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 .
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Configuring SPAN
To monitor network traffic using SD ports, follow these steps:
Configure the SD port.
Step 1
Attach the SD port to a specific SPAN session.
Step 2
Monitor network traffic by adding source interfaces to the session.
Step 3
To configure an SD port for SPAN monitoring, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# interface fc9/1
Step 3
switch(config-if)# switchport mode SD
Step 4
switch(config-if)# switchport speed 1000
Step 5
switch(config-if)# no shutdown
To configure a SPAN session, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# span session 1
switch(config-span)#
switch(config)# no span session 1
Step 3
switch(config-span)# destination interface fc9/1
switch(config-span)# no destination interface
fc9/1
Step 4
switch(config-span)# source interface fc7/1
switch(config-span)# no source interface fc7/1
OL-6973-03, Cisco MDS SAN-OS Release 2.x
In a 32-port switching module, you must configure the same session in all four ports in one port
group (unit). If you wish, you can also configure only two or three ports in this unit (see the
Configuration Guidelines" section on page
SPAN frames are dropped if the sum of the bandwidth of the sources exceeds the speed of the
destination port.
Frames dropped by a source port are not spanned.
11-8).
Purpose
Enters configuration mode.
Configures the specified interface.
Configures the SD port mode for interface fc2/1.
Configures the SD port speed to 1000 Mbps.
Enables traffic flow through this interface.
Purpose
Enters configuration mode.
Configures the specified SPAN session (1).
If the session does not exist, it is created.
Deletes the specified SPAN session (1).
Configures the specified destination
interface (fc 9/1) in a session.
Removes the specified destination interface
(fc 9/1).
Configures the source (fc7/1) interface in
both directions.
Removes the specified destination interface
(fc 7/1) from this session.
Cisco MDS 9000 Family Configuration Guide
Configuring SPAN
"32-Port
43-7
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