Advantages To Using Rspan; Fc And Rspan Tunnels - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Remote 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 51-8
VSAN 2

Advantages to Using RSPAN

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

An 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 an ST port in the
source switch and map the same FC tunnel to an SD port in the destination switch. Once the mapping
and binding is configured, the FC tunnel is referred to as an RSPAN tunnel (see
Cisco MDS 9000 Family CLI Configuration Guide
51-18
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.
Is 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.
Chapter 51
RSPAN
encapsulated
frame
TE port
Cisco
MDS 9000
Fibre
Channel
fabric
trunking
enabled
on each
switch
OL-18084-01, Cisco MDS NX-OS Release 4.x
Monitoring Network Traffic Using SPAN
Cisco MDS 9000 switch
Destination swtich
VSAN 2
SD port
FC analyzer
Figure 51-9).