You have recently implemented a graceful Routing-Engine switchover (GRES) and want to
further reduce down time if a Routing Engine (RE) failure occurs. Which two features can be
configured on this device to reduce its downtime in this situation? (Choose two)
A.
VRRP
B.
GR
C.
BFD
D.
NSR
“Because of these feature differences, nonstop routing and graceful restart are mutually exclusive. Nonstop active routing cannot be enabled when the router is configured as a graceful restarting router.”
http://www.juniper.net/techpubs/en_US/junos15.1/topics/concept/high-availability-features-in-junos-introducing.html
The answer should be A and D. VRRP will allow for redundancy between two REs (master and slave, for failover) and Nonstop Routing has to be enabled with GRES.
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well the question does not say: Which two features can be configured on this device at the same time -in that sense you can go with either GR or NSR
VRRP will facilitate redundancy between two devices(physical/virtual) not REs
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You can go either with GR or NSR (Not a same time of course). These answers are correct
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