nanog mailing list archives
Re: IPv4 smaller than /24 leasing?
From: "Bob Evans" <bob () FiberInternetCenter com>
Date: Tue, 13 Mar 2018 07:37:31 -0700
That site you quoted looks like text that I created. For CloudIPv4.com (part of RentIPv4.com). To peer most networks require assigned IPv4 space. Most networks do not want to burn a /24 to peer. The local peering routers will propagate a /25... /30.. etc. from the peering platform to the rest of the their own network's routers but usually never beyond - keeps it internal within the network's own BGP sessions. However, you can not expect the /25.. /30 to be propagated beyond the network you have a BGP session with - I.E. transits will filter the subnets /25.../30. I have seen an exception locally or regionally it was agreed too propagate outside the network. Thank You Bob Evans CTO
Le 2018-01-04 20:16, Job Snijders a écrit :On Thu, 4 Jan 2018 at 20:13, Filip Hruska <fhr () fhrnet eu> wrote:I have stumbled upon this site [1] which seems to offer /27 IPv4 leasing. They also claim "All of our IPv4 address space can be used on any network in any location." I thought that the smallest prefix size one could get routed globally is /24?Yes So how does this work?Probably with GRE, IPIP or OpenVPN tunnels. Kind regards, JobIPv4 /24 is commonly the minimal chunk advertised to (and accepted by) neighbors. If I run a global (or regional) network, I may advertise this /24 -- or rather an aggregate covering it -- over my diverse interconnection with neighbors, your /27 being part of the chunk and routed to you internally (if you're va customer)-- no need for encapsulation efforts. Similar scenario may be multi-upstream, subject to acceptance of "punching holes in aggregates"... Am I missing something? What's the trigger for doing tunneling here? Happy New Year '18, by the way ! mh
Current thread:
- Re: IPv4 smaller than /24 leasing? Bob Evans (Mar 13)
- RE: IPv4 smaller than /24 leasing? Naslund, Steve (Mar 13)
- RE: IPv4 smaller than /24 leasing? Bob Evans (Mar 13)
- Re: IPv4 smaller than /24 leasing? Justin Wilson (Mar 13)
- Re: IPv4 smaller than /24 leasing? William Herrin (Mar 13)
- Re: IPv4 smaller than /24 leasing? Justin Wilson (Mar 13)
- Re: IPv4 smaller than /24 leasing? Bob Evans (Mar 13)
- Re: IPv4 smaller than /24 leasing? Justin Wilson (Mar 13)
- Re: IPv4 smaller than /24 leasing? Martin List-Petersen (Mar 13)
- Re: IPv4 smaller than /24 leasing? Mike Hammett (Mar 18)
- Re: IPv4 smaller than /24 leasing? William Herrin (Mar 13)
- RE: IPv4 smaller than /24 leasing? Naslund, Steve (Mar 13)