Using Span - Cisco DS-C9216I-K9 Configuration Manual

Monitoring Traffic Using Fibre Channel Analyzers
Figure 30-5
FC Analyzer usage without SPAN
This type of connection has the following limitations:
•
•
•

Using 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
Cisco MDS 9000 Fabric Manager Switch Configuration Guide
30-8
Fibre Channel Analyzer Usage Without SPAN
Cisco
MDS 9000
switch
fc1/1
Cisco
MDS 9000
switch
fc1/1
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.
RX
=TX
1 2
FC Analyzer
TX RX
Chapter 30 Monitoring Network Traffic Using SPAN
Storage
device
Storage
device
Figure 30-5 without any traffic
Figure 30-6.
OL-7753-01