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300-170 · Question #78

Refer to the Exhibits. The blade server has two HBAs. How many WWPN targets on VSAN 2001 are accessible to the blade server?

The correct answer is D. 4. A blade server equipped with two HBAs can achieve high availability and redundancy by accessing multiple WWPN targets on a given VSAN through its dual fabric connections.

Cisco UCS

Question

Refer to the Exhibits. The blade server has two HBAs. How many WWPN targets on VSAN 2001 are accessible to the blade server?

Exhibit

300-170 question #78 exhibit

Options

  • A1
  • B2
  • C3
  • D4

How the community answered

(19 responses)
  • A
    5% (1)
  • B
    11% (2)
  • C
    5% (1)
  • D
    79% (15)

Why each option

A blade server equipped with two HBAs can achieve high availability and redundancy by accessing multiple WWPN targets on a given VSAN through its dual fabric connections.

A1

One WWPN target is insufficient for redundant paths typically required in enterprise storage connectivity, leading to a single point of failure.

B2

Two WWPN targets would imply only one path per HBA, which might be the case for a single-path setup, but '4' suggests full redundancy through two HBAs each having multiple paths.

C3

Three WWPN targets is an uncommon number for symmetric redundancy in a dual-HBA setup, where paths are usually provisioned in even numbers.

D4Correct

In a typical Cisco UCS Fibre Channel over Ethernet (FCoE) setup, a blade server with two HBAs often connects to two separate Fabric Interconnects. If each Fabric Interconnect provides two paths or sees two targets within VSAN 2001 (e.g., through redundant upstream switches or storage controllers), then the two HBAs combined would provide access to four distinct WWPN targets. This configuration is common for multi-pathing and high availability to storage.

Concept tested: Fibre Channel path redundancy

Source: https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/sw/gui/config/guide/2-1/b_UCSM_GUI_Configuration_Guide_2_1/b_UCSM_GUI_Configuration_Guide_2_1_chapter_010000.html

Topics

#Fibre Channel#WWPN#VSAN#SAN zoning#Cisco UCS

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