Characteristics Of Destination Ports; Span Sessions; Localized Span Sessions - Cisco Nexus 9000 Series Configuration Manual

Configuring SPAN
• Uplink ports on Cisco Nexus 9300 Series switches
Note FEX ports are not supported as SPAN destination ports.

Characteristics of Destination Ports

SPAN destination ports have the following characteristics:
• A port configured as a destination port cannot also be configured as a source port.
• A destination port can be configured in only one SPAN session at a time.
• Destination ports do not participate in any spanning tree instance. SPAN output includes bridge protocol

SPAN Sessions

You can create SPAN sessions to designate sources and destinations to monitor.
See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported
SPAN sessions.
This figure shows a SPAN configuration. Packets on three Ethernet ports are copied to destination port Ethernet
2/5. Only traffic in the direction specified is copied.
Figure 4: SPAN Configuration

Localized SPAN Sessions

A SPAN session is localized when all of the source interfaces are on the same line card. A session destination
interface can be on any line card.
A SPAN session with a VLAN source is not localized.
Note
data unit (BPDU) Spanning Tree Protocol hello packets.
Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x
SPAN Sessions
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