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

[Satish Patel]

Now problem is I got 71.xx.xx.0/24 subnet from my ISP and i am going
to cookie cut to extract 4 IP address for internal Point to Point link
and my whole subnetting getting screwed up :(   my plan for i will cut
/24 in two piece 0-127 & 128-254 but now i need to use public space on
WAN so i need to 4 IP address from that :(

This is mess.. :(  i wish i can use private IP in point to point link :)

On Fri, Jun 24, 2016 at 2:00 PM, Nick Cutting <ncutting at edgetg.com> wrote:
> Good move
>
>
>
> Only the two devices need to support it
>
>
>
> ASA will not, Cisco IOS/XR/XE will
>
>
>
> But hey I’m probably one of the only humans running BGP on an ASA ))
>
>
>
> From: Satish Patel [mailto:satish.txt at gmail.com]
> Sent: Friday, June 24, 2016 1:49 PM
> To: Brian Turnbow
> Cc: Nick Cutting; Cisco Network Service Providers
>
>
> Subject: Re: [c-nsp] Private IP in point to point link on internet
>
>
>
> not going into hassle so i decided to use /31 subnet with public IP
> address. can i assigned following IPs
>
> 71.xx.xx.xx.254/31 <------p2p-------> 71.xx.xx.xx.255/31
>
> Its working but question is there won't be any issue right? just
> asking to make sure it's safe
>
> On Fri, Jun 24, 2016 at 3:35 AM, Brian Turnbow <b.turnbow at twt.it> wrote:
>> 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?
>>> >> _______________________________________________
>>> >> cisco-nsp mailing list cisco-nsp at puck.nether.net
>>> >> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>> >> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>> _______________________________________________
>>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>