JN0-364: Service Provider Routing and Switching, Specialist (JNCIS-SP)

By Juniper · Question Mode

QuestionQ20

High Availability

You are designing a highly available solution for a Juniper router with dual Routing Engines (REs). You need the routing protocol state to be retained during an RE switchover. Graceful Routing Engine switchover (GRES) is already enabled, and you want to avoid depending on helper routers to preserve the routing protocol state.

In this scenario, which feature achieves this behavior?

Explanation

Nonstop active routing (NSR) uses GRES while running and synchronizing routing protocol state on the backup Routing Engine. This preserves that state across a Routing Engine switchover without relying on neighboring helper routers, whereas graceful restart uses helper routers to restore protocol information.

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