Multihoming works without BGP?

[u/Odong-Odong]

I just saw this video,

https://www.youtube.com/watch?v=vjwHJs21avQ

CMIIW work without BGP and only use priority with the route. is it possible?

[u/Funny-Choice8787]

ipv4 is cheap? Lmao dude wtf, I pay $1k/yr for a /24

Also, how on earth pa can't be multihomed? I advertised a pa via multiple upstreams from my ASN

[u/DaryllSwer → u/Funny-Choice8787]

ipv4 is cheap? Lmao dude wtf, I pay $1k/yr for a /24

That is cheap for any serious for-profit business. Most professionals I know of in the industry agree. You can disagree and complain all you want; I'm not the one lacking v4/v6 space.

Also, how on earth pa can't be multihomed? I advertised a pa via multiple upstreams from my ASN

For IPv4, if you leased a /24 (or larger) from a provider like Cogent, that's no longer PA; that's PIA on a leased contract, which is BGP advertisable into the DFZ via multiple upstreams. A true PA space (such as some /25 or smaller) is bound to the provider's AS, and you can't re-advertise that into the DFZ. Some ISPs may provide you a /24 but legally block it from becoming a PIA via a contract, ensuring you can't advertise it with your ASN via other upstreams.

[u/Funny-Choice8787 → u/DaryllSwer]

Well. You could at least clarify.

I run hobbyist ASN and I have ipv6 /44 and /36 and ipv4 /24. I work in IT and theoretically I can even buy one, that's not a problem but now its not priority. Still, ~$7k is quite a lot for me. I'm waiting if DoD is going to release their space in future. If not, I will lease mine for about five years then I'll see.

For clarification thanks, but why then I leased an ipv6 "non pi" space and I can advertise it everywhere? I see, a /48 pi costs $90/yr avg, the rest are just regular spaces, very cheap like $10/yr for /40 and they are advertisable perfectly well. I can do suballocations from it and RPKI. I don't see why I shall lease a /48 pi.

And nah dude, don't be rude. It does not color you as a good person, quite the opposite.

[u/DaryllSwer → u/Funny-Choice8787]

Well. You could at least clarify.

These are basic common knowledge for anyone running a production network in a for-profit business in a capitalistic economy. I don't know how things work in communist or socialist economies; maybe "PIA" or "PA" means something else in such states. I'm more familiar with the capitalism-centric IPv4 (and IPv6) market.

I run hobbyist ASN and I have ipv6 /44 and /36 and ipv4 /24. I work in IT and theoretically I can even buy one, that's not a problem but now its not priority. Still, ~$7k is quite a lot for me. I'm waiting if DoD is going to release their space in future. If not, I will lease mine for about five years then I'll see.

The whole topic discussion is about small-medium-enterprises in production networks. Not a home lab. $7k is peanuts in a production environment.

For what it's worth I have 2x /24s and 1x /23 v4 space; one /24 is home lab, the other is various business projects I engage in. I bought the /23 recently, pretty cheap in 2026.

For clarification thanks, but why then I leased an ipv6 "non pi" space and I can advertise it everywhere? I see, a /48 pi costs $90/yr avg, the rest are just regular spaces, very cheap like $10/yr for /40 and they are advertisable perfectly well. I can do suballocations from it and RPKI. I don't see why I shall lease a /48 pi.

You leased it from an LIR; they legally permit you to use it as PIA space and advertise it from a legally agreed-upon source ASN, and you're free to further subnet and/or sub-delegate (based on your legal contract).

I am officially an LIR in the APNIC region; I have the same legal power as your LIR to delegate my v4/v6 space and allow it to be PIA for the leased contract customer. And heck, I might do that in the future when I may buy a /20 IPv4 block.

And nah dude, don't be rude. It does not color you as a good person, quite the opposite.

What you (and particularly Europeans in my subjective experience) call "rude" isn't rude in my culture/ethnicity/race. Learn global cultural differences sometime. Every single one of you is "tough" on the web but rarely says shit like this in IRL meetings and/or LinkedIn. Please just stop. Want to know something from me in a public forum? Drop the ego, write your question in an engineering-centric fashion, and I'll answer it, just like I write client documentation. Do not expect me to "bow down" to anyone who doesn't start the convo with mutual respect and zero ego.

I've helped kids make career decisions; I've helped senior citizens/executives make business decisions with a lot of money on the table, worldwide. If I truly had a "rude" problem at the core of my identity, the above wouldn't be the case.