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F5 BIG-IP LTM Specialist: Architect, Setup, and Deploy (301a) Exam Materials - Question #71 Discussion

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A design requires the LTM device to become HA standby when one of the two physical interfaces on the External trunk is down. The External trunk is an interface on the External VLAN. Which TMOS command enables this behavior? (Choose one answer)

  • A. tmsh create sys ha-group External trunks add { External }
  • B. tmsh modify net vlan External failsafe enabled
  • C. tmsh create sys ha-group External trunks add { External attribute percent-up-members 100 }
  • D. tmsh create sys ha-group External trunks add { External threshold 2 weight 101 }
Correct Answer: D

Brave-Dump Community Votes

Answer: D (2 votes) 66.67%
Answer: C (1 vote) 33.33%

Community Explanations & Comments (3)

Sachin 9 months ago
Selected: C
Correct Answer : C
https://techdocs.f5.com/en-us/bigip-14-1-0/big-ip-device-service-clustering-administration-14-1-0/managing-failover.html
jansen 6 months ago
Selected: D
Threshold 2: This setting specifies that the trunk must have at least 2 active members to contribute its weight to the device's total score. If the count drops to 1, the condition is no longer met.
Weight 101: By assigning a weight higher than the default (usually 100), losing this trunk's contribution will cause the device's total score to drop significantly, forcing it into a Standby state so the peer (with a higher score) can take over.
why c is incorrect，While "100%" sounds logical, the standard tmsh syntax for this specific HA Group behavior relies on the threshold and weight parameters to influence the health score.
Anonymous User 1 month ago
Selected: D
D