Configuring Span And Rspan; Default Span And Rspan Configuration - Cisco WS-C3560-48PS-S Software Configuration Manual

Chapter 23

Configuring SPAN and RSPAN

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Configuring SPAN and RSPAN
This section describes how to configure SPAN on your switch. It contains this configuration information:
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Default SPAN and RSPAN Configuration

Table 23-1
Table 23-1 Default SPAN and RSPAN Configuration
Feature
SPAN state (SPAN and RSPAN)
Source port traffic to monitor
Encapsulation type (destination port)
Ingress forwarding (destination port)
VLAN filtering
RSPAN VLANs
78-16156-01
A physical port that belongs to an EtherChannel group can be configured as a SPAN source port and
still be a part of the EtherChannel. In this case, data from the physical port is monitored as it
participates in the EtherChannel. However, if a physical port that belongs to an EtherChannel group
is configured as a SPAN destination, it is removed from the group. After the port is removed from
the SPAN session, it rejoins the EtherChannel group. Ports removed from an EtherChannel group
remain members of the group, but they are in the inactive or standalone state.
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 802.1X port can be a SPAN source port. You can enable 802.1X on a port that is a SPAN
destination port; however, 802.1X is disabled until the port is removed as a SPAN destination.
For SPAN sessions, do not enable 802.1X on ports with monitored egress when ingress forwarding
is enabled on the destination port. For RSPAN source sessions, do not enable 802.1X on any ports
that are egress monitored.
Default SPAN and RSPAN Configuration, page 23-9
Configuring Local SPAN, page 23-10
Configuring RSPAN, page 23-16
shows the default SPAN and RSPAN configuration.
Default Setting
Disabled.
Both received and sent traffic (both).
Native form (untagged packets).
Disabled
On a trunk interface used as a source port, all VLANs are
monitored.
None configured.
Catalyst 3560 Switch Software Configuration Guide
Configuring SPAN and RSPAN
23-9