On Friday, March 04, 2011 06:27:27 am Doug Hanks wrote: > We generally recommend 150ms to most customers. The > added benefit of going from 150ms to 50ms is generally > not enough to warrant the move.
We've been using 250ms with multipliers of 3 on short runs and 5 on longer ones. Has been stable, except for cases when CPU suddenly becomes busy, dropping BFD packets, e.g., when inserting a compact flash card into a (software-based) router. We have both Cisco and Juniper, ranging from software- to hardware-based platforms, with centralized and distributed forwarding designs. The numbers above help us harmonize things. We're now settling on fairly modern kit (Juniper MX, Juniper M120, Cisco ASR1000, Cisco ASR9000, Cisco CRS, e.t.c.), so it may well be time to review these values if we can find a common understanding across these boxes in how better they implement BFD. Cheers, Mark.
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