A network engineer is preparing to enable GRES on a dual-RE MX204 router. The router currently runs Junos OS 19.1R1. The engineer has verified that both Routing Engines are the same hardware model and have the same amount of memory. What additional requirement must be met before GRES can be successfully enabled?

The router must have redundant power supplies.

The router must be configured with nonstop routing (NSR).

Both Routing Engines must run the same Junos OS version.

The backup RE must be the master RE before configuration.

A service provider is considering enabling GRES on a router that carries BGP traffic with many peers. The network engineer notes that GRES alone will not preserve BGP sessions during an RE switchover. What is the primary reason for this limitation?

GRES requires both REs to have the same hardware, which is not always possible.

GRES only preserves the forwarding table, not the state of routing protocols.

GRES requires a reboot to take effect, which disrupts BGP sessions.

GRES only works with OSPF, not BGP.

A network engineer has enabled GRES on a dual-RE router. The engineer wants to confirm that the backup RE has synchronized the forwarding table. Which command output should the engineer look for?

In the show route summary output, the 'Routes' field should show the same number of routes on both REs.

In the show system uptime output, the 'Uptime' field should be the same on both REs.

In the show interfaces terse output, the 'Status' field should show 'Up' for all interfaces.

In the show task replication output, the 'State' field for the backup RE should be 'Ready'.

Juniper NetworksCertified Specialist, Service Provider Routing and Switching (JNCIS-SP)

Domain 10Objective 3

Graceful Routing Engine Switchover (GRES) JN0-364 Practice Questions (Page 3)

Part of the High Availability domain, which makes up ~12% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–7 in this domain), expect 1–1 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

6concepts

Questions 11–15

11application · medium
A network engineer is preparing to enable GRES on a dual-RE MX204 router. The router currently runs Junos OS 19.1R1. The engineer has verified that both Routing Engines are the same hardware model and have the same amount of memory. What additional requirement must be met before GRES can be successfully enabled?
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12expert · hard
A service provider is designing a high-availability solution for a router that carries both IPv4 and IPv6 traffic. The provider wants to ensure that both address families continue to forward traffic during an RE switchover. The provider does not require protocol state to be preserved. What should the provider enable?
Select an answer first
13application · medium
A service provider is considering enabling GRES on a router that carries BGP traffic with many peers. The network engineer notes that GRES alone will not preserve BGP sessions during an RE switchover. What is the primary reason for this limitation?
Select an answer first
14application · medium
A network engineer has enabled GRES on a dual-RE router. The engineer wants to confirm that the backup RE has synchronized the forwarding table. Which command output should the engineer look for?
Select an answer first
15expert · hard
A service provider operates a network with two MX960 routers in a redundant configuration. The routers run BGP and OSPF. The provider wants to perform a software upgrade on one router. The upgrade requires an RE switchover. The provider must ensure that transit traffic is not disrupted, but BGP and OSPF sessions can restart. The provider also wants to minimize the time the router is in a degraded state. Which feature should the provider enable?
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Graceful Routing Engine Switchover (GRES) JN0-364 Practice Questions (Page 3)

Questions 11–15

A service provider is considering enabling GRES on a router that carries BGP traffic with many peers. The network engineer notes that GRES alone will not preserve BGP sessions during an RE switchover. What is the primary reason for this limitation?

A network engineer has enabled GRES on a dual-RE router. The engineer wants to confirm that the backup RE has synchronized the forwarding table. Which command output should the engineer look for?

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