Characteristics Of Destination Ports; Span Sessions - Cisco Nexus 7000 Series Configuration Manual

Configuring SPAN

Characteristics of Destination Ports

SPAN destination ports have the following characteristics:
• Destinations for a SPAN session include Ethernet ports or port-channel interfaces in either access or
• 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
• All SPAN destinations configured for a given session receive all spanned traffic.
• An RSPAN VLAN cannot be used as a SPAN destination.
• You can configure SPAN destinations to inject packets to disrupt a certain TCP packet stream in support
• You can configure SPAN destinations to enable a forwarding engine to learn the MAC address of the
• F Series module FabricPath core ports, Fabric Extender host interface (HIF) ports, HIF port channels,
• Shared interfaces cannot be used as SPAN destinations.
• VLAN ACL redirects to SPAN destination ports are not supported
• All SPAN destinations configured for a given session receive all spanned traffic.

SPAN Sessions

You can create SPAN sessions to designate sources and destinations to monitor.
See the Cisco Nexus 7000 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
trunk mode.
data unit (BPDU) Spanning-Tree Protocol hello packets.
of the Intrusion Detection System (IDS).
IDS.
and fabric port-channel ports are not supported as SPAN destination ports.
Cisco Nexus 7000 Series NX-OS System Management Configuration Guide
SPAN Sessions
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