IBM Fusion

IBM Fusion

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  • 1.  Storage Fusion HCI management access

    Posted Thu June 08, 2023 10:43 AM

    Hello Community,

    I am certain some of you might have run in similar situations. We needed to shutdown the Fusion HCI due to a power maintenence. Some little detail was lost on the networking configuration - the portion where DHCP helper information was configured. When powering back up, nothing really happened, since without DHCP nothing will start. We were quite swiflty certain how to fix it, yet we needed someone to go to the rack and locally check the DHCP helper config on the highspeed switches.

    My question is not about this issue, but was raised by this incident:

    Do you have a little local jump host in the Fusion HCI rack to have a "emergency" access to the hardware management? I was thinking about installing a NUC with two interfaces, where the inward facing interface is connected to the 1G switch, while the other interface connects to the company network. What are your general thoughts about such a device?

    kind regards
    Konrad



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    Konrad Trojok
    Head of Competence Center IBM Storage
    #IBMChampion #SVA
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  • 2.  RE: Storage Fusion HCI management access

    Posted Mon June 12, 2023 09:32 AM

    @Konrad Trojok I agree with the scenario mentioned.

    I've got two clients that have a jump server that is directly attached (cross-over Cat5 RJ45 cable) to port 47 of one of the management switches. We have used this method as a means to remotely install Fusion HCI. This also serves as a method to avoid visit to the DC or long periods of activity within the DC during troubleshooting unless there is some physical intervention required.



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    Reginald D'Souza
    Principal Engineer
    IBM
    Melbourne
    (41) 740-6532
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  • 3.  RE: Storage Fusion HCI management access

    Posted Sat August 19, 2023 02:32 PM

    @Reginald D'Souza a simple solution as an alternate to spending hours in a DC, which can be inhospitable at times.



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    Sandeep Sharma
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  • 4.  RE: Storage Fusion HCI management access

    Posted Tue June 13, 2023 09:45 AM

    Hi Konrad,

    you are right, if the network connectivity is lost via the two high speed switches, we need a physical access to the HCI and a direct connection via 1Gbit. 
    This will allow us to access the node coreOS and the switches. 


    It is a viable approach to connect a small jumphost to one of the 1Gbit switches and the customer network.
    On the 1Gbit switches, we only use IPv6, so there are no duplicate IPs. 

    I have seen this on internal lab systems, but not yet on a customer installation.

    Feel free to call me if you have furhter questions. 



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    Daniel Danner
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