Span Sources; Characteristics Of Source Ports; Span Destinations - Cisco Nexus 3548 series Configuration Manual

SPAN Sources

• Beginning with Cisco NX-OS Release 6.0(2)A8(6), you can monitor the same source interfaces (physical

SPAN Sources

SPAN sources refer to the interfaces from which traffic can be monitored. The Cisco Nexus device supports
Ethernet, port channels, and VLANs as SPAN sources. With VLANs, all supported interfaces in the specified
VLAN are included as SPAN sources. You can choose the SPAN traffic in the ingress direction, the egress
direction, or both directions for Ethernet source interfaces:
• Ingress source (Rx)—Traffic entering the device through this source port is copied to the SPAN destination
• Egress source (Tx)—Traffic exiting the device through this source port is copied to the SPAN destination

Characteristics of Source Ports

A source port, also called a monitored port, is a switched interface that you monitor for network traffic analysis.
The switch supports any number of ingress source ports (up to the maximum number of available ports on
the switch) and any number of source VLANs.
A source port has these characteristics:
• Can be of Ethernet, port channel, or VLAN port type.
• Cannot be a destination port.
• Can be configured with a direction (ingress, egress, or both) to monitor. For VLAN sources, the monitored
• Can be in the same or different VLANs.
Note
• The maximum number of source ports per SPAN session is 128 ports.

SPAN Destinations

SPAN destinations refer to the interfaces that monitors source ports. The Cisco Nexus Series device supports
Ethernet interfaces as SPAN destinations.
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port or port-channel) in multiple local SPAN sessions.
port.
port.
direction can only be ingress and applies to all physical ports in the group. The RX/TX option is not
available for VLAN SPAN sessions.
Configuring SPAN