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
52-6
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
•
The SD port does not have a port VSAN.
•
SD ports cannot be configured using Storage Services Modules (SSMs).
•
The port mode cannot be changed if it is being used for a SPAN session.
Note
If you need to change an SD port mode to another port mode, first remove the SD port from all sessions
and then change the port mode using the
switchport mode
command.
Guidelines to Configure SPAN
The following guidelines apply for SPAN configurations:
•
You can configure up to 16 SPAN sessions with multiple ingress (Rx) sources.
•
You can configure a maximum of three SPAN sessions with one egress (Tx) port.
•
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
“32-Port
Switching Module Configuration Guidelines” section on page 12-2
).
•
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.
Configuring SPAN
To monitor network traffic using SD ports, follow these steps:
Step 1
Configure the SD port.
Step 2
Attach the SD port to a specific SPAN session.
Step 3
Monitor network traffic by adding source interfaces to the session.
Configuring SPAN
To configure an SD port for SPAN monitoring, follow these steps:
Command
Purpose
Step 1
switch#
config t
Enters configuration mode.
Step 2
switch(config)#
interface fc9/1
Configures the specified interface.
Step 3
switch(config-if)#
switchport mode SD
Configures the SD port mode for interface fc9/1.
Step 4
switch(config-if)#
switchport speed 1000
Configures the SD port speed to 1000 Mbps.
Step 5
switch(config-if)#
no
shutdown
Enables traffic flow through this interface.