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
The RSPAN tunnel begins in the source switch and terminates in the destination switch. This section
assumes Switch S to be the source and Switch D to be the destination.
Besides the source and destination switches, the VSAN must also be configured in each Cisco MDS
switch in the Fibre Channel fabric, if they exist.
To monitor network traffic using the RSPAN feature, follow these steps:
Create VSAN interfaces in destination switch (Switch D) and source switch (Switch S) to facilitate the
Fibre Channel tunnel (FC tunnel) creation.
Enable the FC tunnel in each switch in the end-to-end path of the tunnel.
Initiate the FC tunnel (in Switch S) and map the tunnel to the VSAN interface's IP address (in Switch
D) so all RSPAN traffic from the tunnel is directed to the SD port.
Configure SD ports for SPAN monitoring in the destination switch (Switch D).
Configure the ST port in the source switch (Switch S) and bind the ST port to the FC tunnel.
Create an RSPAN session in the source switch (in Switch S) to monitor network traffic.
RSPAN Configuration Example
This section provides a RSPAN configuration example using the procedure defined in the previous
Configuration in the Source Switch
This section identifies the tasks that must be performed in the source switch (Switch S):
Cisco MDS 9000 Family CLI Configuration Guide
ST ports cannot be used for any purpose other than to carry RSPAN traffic.
ST ports cannot be configured using Storage Services Modules (SSMs).
Creating VSAN Interfaces, page 52-21
Enabling FC Tunnels, page 52-21
Initiating the FC Tunnel, page 52-22
Configuring the ST Port, page 52-22
Configuring an RSPAN Session, page 52-23
Configuring VSAN Interfaces, page 52-23
Enabling FC Tunnels, page 52-24
Enabling IP Routing, page 52-24
Configuring VSAN Interfaces, page 52-24
Enabling FC Tunnels, page 52-25
Monitoring Network Traffic Using SPAN
OL-16184-01, Cisco MDS SAN-OS Release 3.x