Cisco Catalyst 3120 User Manual

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Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
OL-12247-01
Chapter 29 Configuring SPAN and RSPAN
Configuring SPAN and RSPAN
SPAN and RSPAN and Switch Stacks
Because the stack of switches is treated as one logical switch, local SPAN source ports and destination
ports can be in different switches in the stack. Therefore, the addition or deletion of switches in the stack
can affect a local SPAN session, as well as an RSPAN source or destination session. An active session
can become inactive when a switch is removed from the stack or an inactive session can become active
when a switch is added to the stack.
For more information about switch stacks, see Chapter 5, “Managing Switch Stacks.”
Configuring SPAN and RSPAN
These sections contain this configuration information:
• Default SPAN and RSPAN Configuration, page 29-11
• Configuring Local SPAN, page 29-11
• Configuring RSPAN, page 29-17
Default SPAN and RSPAN Configuration
Table 29-1 shows the default SPAN and RSPAN configuration.
Configuring Local SPAN
These sections contain this configuration information:
• SPAN Configuration Guidelines, page 29-12
• Creating a Local SPAN Session, page 29-13
• Creating a Local SPAN Session and Configuring Incoming Traffic, page 29-15
• Specifying VLANs to Filter, page 29-16
Table 29-1 Default SPAN and RSPAN Configuration
Feature Default Setting
SPAN state (SPAN and RSPAN) Disabled.
Source port traffic to monitor Both received and sent traffic (both).
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
monitored.
RSPAN VLANs None configured.

Cisco Catalyst 3120 Specifications

General

Brand	Cisco
Model	Catalyst 3120
Category	Switch
Language	English