After upgrading my service too 600 Mbps download package I have notice extremely low upload speeds (generally <0.5 Mbps). This issue did not appear prior to this change and, in fact, did not start until after tech came by to "drop off equipment" (he did not drop off any equipment since I had already purchased and installed my own Motorola MB7621 which worked without issue). Download speeds have not been at the stated 600 Mbps at any point (typically ~200 - 250 Mbps). Checking my modem, I am seeing repeated instances of the following errors...
|| B-INIT-RNG Failure - Retries exceeded;CM-MAC=00:40:36:65:9e:bd;CMTS-MAC=00:01:5c:96:a2:62;CM-QOS=1.0;CM-VER=3.0;
|| No Ranging Response received - T3 time-out;CM-MAC=00:40:36:65:9e:bd;CMTS-MAC=00:01:5c:96:a2:62;CM-QOS=1.0;CM-VER=3.0;