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Cisco Content Services Switch Routing and Bridging Configuration Guide
OL-8241-02
Chapter 1 Configuring Interfaces and Circuits
Configuring the Switched Port Analyzer Feature
Note If the combined traffic bandwidth of the ingress and egress traffic of
the SSPAN port exceeds the bandwidth of the DSPAN port, the
DSPAN port may become oversubscribed.
• copyTxOnly - CSS copies to the DSPAN port only those packets that the
SSPAN port transmits to the network (egress traffic).
• copyRxOnly - CSS copies to the DSPAN port only those packets that the
SSPAN port receives from the network (ingress traffic).
For example, to copy all received and transmitted packets on SSPAN port 3 of the
I/O module in slot 3 to DSPAN port 12 on the same module, enter:
(config)# setspan src_port 3/3 dest_port 3/12 copyBoth
To return the SPAN feature to its default state of disabled, use the no setspan
command. For example, to disable SPAN on the source and destination ports on
CSS module 3 in the example above, enter:
(config)# no setspan src_port 3/3 dest_port 3/12
Verifying the SPAN Configuration on a CSS
To verify the SPAN configuration on a CSS, use the show setspan command.
Table 1-15 describes the fields in the show setspan command output.
Table 1-15 Field Descriptions for the show setspan Command
Field Description
SPAN Configuration
Source Number of the SSPAN port whose traffic you want
to monitor.
Destination Number of the DSPAN port to which the CSS
copies the packets flowing through the SSPAN port.
Connect the network analyzer or RMON probe to
this port.