Cisco WS-X6748-SFP Software Guide - Page 661

Chapter 38 Configuring SPAN and RSPAN Configuring SPAN Configuring SPAN These sections describe how to configure SPAN: • SPAN Hardware Requirements, page 38-5 • Understanding How SPAN Works, page 38-5 • SPAN Configuration Guidelines, page 38-6 • Configuring SPAN from the CLI, page 38-7 SPAN Hardware Requirements All Catalyst 6000 family switch supervisor engines support the SPAN feature. Understanding How SPAN Works SPAN selects network traffic for analysis by a network analyzer such as a SwitchProbe device or other Remote Monitoring (RMON) probe. SPAN mirrors traffic from one or more source ports on any VLAN, from one or more VLANs, or from the sc0 console interface to a destination port for analysis (see Figure 38-1). In Figure 38-1, all traffic on Ethernet port 5 (the source port) is mirrored to Ethernet port 10. A network analyzer on Ethernet port 10 receives all network traffic from Ethernet port 5 without being physically attached to it. Figure 38-1 SPAN Configuration Port 5 traffic mirrored 1 2 3 4 5 6 7 8 9 10 11 12 on port 10 E6 E7 E5 E8 E4 E9 E11 E12 E3 E10 E2 E1 Network analyzer S6884 For SPAN configuration, the source ports and the destination port must be on the same switch. SPAN does not affect the switching of network traffic on source ports; a copy of the packets received or transmitted by the source ports are sent to the destination port. 78-13315-02 Catalyst 6000 Family Software Configuration Guide-Releases 6.3 and 6.4 38-5