I’m having trouble determining if my 3.1 cable modem supports the draft spec. Is there a way to tell based on serial number? Are there hardware limitations that would prevent older 3.1 modems from receiving a software update to enable support?
It is quite rare that a modem, or home router have support for draft specs. I'm sorry to disappoint you
Thanks. I’ll be on fiber instead of Comcast by the time ISPs are actually deploying this, so I was just curious about my current hardware.
Several D3.1 modems support it now but most will need to be updated. Many of the vendors have been testing at quarterly L4S interop events, so I would expect them all to have production grade s/w next year.