Configuration Guide    RSPAN Configuration 
The table below presents ports that participate mirroring on the switch:   
Monitored  user  port  that copies  UDP to  the 
designated output port or the reflector port via 
local port mirroring. There are many source 
ports.   
Used for one-to-many mirroring. The packets 
from  the  mirrored  source  port  are  reflected 
through the reflector port and then outputted 
through  the  output  port.  The  reflector  port 
cannot forward traffic. It is recommended to 
set the port in down state to be reflector port 
and disable any configuration on it.   
Send mirrored packets to the middle switch or 
the destination switch.   
Send  mirrored  packets  to  the  destination 
switch. 
It  is  recommended  to  configure  two  Trunk 
ports  on  the  middle  switch  to  connect  the 
devices on both sides.   
Receive remote mirrored packets.   
Monitoring port of remote mirrored packets. 
A special VLAN, Remote VLAN is defined for remote port mirroring. The Remote 
VLAN  transmits  only  mirrored  packet  rather  than  bearing  normal  services.  All 
mirrored packets are transmitted from the source swithc through the Remote VLAN 
to the designated port of the destination switch. Hence, you can monitor the packets 
of the source switch on the destination switch.