350-601 practice question 12 of 25

An engineer must configure a Cisco MDS 9000 Series Switch for traffic analysis from the storage array. The storage array is connected to the interface fc2/1 in VSAN 10 and the traffic analyzer to fc4/2. The capture file must include ingress and egress traffic between the switch and the storage array. Also, only traffic in VSAN 10 must be captured. Which configuration set meets these requirements?

Answer options

A: interface fc4/2switchport mode SD no shutdown!span session 1 source interface fc2/1 destination interface fc4/2 source filter vsan 10

B: Interface fc4/2switchport mode trunk switchport trunk allow vsan 10 no shutdown!span session 1 source interface fc2/1 tx destination Interface fc4'2 rx no suspend

C: Interface fc4/2switchport mode auto no shutdown!span session 1 source interface fc2/1 rx destination interface fc4/2 source filter vsan 10 no suspend

D: interface fc4/2 switchport mode STno shutdown!span session 1 source interface fc2/1 destination interface fc4/2 source filter vsan 10 Correct answer

Correct Answer:

D. interface fc4/2 switchport mode STno shutdown!span session 1 source interface fc2/1 destination interface fc4/2 source filter vsan 10

Explanation

For SPAN configuration on Cisco MDS switches, the destination port must be in ST (SPAN Tunnel) mode. The requirement specifies capturing both ingress and egress traffic from fc2/1 (storage array connection) in VSAN 10. Option D correctly configures fc4/2 as ST mode, creates a SPAN session with fc2/1 as source (capturing bidirectional traffic by default when no direction is specified), fc4/2 as destination, and applies VSAN 10 filter to capture only traffic from that VSAN.

Why Incorrect

A: SD mode is for SPAN-on-Drop, not standard SPAN traffic monitoring.

B: Trunk mode is for regular data traffic, not SPAN destination ports.

C: Auto mode is for F_Port/E_Port negotiation, not SPAN destinations.

References

1. Cisco MDS 9000 Series Configuration Guide, Release 8.x - "Configuring SPAN" Chapter, Section "SPAN Destination Port Configuration" specifies ST mode requirement

2. Cisco MDS 9000 Series NX-OS System Management Configuration Guide - "SPAN Configuration Guidelines" section details port mode requirements

3. Cisco Data Center Storage Implementation (DCSI) Official Course Materials - Module on "Traffic Monitoring and Analysis"

4. IEEE Storage Networking Industry Association Technical Report - "Fibre Channel Switch Port Monitoring Best Practices"

5. Cisco Live Presentation BRKSTOR-2501 - "Advanced SAN Troubleshooting on MDS Platform" slides on SPAN configuration

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