7 ms·

Who enforces the price? I can just advertise any address I want with BGP.

by netr0ute 5y ago

baq 5y ago
and be promptly kicked off the internet by your isp... or somebody elses.
- netr0ute 5y ago
  Unless you own routers that other ISPs almost depend on, then you can say "take it or leave it"
  - iso1631 5y ago
    So lets say Centurylink decide to start advertising blocks they don't own, people like Cogent and Tata drop their links, people with multiple ISPs drop their links (shifting traffic to other tier 1 ISPs), and those with centurylink only change their ISP because they can no longer get to facebook.
    - netr0ute 5y ago
      That would work if most people had multiple ISPs, but most don't actually. Thus, you have some bargaining power, especially if you have some network advantage or feature nobody else has.
      - midasuni 5y ago
        If your local ISP advertises the wrong prefixes they get cut off by transit and peers and their customers complain they can’t get to any sites.
        netr0ute 5y ago
        Then that ISP can take it or leave it if their customers are complaining.
        midasuni 5y ago
        The customers dont get internet access, they don’t pay, crappy ISP goes bust.
        netr0ute 5y ago
        I'm guessing that crappy ISP is the one that wants to disconnect from my network.
        baq 5y ago
        If you really believe what you’re saying, which I find hard to believe myself, I recommend you try doing what you’re saying and report back the results.
        midasuni 5y ago
        If you are leaking routes you shouldn’t then a decent ISP will disconnect your crappy network. It happens a lot, usually because of mistakes, it’s typically fixed quickly. Feel free to null route or redirect any IP you want in your network. Just don’t be surprised when other networks cut you off if you advertise those routes out of your network, and don’t be surprised when your customers are unhappy because you aren’t transporting the packet to the target IP as is your job.
welterde 5y ago
If the address space wasn't assigned to you via a RIR, it won't take long for someone to notice though and get your announcement by enough relevant large tier 1 & tier 2 ISPs that your announcement won't reach most of the Internet. At that point you can of course use the addresses locally, but you can't reach the rest of the internet. This type of squatting was somewhat easier in the past when less of the IPv4 space was actually in use and when less strict filtering (or RPKI) was in place. Still happens, but it's getting harder and harder.

Who enforces the price? I can just advertise any address I want with BGP.

baq 5y ago

and be promptly kicked off the internet by your isp... or somebody elses.

netr0ute 5y ago
Unless you own routers that other ISPs almost depend on, then you can say "take it or leave it"
- iso1631 5y ago
  So lets say Centurylink decide to start advertising blocks they don't own, people like Cogent and Tata drop their links, people with multiple ISPs drop their links (shifting traffic to other tier 1 ISPs), and those with centurylink only change their ISP because they can no longer get to facebook.
  - netr0ute 5y ago
    That would work if most people had multiple ISPs, but most don't actually. Thus, you have some bargaining power, especially if you have some network advantage or feature nobody else has.
    - midasuni 5y ago
      If your local ISP advertises the wrong prefixes they get cut off by transit and peers and their customers complain they can’t get to any sites.
      - netr0ute 5y ago
        Then that ISP can take it or leave it if their customers are complaining.
        midasuni 5y ago
        The customers dont get internet access, they don’t pay, crappy ISP goes bust.
        netr0ute 5y ago
        I'm guessing that crappy ISP is the one that wants to disconnect from my network.
        baq 5y ago
        If you really believe what you’re saying, which I find hard to believe myself, I recommend you try doing what you’re saying and report back the results.
        midasuni 5y ago
        If you are leaking routes you shouldn’t then a decent ISP will disconnect your crappy network. It happens a lot, usually because of mistakes, it’s typically fixed quickly. Feel free to null route or redirect any IP you want in your network. Just don’t be surprised when other networks cut you off if you advertise those routes out of your network, and don’t be surprised when your customers are unhappy because you aren’t transporting the packet to the target IP as is your job.

welterde 5y ago

If the address space wasn't assigned to you via a RIR, it won't take long for someone to notice though and get your announcement by enough relevant large tier 1 & tier 2 ISPs that your announcement won't reach most of the Internet. At that point you can of course use the addresses locally, but you can't reach the rest of the internet. This type of squatting was somewhat easier in the past when less of the IPv4 space was actually in use and when less strict filtering (or RPKI) was in place. Still happens, but it's getting harder and harder.