Home » IBM » C1000-031 » Which of the following is a requirement for both HMCs to be able to manage all the systems?
A customer would like to add a second HMC to an environment which consists of multiple POWER8 and POWER9 processor-based systems.
Which of the following is a requirement for both HMCs to be able to manage all the systems?
A. Both HMCs must be at the same version of HMC Code.
B. Both HMCs must be on the same HMC VLAN.
C. All the POWER8 processor-based systems must be at the same firmware level.
D. Each HMC must be on a dedicated HMC VLAN.
Correct Answer: D
Explanation/Reference:
Explanation:
A switch can be partitioned to create a VLAN dedicated to HMC to managed server communication. If HMCs are configured as DHCP servers, there must be only one HMC on each VLAN! If dual HMCs are attached for redundancy, it is unwise to connect the HMCs to two VLANs in the same switch, because if the switch fails both HMCs lose connectivty, thereby defeating the HMC redundancy
Reference: https://www.ibm.com/developerworks/community/wikis/home/wiki/Power%20Systems/page/HMC%20reliable%20communication%20and%20doing%20without
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