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Status Not under consideration
Workspace IBM Z and LinuxONE Systems Hardware
Categories HMC/Support Element (SE)
Created by Guest
Created on May 18, 2022

RELATED IDEAS

Allow all vHMA IP addresses to be in the same network

Prior to the creation of VLANs, having multiple IP addresses in different networks was preferred for redundancy. With the advent of VLANs and the ability to have the same network segment presented in multiple physical network switches, there is no reason presented for still having the HMC/SE addresses in different networks. Most customers want to have a single "management LAN" where you can have multiple interfaces to a server (like the vHMA) physically distributed but logically in the same network. I recommend removing the restriction in the Network Definition panels that the 2nd set of IP addresses per HMC/SE be in a different network from the first set of addresses.

Idea priority Medium
  • Guest
    Reply
    |     Jun 21, 2022
    First and foremost the goal of the HMC networking support is to provide the ability to achieve fully redundant network paths using the 2 customer network ports. Through the use of "current technologies" it would be possible to have these 2 customer network ports on the same logical network while still achieving physical redundancy. Using the same technologies It is also possible to easily achieve the same thing when these ports are not on the same logical network. By adding this capability, the 2 customer networks could be put on the same logical network even when there is not physical redundancy. Regardless of how much documentation is provided to warn that doing this would not provide complete physical redundancy, it would still be done. For this reason, adding this support is not something we intend to do.

    With respect to this request, HMA HMCs are no different than Standalone HMCs -> https://ibm-z-hardware-and-operating-systems.ideas.ibm.com/ideas/ZL1S-I-380

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