R0 is a Juniper Networks MX router with dual Routing Engines. You must load new software on
R0 while ensuring no control plane disruption and minimal data loss.
Which three features meet the requirement? (Choose three.)
A.
graceful restart
B.
NSR
C.
graceful Routing-Engine switchover (GRES)
D.
unified ISSU
E.
BFD
Explanation:
The unified in-service software upgrade (ISSU) feature enables you to upgrade between two different Junos OS releases with no disruption on the control plane and with minimal disruption of traffic.
Unified ISSU takes advantage of the redundancy provided by dual Routing Engines and works in conjunction with the graceful Routing Engine switchover feature and the nonstop active routing feature.
0
0
B C D
0
0