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Exam 642-885 Question id=3376 High Availability Routing Features

When configuring BFD, the multiplier configuration option is used to determine which value?

A. The retry interval
B. The number of BFD packets that can be lost before the BFD peer is declared "down"
C. The minimum interval between packets accepted from the BFD peers
D. The number of BFD echo packets that will be originated by the router
E. The number of routing protocols that will use BFD for fast peer failure detection

bfd multiplier
To set the bidirectional forwarding detection(BHD) multiplier, use the bfd multiplier command in the appropriate configuration mode. To return the router to the default setting, use the no form of this command.

bfd multiplier multiplier
no bfd multiplier

Syntax Description
multiplier - Number of times a packets is missed before BFD declares the neighbor down.

On the Cisco CRS-1, the ranges are:
BGP—2 to 16
IS-IS—2 to 50
MPLS-TE—2 to 10
OSPF—2 to 50
One the Cisco XR 12000 Series Router, the ranges are:
BGP—3 to 16
IS-IS—3 to 50
MPLS-TE—3 to 10
OSPF—3 to 50