Single Sd Port To Monitor Traffic; Displaying Span Information - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

Chapter 52 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

Single SD Port to Monitor Traffic

You do not need to use two SD ports to monitor bidirectional traffic on any interface as shown in
Figure
the same SD port fc2/1.
Figure 52-7
is used to capture traffic in both ingress and egress directions. This setup is more advantageous and cost
effective than the setup shown in
of using a full, two-port analyzer.
Figure 52-7
SD Port
fc2/1
To use this setup, the analyzer should have the capability of distinguishing ingress and egress traffic for
all captured frames.
To configure SPAN on a single SD port, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# span session 1
switch(config-span)#
Step 3
switch(config-span)## destination interface fc2/1
Step 4
switch(config-span)# source interface fc1/1

Displaying SPAN Information

Use the show span command to display configured SPAN information. See Examples
Example 52-4 Displays SPAN Sessions in a Brief Format
switch# show span session brief
OL-16184-01, Cisco MDS SAN-OS Release 3.x
52-6. You can use one SD port and one FC analyzer port by monitoring traffic on the interface at
shows a SPAN setup where one session with destination port fc2/1 and source interface fc1/1
Figure
Fibre Channel Analyzer Using a Single SD Port
Bidirectional source in session 1 - SD port fc2/1
Cisco
MDS 9000
switch
fc1/1
TX
Dropped*
TX
TX
1
FC Analyzer
52-6—it uses one SD port and one port on the analyzer, instead
TX
RX
* The egress (TX) traffic coming out from
the analyzer ports will be dropped.
Purpose
Enters configuration mode.
Creates the SPAN session 1.
Configures the destination interface fc2/1.
Configures the source interface fc1/1 on the
same SD port.
Cisco MDS 9000 Family CLI Configuration Guide
Displaying SPAN Information
Storage
device
52-4 to 52-9.
52-15