Private addresses: Difference between revisions

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* First digit: 0=private network ; 1 = IPMI
* First & Second Digits = Rack # (up to 100 Racks)
* Second digit: rack number (0-7)
* Third digit: 0 = physical, 1,2,3,4... = is a VM
* Third digit: 0 = physical, 1,2,3,4... = is a VM



Revision as of 17:22, 12 October 2017

Here is how the private addresses work. Form:

10.XXX.YYY.ZZZ

XXX

  • First digit: future use
  • Second digit: cluster # ; 0=UCSF legacy, 1=UofT, 2=UCSF new
  • Third digit: 0 = cluster, 1=desktops, 9=virtual isolation

YYY

  • First & Second Digits = Rack # (up to 100 Racks)
  • Third digit: 0 = physical, 1,2,3,4... = is a VM

ZZZ

  • If physical, then second and third digits = physical location in rack.
  • If virtual, then serial number, starting from 1.
  • Use first digit if there are 4 machines in 2U, as in SiM 4-in-1 2U machines.

Examples

  • 10.0.20.12 - UCSF legacy cluster 0 (0), physical computer located in slot 12 (and possibly above) of rack 2
  • 10.20.26.11 - UCSF new cluster 2 (20), VM hosted in rack 2, this is the 11th VM hosted on the the sixth VM host in that rack
  • 10.10.110.9 - Toronto cluster 1 (10), this is the IPMI address for a physical machine in rack 1, in slot 9 (and possibly above)
  • 10.20.20.111 - UCSF new cluster (20), rack 2, this is a 4-in-1 computer in slot 11 and 12.

Clear as mud?