How to manage Static IPs to customers

K MEKKAOUI amekkaoui at
Fri May 8 17:17:10 UTC 2020

I am also interested in this. We are using DOCSIS and I am not sure what other providers with DOCSIS are using, any help on this will be appreciated.

Thank you


From: NANOG [mailto:nanog-bounces at] On Behalf Of Michael Crapse
Sent: May 8, 2020 11:54 AM
To: edwin.mallette at
Cc: NANOG list
Subject: Re: How to manage Static IPs to customers


On our network(which isn't docsis, granted) we use PPPoE for all static IP addresses, because it allows /32 ip address allocations for all home CPE routers, upstream, the routers handle routing via ospf to change the path of where that /32 public IP goes. It allows "zero touch" moving of a customer from one PoP to another. 


On Fri, May 8, 2020 at 8:34 AM <edwin.mallette at> wrote:

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

CAUTION: This email is from an external source. Do not click links or open
attachments unless you recognize the sender and know the content is safe.

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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the NANOG mailing list