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-1.0.6.8-SCM01-NOSH
Boot Version: PSPU-Boot(25CLK) 1.0.12.18m3
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).