As for my setup, so that you can use it as a datapoint as well:
Model Name: SB6121
Vendor Name: Motorola
Firmware Name: SB_KOMODO-126.96.36.199-SCM01-NOSH
Boot Version: PSPU-Boot(25CLK) 188.8.131.52m3
Hardware Version: 5.0
I connect to CMTS-MAC=00:01:5c:32:6e:44, which is also a Cadent unit. I've been trying for months to get a concise geographic location of where the head-end is, but I'm connecting out of Mountain View, CA.
Router model is an Asus RT-N16, presently running TomatoUSB
Toastman firmware tomato-K26USB-1.28.0500.5MIPSR2Toastman-RT-N-Ext.trx
with IPv6 disabled (and if you need me to enable + test it let me know -- I have done so in the past with 100% success, but with these firmware/router adjustments
needing to be applied to make things work).--
Making life hard for others since 1977.
I speak for myself and not my employer/affiliates of my employer.