Monitoring Rspan Traffic - Cisco DS-C9216I-K9 Configuration Manual

Remote SPAN
This option is especially useful if you prefer to direct the traffic through a certain path although other
paths available. In a RSPAN situation, you can specify the explicit-path so the RSPAN traffic does not
interfere with the existing user traffic. You can create any number of explicit paths in a switch.
Figure 30-14
10.10.10.1
The explicit path must be created in the source switch. To configure an explicit path, you must first create
the path and then configure the use of any one path. If an explicit path is not configured, the minimum
cost path is used by default. If an explicit path is configured and is functioning, the specified path is used.
This configuration explicitly specifies Path 1 to be used for the RSPAN traffic. Refer to RFC 3209 for
further details on explicit paths and source based routing.

Monitoring RSPAN Traffic

Once the session is configured, other SPAN sources for this session can also be configured as required.
shows a RSPAN setup where one session with destination port fc2/1 and source interface fc1/1 is used
to capture traffic in both ingress and egress direction.
Figure 30-15
TX
RX
To use this setup, the analyzer should have the capability of distinguishing ingress and egress traffic for
all captured frames.
Cisco MDS 9000 Fabric Manager Switch Configuration Guide
30-16
Explicit Path Configuration
Path 1
10.10.10.2
Cisco MDS
Fibre Channel
Fabric
10.10.10.5
Fibre Channel Analyzer Using a Single SD Port to Monitor RSPAN Traffic
Source switch
Cisco MDS
9000 switch
fc1/1
ST port
Chapter 30
10.10.10.3
10.10.10.4
Path 2 (minimum cost)
Fibre Channel
TE port
fabric
Monitoring Network Traffic Using SPAN
destination switch
Cisco MDS
9000 switch
SD port
fc2/1
FC analyzer
OL-7753-01