How to manage Static IPs to customers

K. Scott Helms kscott.helms at
Fri May 8 13:11:10 UTC 2020


There's really no good way to handle this without routing or tunneling that
I've been able to find in a very long time.  (SD-WAN can help, but it's
just a fancy way to tunnel in this regard.)  It's pretty amazing that this
is such an issue, but it remains so.  I have tried to work around this
using BSoD (
but we eventually abandoned the effort because it rapidly became to
expensive to scale to solve a niche problem.

Scott Helms

On Fri, May 8, 2020 at 8:58 AM Javier Gutierrez Guerra <
GuerraJ at> wrote:

> 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 CMTS
> Thanks,
> 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
> for
> IPv6 since 2006, it's always next year.
> --
> Bryan Fields
> 727-409-1194 - Voice
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