How to manage Static IPs to customers

edwin.mallette at edwin.mallette at
Fri May 8 14:32:33 UTC 2020

So in most cases I'm aware of, the cable provider did not use RIP directly
to a customer-managed device.  The cable operator would deploy their own
managed device, implement RIP and the appropriate keychains between the
operator-managed premise device and the CMTS.  As for the use cases, RIP was
implemented to address the specific 'recombine' use case where one day (or
evening) cable customer attachments could be moved from one CMTS to another.
Instrumenting that with DHCP or TR69 usually required other teams'
involvement and didn't allow portability.

With IPv6 you get PD which helps immensely.


-----Original Message-----
From: NANOG <nanog-bounces at> On Behalf Of Javier Gutierrez Guerra
Sent: Friday, May 8, 2020 8:57 AM
To: NANOG list <nanog at>
Subject: RE: How to manage Static IPs to customers

That's surprising to me, I have no intentions to do routing with our cable
subscribers, that seems like a headache for both sides Today we have
specific ranges within subnets from where we assign IPs to customers, my
main problem that I'm trying to get around is having to change a customer
static IP if their node gets splitter and I have to mode them to a different


Javier Gutierrez Guerra

-----Original Message-----
From: NANOG <nanog-bounces at> On Behalf Of Bryan Fields
Sent: Thursday, May 7, 2020 5:57 PM
To: nanog at
Subject: Re: How to manage Static IPs to customers

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On 5/7/20 5:54 PM, Brandon Jackson via NANOG wrote:
> I have seen (Charter) and heard quite a few run RIP or some other 
> routing protocol on the CPE.

Yep, it's RIP.  They don't support IPv6 on this either.  I've been asking
IPv6 since 2006, it's always next year.

Bryan Fields

727-409-1194 - Voice

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