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Chapter 43
Monitoring Network Traffic Using SPAN
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
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:
•
Figure 43-2
Ingress source port
•
Figure 43-3
Fibre Channel traffic
IPS Source Ports
SPAN capabilities are available on the IP Storage Services (IPS) module. The SPAN feature is only
implemented on the FCIP and iSCSI virtual Fibre Channel port interfaces, not the physical Gigabit
Ethernet ports. You can configure SPAN for ingress traffic, egress traffic, or traffic in both directions for
all eight iSCSI and 24 FCIP interfaces that are available in the IPS module.
You can configure SPAN for Ethernet traffic using Cisco switches or routers connected to the Cisco MDS
Note
9000 Family IPS modules.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Ingress source (Rx)—Traffic entering the switch fabric through this source interface is spanned or
copied to the SD port (see
SPAN Traffic from the Ingress Direction
fc3/1
Cisco MDS 9000 switch
Egress source (Tx)—Traffic exiting the switch fabric through this source interface is spanned or
copied to the SD port (see
SPAN Traffic from Egress Direction
fc3/1
Cisco MDS 9000 switch
Figure
43-2).
Fibre Channel traffic
fc1/2
Fibre Channel analyzer
fc9/1
SD port
Figure
43-3).
Egress source port
fc1/2
fc9/1
SD port
Cisco MDS 9000 Family Configuration Guide
Fibre Channel analyzer
SPAN Sources
43-3
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