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60-2
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 60 Monitoring Network Traffic Using SPAN
SPAN Sources
Figure 60-1 SPAN Transmission
SPAN Sources
SPAN sources refer to the interfaces from which traffic can be monitored. You can also specify VSAN
as a SPAN source, in which case, all supported interfaces in the specified VSAN are included as SPAN
sources. You can choose the SPAN traffic in the ingress direction, the egress direction, or both directions
for any source interface:
• Ingress source (Rx)—Traffic entering the switch fabric through this source interface is spanned or
copied to the SD port (see
Figure 60-2).
Figure 60-2 SPAN Traffic from the Ingress Direction
• Egress source (Tx)—Traffic exiting the switch fabric through this source interface is spanned or
copied to the SD port (see
Figure 60-3).
Fibre Channel traffic
Fibre Channel traffic
Fibre Channel analyzer
fc9/1
fc3/1
fc1/2
SPAN source port
SD port
Cisco MDS 9000 switch
85478
Fibre Channel traffic
Fibre Channel analyzer
fc9/1
fc3/1
fc1/2
Ingress source port
SD port
Cisco MDS 9000 switch
85479
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