Advantages To Using Rspan; Fc And Rspan Tunnels - Cisco DS-C9216I-K9 Configuration Manual

Chapter 30 Monitoring Network Traffic Using SPAN
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Figure 30-8
VSAN 2

Advantages to Using RSPAN

The RSPAN features has the following advantages:
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FC and RSPAN Tunnels

A FC tunnel is a logical data path between a source switch and a destination switch. The FC tunnel
originates from the source switch and terminates at the remotely located destination switch.
RSPAN uses a special Fibre Channel tunnel (FC tunnel) that originates at the ST port in the source switch
and terminates at the SD port in the destination switch. You must bind the FC tunnel to a ST port in the
source switch and map the same FC tunnel to a SD port in the destination switch. Once the mapping and
binding is configured, the FC tunnel is referred to as a RSPAN tunnel.
OL-7753-01
SD ports—A passive port from which remote SPAN traffic can be obtained by the FC analyzer.
ST ports—A SPAN tunnel (ST) port is an entry point port in the source switch for the RSPAN Fibre
Channel tunnel. ST ports are special RSPAN ports and cannot be used for normal Fibre Channel
traffic.
RSPAN Transmission
Cisco MDS 9000 switch
Source swtich
ST port
Enables nondisruptive traffic monitoring at a remote location.
Provides a cost-effective solution by using one SD port to monitor remote traffic on multiple
switches.
Works with any Fibre Channel analyzer.
Compatible with the Cisco MDS 9000 Port Analyzer adapters.
Does not affect traffic in the source switch, but shares the ISL bandwidth with other ports in the
fabric.
RSPAN
encapsulated
frame
TE port
Cisco
MDS 9000
Fibre
Channel
fabric
trunking
enabled
on each
switch
Cisco MDS 9000 Fabric Manager Switch Configuration Guide
Remote SPAN
Cisco MDS 9000 switch
Destination swtich
VSAN 2
SD port
FC analyzer
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