Graceful Restart (GR) JN0-281 Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A Juniper router running OSPF with Graceful Restart enabled restarts its routing process. A neighbor that does not support GR is connected to the router. What is the expected behavior on the non-GR neighbor?

   • AThe neighbor will declare the OSPF adjacency down and recalculate its routing table.
   • BThe neighbor will send a notification to the restarting router asking it to delay the restart.
   • CThe neighbor will keep the adjacency up but will not forward traffic through the restarting router.
   • DThe neighbor will keep the adjacency up and continue to forward traffic as if nothing happened.
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2. 17application · medium

   After configuring Graceful Restart for OSPF on a Juniper router, an engineer wants to verify that the local router is capable of acting as a GR helper for its neighbors. Which command provides this information?

   • Ashow route protocol ospf
   • Bshow configuration protocols ospf
   • Cshow ospf overview
   • Dshow ospf neighbor
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4. 18application · medium

   A service provider runs OSPF across a core network of MX-series routers. During a planned software upgrade, one core router's routing process will restart. The network team wants to ensure that transit traffic through this router continues to be forwarded without interruption while the routing protocol re-establishes its adjacencies. What must be true for this to work as intended?

   • AThe router's OSPF adjacencies are configured with a shorter hello interval to speed up re-convergence after the restart.
   • BThe router's Routing Engine has redundant partitions so the routing process can fail over to a backup partition instantly.
   • CThe router's forwarding table is retained in the Packet Forwarding Engine (PFE) during the restart, and all OSPF neighbors also have Graceful Restart enabled.
   • DThe router is configured with Bidirectional Forwarding Detection (BFD) to detect the restart faster than the OSPF dead timer.
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5. 19foundation · easy

   What is a prerequisite for a router to act as a helper for Graceful Restart?

   • AIt must be running the same Junos version as the restarting router
   • BIt must have a redundant power supply
   • CIt must have GR capability enabled for the protocol
   • DIt must be configured with a higher priority than the restarting router
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6. 20expert · hard

   A network engineer is configuring Graceful Restart for both OSPF and BGP on a Juniper router. The router will act as a helper for OSPF neighbors and as a restarting router for BGP peers. Which configuration approach is correct?

   • AEnable GR globally under 'routing-options' and it will apply to all protocols.
   • BEnable GR under 'protocols bgp' only, and OSPF will inherit the setting.
   • CEnable GR under 'protocols ospf' only, and BGP will inherit the setting.
   • DEnable GR separately under 'protocols ospf' and 'protocols bgp'.
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