nanog mailing list archives
Re: maximum ipv4 bgp prefix length of /24 ?
From: Joe Hamelin <nethead () gmail com>
Date: Thu, 28 Sep 2023 19:56:31 -0700
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 IPv4address. considering IPv4 world is now mostly NAT'ed, 32 IPv4s are sufficient for most of thesmall and medium sized organizations and also home office workers likeyoutubers, and professional gamers and webmasters!It is because BGP research and experiment networks can not get /24 dueto 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
Current thread:
- maximum ipv4 bgp prefix length of /24 ? VOLKAN SALİH (Sep 28)
- Re: maximum ipv4 bgp prefix length of /24 ? Jon Lewis (Sep 28)
- Re: maximum ipv4 bgp prefix length of /24 ? Joe Hamelin (Sep 28)
- Re: maximum ipv4 bgp prefix length of /24 ? Owen DeLong via NANOG (Sep 28)
- Re: maximum ipv4 bgp prefix length of /24 ? Joe Hamelin (Sep 28)
- Re: maximum ipv4 bgp prefix length of /24 ? Owen DeLong via NANOG (Sep 28)
- RE: maximum ipv4 bgp prefix length of /24 ? Vasilenko Eduard via NANOG (Sep 28)
- Re: maximum ipv4 bgp prefix length of /24 ? VOLKAN SALİH (Sep 29)
- RE: maximum ipv4 bgp prefix length of /24 ? Jason Baugher (Sep 29)
- Re: maximum ipv4 bgp prefix length of /24 ? VOLKAN SALİH (Sep 29)
- Re: maximum ipv4 bgp prefix length of /24 ? Tom Beecher (Sep 29)
- Re: maximum ipv4 bgp prefix length of /24 ? Seth Mattinen via NANOG (Sep 29)
- Re: maximum ipv4 bgp prefix length of /24 ? Collider (Sep 29)
- Re: maximum ipv4 bgp prefix length of /24 ? William Herrin (Sep 29)
- RE: maximum ipv4 bgp prefix length of /24 ? Vasilenko Eduard via NANOG (Sep 28)
- Re: maximum ipv4 bgp prefix length of /24 ? Jon Lewis (Sep 28)