How to manage Static IPs to customers

Luke Guillory lguillory at
Fri May 8 20:15:59 UTC 2020

I believe some of the bigger guys do BSoD (business services over DOCSI), L2 out the CMTS then take it to a central router for the CPEs gateway. Being that the GW lives on the CMTS in a normal setup, during node splits that would require customers moving to a new CMTS it might mean the customer doesn’t have access to that subnet anymore. 

BSoD makes that a non-issue since their GW doesn't reside on the CMTS anymore, just move their vlan and they're good. 


-----Original Message-----
From: NANOG <nanog-bounces at> On Behalf Of Brandon Martin
Sent: Friday, May 8, 2020 2:55 PM
To: nanog at
Subject: Re: How to manage Static IPs to customers

*External Email: Use Caution*

I'm curious...

Is it part of the DOCSIS spec that the CMTS terminates L3, or can they bridge to IEEE 802(.3) and delegate that to some other piece of gear?
I'm unfortunately not familiar with the MSO world much at all aside from a little bit of L1.

Brandon Martin

More information about the NANOG mailing list