Re: Anybody with experiences with managing more than one Power 10(or 11) server with one HMC - the local P10 and a remote P10 across the WAN?

As I reread your OP we do use physical IP addresses and not DHCP.
I do believe they are on the same vlan.

On Fri, Aug 21, 2026 at 7:58 AM Rob Berendt <[email protected]>
wrote:

> Here's the deal.  Many people think that the cord between your HMC and
> your Power System needs to be dedicated and all three should be in a
> concrete bunker.  They find it perfectly fine that your payroll data,
> confidential engineering plans, nuclear launch codes, etc are on your
> corporate network, but it's curtains for the free world if anyone can
> access your HMC port on your Power System.  I disagree.
> We have two Power Systems in Indy.  We have one Power system outside of
> Grand Rapids MI.  We have no physical HMCs.  We use virtual HMC's instead.
> The vHMC in GR can access all power systems in both locations.  The vHMC in
> Indy can access all Power systems in all locations.  I believe you are
> limited to 3 HMCs per power system.  The only time I hit that was when we
> converted from two physical HMCs to two vHMCs and tried to have all four
> active during the conversion.
>
>
> On Thu, Aug 20, 2026 at 6:19 PM Barry Chu <[email protected]>
> wrote:
>
>> I would like to be able to manage both a local Power 10 and a remote Power
>> 10 (as a backup) across the WAN. The remote P10 has a local HMC already of
>> course.
>>
>> Documentations suggests that the T1 (the second eBMC port on the Power 10)
>> has to be in the same subnet as the HMC in the remote DC which means
>> stretching the VLAN across the WAN.
>>
>> The port C0-T5-T1 in this diagram
>>
>> https://share.google/D2ucqvIEJe68Pr1BC
>>
>> Our network team is not keen on that and have asked why can't we use Layer
>> 3 routing and not rely on the HMC being a DHCP server but use fixed IP.
>>
>> Anybody doing this and what are your experiences?
>>
>> Thanks
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