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
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Cisco MDS 9000 Family CLI Configuration Guide
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Chapter 52 Monitoring Network Traffic Using SPAN
Configuring SPAN
Suspending and Reactivating SPAN Sessions
You can temporarily deactivate (suspend) any SPAN session. The traffic monitoring is stopped during
this time.
To temporarily suspend or reactivate a SPAN session filter, follow these steps:
Encapsulating Frames
The frame encapsulation feature is disabled by default. If you enable the encapsulation feature, all
outgoing frames are encapsulated.
The
switchport encap eisl
command only applies to SD port interfaces. If encapsulation is enabled, you
see a new line (
Encapsulation is eisl
) in the
show interface
SD_port_interface
command output.
To encapsulate outgoing frames (optional), follow these steps:
SPAN Conversion Behavior
SPAN features (configured in any prior release) are converted as follows:
•
If source interfaces and source VSANs are configured in a given session, then all the source VSANs
are removed from that session.
For example, before Cisco MDS SAN-OS Release 1.0(4):
Session 1 (active)
Destination is fc1/9
No session filters configured
Ingress (rx) sources are
vsans 10-11
fc1/3,
Egress (tx) sources are
fc1/3,
Once upgraded to Cisco MDS SAN-OS Release 1.1(1):
Session 1 (active)
Destination is fc1/9
Command
Purpose
Step 1
switch#
config t
Enters configuration mode.
Step 2
switch(config)#
span session 1
switch(config-span)#
Configures the specified session (1).
Step 3
switch(config-span)#
suspend
Temporarily suspends the session.
switch(config-span)#
no suspend
Reactivates the session.
Command
Purpose
Step 1
switch#
config t
Enters configuration mode.
Step 2
switch(config)#
interface fc9/32
Configures the specified interface.
Step 3
switch(config-if)#
switchport mode SD
Configures the SD port mode for interface fc9/32.
Step 4
switch(config-if)#
switchport encap eisl
Enables the encapsulation option for this SD port.
switch(config-if)#
no
switchport encap eisl
Disables (default) the encapsulation option.