Re: maximum ipv4 bgp prefix length of /24 ?

[Joe Hamelin <nethead () gmail com>]

Wasn't it about 1997 or so when we ran into deployed Cisco gear (5500s back
then) running out of memory for BGP routes?  Been there, done that. -Joe

On Thu, Sep 28, 2023 at 7:41 PM Jon Lewis <jlewis () lewis org> wrote:

> On Fri, 29 Sep 2023, VOLKAN SALİH wrote:
>
> > 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?
>
> Not going to happen any time soon (if at all).
>
> #show ip route summary | i Source|---|bgp
>     Route Source                                Number Of Routes
> ------------------------------------- -------------------------
>     bgp                                                   925809
>
> Think about how much network gear is out there that is straining under the
> current size of the global table.  Opening the flood gates to many more
> prefixes with /25-/27 routes in the global table would mean lots of gear
> needs to be upgraded/replaced sooner rather than later.
>
> ----------------------------------------------------------------------
>   Jon Lewis, MCP :)           |  I route
>   StackPath, Sr. Neteng       |  therefore you are
> _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________


-- 
--
Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474