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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 .
•
Figure 43-4
Allowed list =
VSAN 2 as source
SPAN Sessions
Each SPAN session represents an association of one destination with a set of source(s) along with
various other parameters that you specify to monitor the network traffic. One destination can be used by
one or more SPAN sessions. You can configure up to 16 SPAN sessions in a switch. Each session can
have several source ports and one destination port.
To activate any SPAN session, at least one source and the SD port must be up and functioning. Otherwise,
traffic is not directed to the SD port.
A source can be shared by two sessions, however, each session must be in a different direction—one
Tip
ingress and one egress.
You can temporarily deactivate (suspend) any SPAN session. The traffic monitoring is stopped during
this time.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Interfaces are only included as sources when the port VSAN matches the source VSAN.
displays a configuration using VSAN 2 as a source:
All ports in the switch are in VSAN 1 except fc1/1.
–
Interface fc1/1 is the TE port with port VSAN 2. VSANs 1, 2, and 3 are configured in the
–
allowed list.
VSAN 1 and VSAN 2 are configured as SPAN sources.
–
VSAN As a Source
VSAN
1,VSAN 2
VSAN 1
VSAN 2
fc1/1
For this configuration, the following apply:
VSAN 2 as a source includes only the TE port fc1/1 that has port VSAN 2.
–
VSAN 1 as a source does not include the TE port fc1/1 as the port VSAN does not match VSAN
–
1.
See the
"Configuring an Allowed-Active List of VSANs" section on page 12-5
Membership" section on page
and
VSAN 3
Cisco MDS 9000 switch
SD port
16-6.
Cisco MDS 9000 Family Configuration Guide
TE port
Fibre Channel
traffic
VSAN 1,
VSAN 3
fc2/1
VSAN 2
fc9/1
SPAN Sessions
Figure 43-4
or the
"VSAN
43-5
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