32-12
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 32 Configuring SPAN and RSPAN
Configuring SPAN and RSPAN
Configuring SPAN and RSPAN
• Default SPAN and RSPAN Configuration, page 32-12
• Configuring Local SPAN, page 32-12
• Configuring RSPAN, page 32-17
Default SPAN and RSPAN Configuration
Configuring Local SPAN
• SPAN Configuration Guidelines, page 32-12
• Creating a Local SPAN Session, page 32-13
• Creating a Local SPAN Session and Configuring Incoming Traffic, page 32-15
• Specifying VLANs to Filter, page 32-16
SPAN Configuration Guidelines
• On each switch stack, you can configure a maximum of 2 source sessions and 64 RSPAN destination
sessions. A source session is either a local SPAN session or an RSPAN source session.
• For SPAN sources, you can monitor traffic for a single port or VLAN or a series or range of ports
or VLANs for each session. You cannot mix source ports and source VLANs within a single SPAN
session.
• The destination port cannot be a source port; a source port cannot be a destination port.
• You cannot have two SPAN sessions using the same destination port.
• When you configure a switch port as a SPAN destination port, it is no longer a normal switch port;
only monitored traffic passes through the SPAN destination port.
• Entering SPAN configuration commands does not remove previously configured SPAN parameters.
You must enter the no monitor session {session_number | all | local | remote} global configuration
command to delete configured SPAN parameters.
Ta ble 32-1 Default SPAN and RSPAN Configuration
Feature Default Setting
SPAN state (SPAN and RSPAN) Disabled.
Source port traffic to monitor Both received and sent traffic (bo
th).
Encapsulation type (destination port) Native form (untagged packets).
Ingress forwarding (destination port) Disabled
VLAN filtering On a trunk interface used as a source port, all VLANs are
mon
itored.
RSPAN VLANs None configured.
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