maximum ipv4 bgp prefix length of /24 ?

Fri Sep 29 07:34:56 UTC 2023

On 9/28/23 23:25, VOLKAN SALİH wrote:

> hello,
>
> I believe, ISPs should also allow ipv4 prefixes with length between 
> /25-/27 instead of limiting maximum length to /24..
>
> I also believe that RIRs and LIRs should allocate /27s which has 32 
> IPv4 address. considering IPv4 world is now mostly NAT'ed, 32 IPv4s 
> are sufficient for most of the small and medium sized organizations 
> and also home office workers like youtubers, and professional gamers 
> and webmasters!
>
> It is because BGP research and experiment networks can not get /24 due 
> to high IPv4 prices, but they have to get an IPv4 prefix to learn BGP 
> in IPv4 world.
>
> What do you think about this?
>
> What could be done here?
>
> Is it unacceptable; considering most big networks that do 
> full-table-routing also use multi-core routers with lots of RAM? those 
> would probably handle /27s and while small networks mostly use default 
> routing, it should be reasonable to allow /25-/27?
>

RAM is not the issue... it's FIB.

If you pay me for FIB slots, I'm happy to install /32's to your heart's 
content :-).

Mark.