[c-nsp] Private IP in point to point link on internet

[Brian Turnbow]

Yes it was allocated for cgn use inside a service provider network.
You cannot route it towards the internet, but it may be used inside the 
network
At least your customers will think its a public IP when they run traceroutes 
outbound

Brian



> -----Original Message-----
> From: Nick Cutting [mailto:ncutting at edgetg.com]
> Sent: mercoledì 22 giugno 2016 22:33
> To: Satish Patel; Brian Turnbow; Cisco Network Service Providers
> Subject: RE: [c-nsp] Private IP in point to point link on internet
>
> That space also "should" be non-routable over the internet - I know a few
> sneaky enterprises using it,  - wasn’t that carved out for CGN?
>
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
> Satish Patel
> Sent: Wednesday, June 22, 2016 4:19 PM
> To: Brian Turnbow; Cisco Network Service Providers
> Subject: Re: [c-nsp] Private IP in point to point link on internet
>
> This is new too me! never heard before. do we can use 100.64.0.0/16 on
> Point to point WAN link??
>
> On Wed, Jun 22, 2016 at 8:50 AM, Brian Turnbow <b.turnbow at twt.it>
> wrote:
> > Hi Satich,
> >
> > In your position I would  consider using shared address space instead
> > of private address space.
> > https://tools.ietf.org/html/rfc6598
> >
> > Best Regards
> >
> > Brian
> >
> >
> >> -----Original Message-----
> >> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf
> >> Of Satish Patel
> >> Sent: martedě 21 giugno 2016 04:53
> >> To: Cisco Network Service Providers
> >> Subject: [c-nsp] Private IP in point to point link on internet
> >>
> >> This is weird question but i thought let me get opinion from you guys.
> >> We have following scenario
> >>
> >> [ISP]------<Public-IP>-----[Router]-------<Private-IP>-------[L3
> >> Switch]------------[Hosts]
> >>
> >>
> >> In above diagram we get /24 subnet from ISP for hosts, Now i want to
> >> configure routed network between [Router] and [L3 switch] so can i
> >> use Private IP address (rfc1981)  like 192.168.100.1/30 instead of
> >> Public IP address, to save public IP address in point to point link.
> >> what would be
> > the
> >> disadvantage i will get doing that?
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