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Which three options are valid SPAN sources? (Choose three.)
A. VLANs, because when a VLAN is specified as a SPAN source, all supported interfaces in the VLAN are SPAN sources
B. fabric port channels connected to the Cisco Nexus 2000 Series Fabric Extender
C. Layer 2 subinterfaces
D. satellite ports and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender
E. Layer 3 subinterfaces
F. Remote Span Ethernet Ports
Correct Answer: ABD
Explanation/Reference:
Explanation:
The interfaces from which traffic can be monitored are called SPAN sources. These include Ethernet, virtual Ethernet, port-channel, and VLAN. When a VLAN is specified as a SPAN source, all supported interfaces in the VLAN are SPAN sources. Traffic can be monitored in the receive direction, the transmit direction, or both directions for Ethernet and virtual Ethernet source interfaces.
Receive source (Rx) — Traffic that enters the switch through this source port is copied to the SPAN destination port.
Transmit source (Tx) — Traffic that exits the switch through this source port is copied to the SPAN destination port.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3/troubleshooting/configuration/guide/ n1000v_trouble/n1000v_trouble_15span.html