North American Network Operators Group|
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Re: Disaster recovery using as-prepend?
On Thu, 16 Feb 2006, Warren Kumari wrote: > If your primary is connected to ISP_A and the backup is connected to ISP_B, > customers connected to ISP_B MAY still flow to your backup DC (ISP_B will > probably set local preference on all customer routes - you should be able to > override this behavior with communities but not all providers support this (or > honor it 100% of the time!)) And in addition to that, even multihomed customers of ISP_B may choose the prepended route for a number of different reasons; for instance, ISP_B might be a cheaper pipe for them, or there may be a smart-ish routing device or scheme in play that overrides normal BGP decision making. -- -- Todd Vierling <[email protected]> <[email protected]> <[email protected]>