Span And Rspan And Switch Stacks; Default Span And Rspan Configuration - Cisco Catalyst 2960 Software Configuration Manual

Configuring SPAN and RSPAN
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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
Configuring SPAN and RSPAN
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Default SPAN and RSPAN Configuration

Table 27-1
Table 27-1
Feature
SPAN state (SPAN and RSPAN)
Source port traffic to monitor
Encapsulation type (destination port)
Ingress forwarding (destination port)
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
27-10
If a physical port that belongs to an EtherChannel group is a destination port and the EtherChannel
group is a source, the port is removed from the EtherChannel group and from the list of monitored
ports.
Multicast traffic can be monitored. For egress and ingress port monitoring, only a single unedited
packet is sent to the SPAN destination port. It does not reflect the number of times the multicast
packet is sent.
A secure port cannot be a SPAN destination port.
For SPAN sessions, do not enable port security on ports with monitored egress when ingress
forwarding is enabled on the destination port. For RSPAN source sessions, do not enable port
security on any ports with monitored egress.
An IEEE 802.1x port can be a SPAN source port. You can enable IEEE 802.1x on a port that is a
SPAN destination port; however, IEEE 802.1x is disabled until the port is removed as a SPAN
destination.
For SPAN sessions, do not enable IEEE 802.1x on ports with monitored egress when ingress
forwarding is enabled on the destination port. For RSPAN source sessions, do not enable
IEEE 802.1x on any ports that are egress monitored.
Default SPAN and RSPAN Configuration, page 27-10
Configuring Local SPAN, page 27-11
Configuring RSPAN, page 27-17
shows the default SPAN and RSPAN configuration.
Default SPAN and RSPAN Configuration
Chapter 27
Chapter 7, "Managing Switch Stacks."
Default Setting
Disabled.
Both received and sent traffic (both).
Native form (untagged packets).
Disabled
Configuring SPAN and RSPAN
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