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Which two FEX connection modes are correct? (Choose two.)
A. hard-pinning mode
B. soft-pinning mode
C. port channel mode
D. physical-pinning mode
E. vlan pinning mode
Correct Answer: AC
Explanation/Reference:
Explanation:
You can connect the FEX to the FI in two ways. Cisco UCS Manager FI discovers the FEX based on the FEX/Chassis discovery mode. The FEX connection modes are:
Hard-Pinning mode: The server facing FEX ports are pinned to the connected uplink ports when the FEX is discovered. Cisco UCS Manager pins the server-facing ports to the uplink ports based on the number of acknowledged uplink ports. After the pinning, if you add a new uplink or delete an existing uplink, you must manually acknowledge the FEX to apply the changes.
Port-Channel mode: Port-Channel mode does not have pinning. A single port channel works as the uplink to all server-facing ports. And all uplink ports are members of this single port channel. If one of the uplink ports go down, the traffic is automatically distributed to another available uplink port.
Reference: http://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/c-series_integration/ucsm2-1/b_UCSM2-1_C-Integration/b_UCSM2-1_C-Integration_chapter_01.html#concept_774B705BE3594D4EA81050E408629FEE