|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: .ORG problems this evening
On Thu, 18 Sep 2003, E.B. Dreger wrote: : TV> Anycasting only works as a redundancy scheme when you have a : TV> mesh of *partially* overlapping BGP advertisements, so that a : TV> client has a guarantee that at least one address in the mix : TV> is located elsewhere from the rest. : : Don't be silly. This is like claiming that multihoming only : works if you spread services over different netblocks. We're talking about application (DNS) redundancy here, not transport-level (6to4 anycast RFC comes to mind) redundancy. With this in mind: : Ergo, that's why one withdraws the routes when a pod dies. : Routes need to reflect what's up. BGP doesn't know when a DNS server dies. Therein lies the findamental problem of using anycast as an application redundancy scheme. -- -- Todd Vierling <[email protected]> <[email protected]>
|