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Exam Name: Implementing Cisco Data Center Unified Fabric (DCUFI)
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Exam Name: Building Cisco Service Provider Next-Generation Networks, Part 1 (SPNGN1)
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NO.1 Which function does the graceful restart feature allow a Cisco Nexus 7000 Series router to
perform?
A. Perform a rapid route convergence.
B. Maintain a management connection throughout a router restart.
C. Remain in the data forwarding path through a process restart.
D. Initialize a standby supervisor transparently when one is present.
Answer: C
642-997 Dumps PDF
Explanation:
Graceful Restart and Non Stop Routing both allow for the forwarding of data packets to continue
along known routes while the routing protocol information is being restored (in the case of Graceful
Restart) or refreshed (in the case of Non Stop Routing) following a processor switchover. When
Graceful Restart is used, peer networking devices are informed, via protocol extensions prior to the
event, of the SSO capable routers ability to perform graceful restart. The peer device must have the
ability to understand this messaging. When a switchover occurs, the peer will continue to forward to
the switching over router as instructed by the GR process for each particular protocol, even though in
most cases the peering relationship needs to be rebuilt. Essentially, the peer router will give the
switching over router a "grace" period to re-establish the neighbor relationship, while continuing to
forward to the routes from that peer.
Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-
software/highavailability/solution_overview_c22-487228.html
NO.2 Which two advantages does FabricPath have over Spanning Tree in implementing a loop-free
network topology design? (Choose two.)
A. Multipath forwarding is supported for unicast and multicast Layer 2 and Layer 3 traffic.
B. Blocked links can be brought in to service if active links fail.
C. Convergence times are faster.
D. Unknown unicast addresses are flooded in through the originating port.
Answer: A,C
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