With Span - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Chapter 51 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 51-5
FC Analyzer usage without SPAN
This type of connection has the following limitations:
•
•
•

With SPAN

Using SPAN you can capture the same traffic scenario shown in
disruption. The Fibre Channel analyzer uses the ingress (Rx) link at port 1 to capture all the frames going
out of the interface fc1/1. It uses the ingress link at port 2 to capture all the ingress traffic on interface
fc1/1.
Using SPAN you can monitor ingress traffic on fc1/1 at SD port fc2/2 and egress traffic on SD port fc2/1.
This traffic is seamlessly captured by the FC analyzer as shown in
OL-18084-01, Cisco MDS NX-OS Release 4.x
Fibre Channel Analyzer Usage Without SPAN
Cisco
MDS 9000
switch
fc1/1
Cisco
MDS 9000
switch
RX
fc1/1
TX
It requires you to physically insert the FC analyzer between the two network devices.
It disrupts traffic when the Fibre Channel analyzer is physically connected.
The analyzer captures data only on the Rx links in both port 1 and port 2. Port 1 captures traffic
exiting interface fc1/1 and port 2 captures ingress traffic into interface fc1/1.
=TX
1 2
FC Analyzer
RX
Cisco MDS 9000 Family CLI Configuration Guide
Monitoring Traffic Using Fibre Channel Analyzers
Storage
device
Storage
device
Figure 51-5 without any traffic
Figure 51-6.
51-13