Span Sources; Characteristics Of Source Ports; Span Destinations - Cisco Nexus 7000 Series Configuration Manual

SPAN Sources

You can define the sources and destinations to monitor in a SPAN session on the local device.
SPAN Sources
The interfaces from which traffic can be monitored are called SPAN sources. Sources designate the traffic to
monitor and whether to copy ingress, egress, or both directions of traffic. SPAN sources include the following:
• Ethernet ports
• Port channels
• The inband interface to the control plane CPU
• VLANs (ingress only)—When a VLAN is specified as a SPAN source, all supported interfaces in the
• Remote SPAN (RSPAN) VLANs
• Fabric port channels connected to the Cisco Nexus 2000 Series Fabric Extender (FEX)
• Satellite ports and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender— These
A single SPAN session can include mixed sources in any combination of the above.
Note

Characteristics of Source Ports

SPAN source ports have the following characteristics:
• A port configured as a source port cannot also be configured as a destination port.
• An RSPAN VLAN cannot be used as a SPAN source.
• If you use the supervisor inband interface as a SPAN source, the following packets are monitored:

SPAN Destinations

SPAN destinations refer to the interfaces that monitor source ports. Destination ports receive the copied traffic
from SPAN sources.
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VLAN are SPAN sources.
interfaces are supported in Layer 2 access mode, Layer 2 trunk mode, and Layer 3 mode.
Layer 3 subinterfaces are not supported.
Note
◦ All packets that arrive on the supervisor hardware (ingress)
◦ All packets generated by the supervisor hardware (egress)
Configuring SPAN