Private addresses: Difference between revisions

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Here is how the private addresses work.  
Here is how the private addresses work. Form:
 
* Teague: please correct, I left my notebook in SF.
 
Form:
  10.XXX.YYY.ZZZ
  10.XXX.YYY.ZZZ


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


= YYY =  
= YYY =  


First digit: 0=private network ; 1 = IPMI  
* First Digit: 0 if physical.  1 if IPMI.  2 if VM
Second digit: rack number
* Second & Third Digits = Rack # (0-99)
Third digit: 0 = physical, 1,2,3,4... = this is a VM


= ZZZ =  
= ZZZ =  
If physical, then second and third digits = physical location in rack.  
* 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.  


If virtual, then serial number, starting from 1.
Clear as mud?


First digit is to handle the case that there are 4 machines in 2U, as in SiM 4-in-1 2U machines.


[[Category:Sysadmin]]
[[Category:Sysadmin]]

Latest revision as of 23:40, 19 October 2018

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 Digit: 0 if physical. 1 if IPMI. 2 if VM
  • Second & Third Digits = Rack # (0-99)

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?

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