How long is the default NHRP cache timer?

The correct answer is A. 2 hours. The default NHRP (Next Hop Resolution Protocol) cache timer determines how long a mapping entry persists in the cache.

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Question

How long is the default NHRP cache timer?

Exhibit

Options

A2 hours
B1 hour
C30 minutes
D15 minutes

How the community answered

(26 responses)

A
88% (23)
C
4% (1)
D
8% (2)

Why each option

The default NHRP (Next Hop Resolution Protocol) cache timer determines how long a mapping entry persists in the cache.

A2 hoursCorrect

The default NHRP cache timer is 2 hours (7200 seconds), after which an entry in the NHRP cache will expire if not refreshed. This timer ensures that stale mappings are eventually removed, allowing for dynamic updates to next-hop information in DMVPN environments.

B1 hour

1 hour is not the default NHRP cache timer.

C30 minutes

30 minutes is not the default NHRP cache timer.

D15 minutes

15 minutes is not the default NHRP cache timer.

Concept tested: NHRP cache default timer

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_nhrp/configuration/15-mt/nhrp-15-mt-book/nhrp-cfg-nhrp.html

Topics

#NHRP#DMVPN#Timers

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