en.wikipedia.org/wiki/Differentiated_services DSCP] 8, Priority higher than Default/Routine (0). + There is an edge case interaction between Comcast IPv4 [https://en.wikipedia.org/wiki/Differentiated_services DSCP] and improper condition handling in the [https://en.wikipedia.org/wiki/Wireless_Multimedia_Extensions WMM] driver in certain '''Linksys/Cisco eSeries''' routers (and possibly others as well) which results in very low download speeds. This issue can appear in both stock and third-party (DD-WRT) firmware, although Cisco appears to have at some point released new WMM drivers that largely resolve the issue in current stock firmware.
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