On 10/Apr/15 22:37, Rod Beck wrote: > Hold on, Nick. > > 1. Choose whatever route protection method you want. MPLS fast reroute (not > really that fast but probably adequate for lots of IP traffic), traditional > SDH 50 millisecond failover, optical protection schemes, etc.
Actually, MPLS-FRR can be 50ms, although you can get run BFD or proprietary protection schemes on IPoDWDM line cards as low as 15ms. For me, the whole 50ms protection failover is a farce if the end-to-end circuit is greater than 50ms (typical of some long submarine cable systems). A local repair at 50ms is not "hitless" when the end-to-end service is 180ms, for example. > > 2. For small players and smaller circuits route protection is much more > convenient, and yes, there is a cost to managing lots of circuits. Convenient, yes, but not always commercially sensible. While protection from a carrier may not be double the cost of linear, it can be cheaper to get multiple linear circuits. Mark.
