000-221 · Question #226
Based on the following graphic, which physical adapter services fcs2?
The correct answer is C. fcs6 on viol. In a VIOS fiber channel configuration, each client LPAR virtual FC adapter is mapped to a specific physical FC adapter on a VIO server, as shown in the N-Port ID Virtualization mapping graphic.
Question
Based on the following graphic, which physical adapter services fcs2?
Options
- Afcs2 on vio1
- Bfcs2 on vio2
- Cfcs6 on viol
- Dfcs6 on vio2
How the community answered
(38 responses)- A3% (1)
- B5% (2)
- C82% (31)
- D11% (4)
Why each option
In a VIOS fiber channel configuration, each client LPAR virtual FC adapter is mapped to a specific physical FC adapter on a VIO server, as shown in the N-Port ID Virtualization mapping graphic.
fcs2 on vio1 is a different physical adapter on the first VIO server and is not the one the graphic shows as mapped to the client's fcs2 virtual device.
fcs2 on vio2 is a physical adapter on the second VIO server; the graphic indicates the mapping for this virtual adapter goes through vio1, not vio2.
In VIOS environments, virtual fiber channel adapters on client LPARs are backed by physical FC adapters on a VIO server. The graphic shows that the physical adapter fcs6 residing on vio1 is the adapter mapped to service the client's fcs2 virtual FC device, meaning all I/O for that virtual adapter flows through fcs6 on vio1.
fcs6 on vio2 is on the second VIO server, but the graphic shows the backing physical adapter for the client's fcs2 is on vio1, not vio2.
Concept tested: VIOS virtual-to-physical fiber channel adapter mapping
Source: https://www.ibm.com/docs/en/power-systems/power8?topic=server-virtual-fibre-channel
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