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Question 146

-- Exhibit

-- Exhibit --

Refer to the exhibit.

A virtual server is set up on an LTM device as follows:

Virtual server address 78.24.213.79

Default Persistence ProfilE. source_addr, 600s.

Pool NamE. Pool1 -

Pool Members: 10.72.250.52:80 and 10.72.250.60:80 (both on Internal Vlan)

There are several current connections to the virtual server, and pool member 10.72.250.52:80 has been set to a "Disabled" state.

A tcpdump on the Internal Vlan shows traffic going to 10.72.250.52:80.

How soon after the persistence table query was run can existing connections be refreshed/renewed to ensure that no requests are sent to 10.72.250.52?

    Correct Answer: B

    To prevent any requests from being sent to the disabled pool member 10.72.250.52:80, we need to calculate how long it will take for the connections to expire based on the persistence profile's timer settings. The persistence profile is set for 600 seconds. The current age of the oldest connection to 10.72.250.52:80 in the persistence table is 140 seconds. Therefore, the connections will persist for another 460 seconds (600 - 140), after which they will expire. Hence, no requests will be sent to the disabled pool member after 460 seconds.

Discussion
exatakerOption: C

Why539? Should it be 460 instead?

KalakutaOption: B

Default Persistence Profile timer is set 600s and the latest connection to pool member .52 has Age = 140 sec -> B is valid with 460 sec.

DegenhardtOption: B

Not sure... First persistence table entry is the most recent one so it should be 460.

GVKDOption: B

B - Correct