Using RFC1918 on Global table as Loopbacks

Thu Oct 5 19:33:21 UTC 2023

I carry public Internet routing in a vrf, and my loopback and internal IGP interfaces are in the master/default vrf

Aaron

> On Oct 5, 2023, at 12:24 PM, Javier Gutierrez <GutierrezJ at westmancom.com> wrote:
> 
> 
> Hi, 
> I have recently encountered some operational differences at my new organization that are not what I have been exposed to before, where the loopback of the core network devices is being set from RFC1918 while on the global routing table. I'm sure this is not a major issue but I have mostly seen that ISPs use global IPs for loopbacks on devices that would and hold global routing.
> My question is, what is the most used or recommended way to do this, if I continue to use RFC1918 I will save some very much desired public address space, but would this come back to bite me in the future?
> 
> 
> Kind regards,
> 
>  
> 
> Javier Gutierrez,
> 
>  
> 
>  
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