On 1/6/20 1:47 PM, William Herrin wrote:
If you're not multihomed, buy a $20 virtual server from Vultr or a comparable cloud service, read about the BGP service they provide (BGP via two providers is what will make you multihomed), set up a VPN from there back to your site and then see multihomed above.
"Distinct routing policy", while a bit less clear-cut than being multi-homed, is another valid reason to get an ASN and more flexible if you're in a situation where you might be concerned about "strictness". It's mostly applicable to ISPs rather than end-users, I would suppose. However, it generally suffices to say "I am a network operator and set my own routing policies, have my own PI space under those grounds, and my single upstream provider prefers that I have a public ASN if I want to run BGP with them which I wish to do as part of setting my network's routing policies." As has been pointed out, there's not a shortage of ASNs like there is IPv4. The policy surrounding assignment of ASNs is mostly to make sure that people who are getting one actually have a use for it and know what they intend to do with it. -- Brandon Martin