North American Network Operators Group

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Re: Failover solution using BGP

  • From: Roland Dobbins
  • Date: Wed Dec 31 13:48:59 2008

On Dec 31, 2008, at 11:36 PM, Florian Weimer wrote:

DNS tweaks won't help with that (and to be honest, BGP doesn't address it, either).

After all, there ought to be an internal line of communication as well as the external one, and the availability probes can be set up with logic such that if one side has bidirectional comms and the other doesn't, the desired behavior (whatever that may be, dependent upon which side has full comms) can be enforced.

Couple that with a stateless front-end - which could also afford active/active in that tier, even if the back-end is monolithic - and it's more nearly a complete solution, with more options, granularity, and safeguards available, than one based upon routing alone.

Roland Dobbins <[email protected]> // +852.9133.2844 mobile

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