SPAN Window
This window appears when you choose Port > SPAN on the menu bar.
You can also click here to launch
it.
Begin by using the Host Name list to select a device whose ports you
want to monitor. If you select a Catalyst 2950 or 3550 switch, the window displays
a table for defining monitoring sessions. The table has one tab for Catalyst
2950 switches, two for Catalyst 3550 switches. If you select a different type
of Catalyst switch, the window displays a table of monitor ports and the ports
they monitor.
Follow the steps in one of the following sections, according to the type of
switch you selected.
Catalyst 2950 or 3550 Switches
- Click the Session 1 tab.
- In the Ingress column of the Ingress Source (Monitored) Interfaces
table, check the boxes of the interfaces or VLANs whose outgoing packets
you want to monitor.
You can select multiple interfaces, multiple VLANs, both, or all the ingress
sources.
- From the Egress Source (Monitored) Interface list, select an egress
source interface.
- From the Destination (Monitoring) Interface list, select a destination
interface. See Monitoring Interfaces for the requirements
for a monitoring interface.
- From the Destination Encapsulation list, select an encapsulation
type for the destination port.
Restriction: This option is not available to Catalyst 2950 switches.
- Optional for Catalyst 3550 switches: If you checked a trunk port
in the table or selected a trunk port from the Egress Source (Monitored)
Interface list, you can limit monitoring to certain VLANs by specifying
the VLAN IDs in the VLAN Filter field. Separate VLAN IDs with a comma,
and use a hyphen to indicate consecutive IDs. For example: 1,3-5
- Optional for Catalyst 3550 switches: Click the Session 2 tab
and define a second session.
If you define two sessions, the destination ports must be different ports.
Neither can be a source port in the other session.
- Click OK to close the SPAN window.
Other Catalyst Switches
- Select a port that will be the monitor port.
- Click Modify to display the Modify Monitored Ports window.
- Complete the window.
- Click OK to put your changes in effect and to close the
window.
- Click OK to close the SPAN window.