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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Can a customer take IP's with them?
On Wed, 23 Jun 2004 18:40:06 -0700 David Schwartz <[email protected]> wrote: > > a TRO against nacs.net has no effect on the behavior of providers > > such as verio who won't honor the advertisement of the subnet > > in BGP. the customer would have to, one-by-one i think, go after > > everybody with the relatively common policy of ignoring such > > advertisements (isn't sprint one of these? that'd be a pretty big > > hunk of internet to be disconnected from. sprint having no > > contractual relationship with the idiot, er, customer in question, > > it'd be hard for the customer to get anywhere there.) > > > > in other words, by itself the requested TRO incompletely solves > > the problem, making it fairly pointless. > We don't know enough about the specifics to know if this argument works or > not. There are two obvious cases where it doesn't: > 1) The block in question is large enough (or located in legacy space) such > that most/all providers will listen to it anyway. maybe. many filtering policies against legacy space are pretty severe (e.g., filter at /16 for legacy B space.) you'd have to have a block of /20 or larger for modern allocations. > 2) The customer's new provider meets with their old provider directly and > the new block is inside a larger block the original provider will continue > to advertise. (This is a very common case if both providers are large.) > It's worth pointing out, however, that if case 2 applies and case 1 > doesn't, then the ISP will still be providing a level of actual packet > carrying service to the customer. bzzzzt. if the ISPs have sensible policy implementations at the border, nobody will be be providing free transit because of accidents of adjacency. richard -- Richard Welty [email protected] Averill Park Networking 518-573-7592 Java, PHP, PostgreSQL, Unix, Linux, IP Network Engineering, Security
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