Huawei Quidway S3900 Series Operation Manual page 706

Operation Manual – Mirroring
Quidway S3900 Series Ethernet Switches
Source Source
Switch Switch
Source Port Source Port
Figure 1-2 RSPAN application
There are three types of switches with the RSPAN enabled.
Source switch: The switch to which the monitored port belongs. Through Layer 2
forwarding, it sends traffics to be mirrored to an
switch over the
Intermediate switch: Switches between the source switch and destination switch
on the network. An intermediate switch forwards mirrored flows to the next
intermediate switch or the destination switch. Circumstances can occur where no
intermediate switch is present, if a direct connection exists between the source
and destination switches.
Destination switch: The switch to which the destination port for remote mirroring
belongs. It forwards mirrored flows it received from the remote-probe VLAN to the
monitoring device through the destination port.
Table 1-1 describes how the ports on various switches are involved in the mirroring
operation.
Table 1-1 Ports involved in the mirroring operation
Switch
Source
switch
Intermediate
switch
Remote-probe VLAN Remote-probe VLAN
Intermediate Switch Intermediate Switch
Reflector port Reflector port
remote-probe VLAN
Ports involved
Source port
Reflector port
Trunk port
Trunk port
Huawei Technologies Proprietary
Chapter 1 Mirroring Configuration
Trunk port Trunk port
intermediate switch or destination
.
Function
Port to be mirrored; copy user data packets to the
specified reflector
mirroring. There can be more than one source
port.
Receive user data packets that are mirrored on a
local port.
Send mirrored packets to the intermediate switch
or the destination switch.
Send mirrored packets to the destination switch.
Two Trunk ports
intermediate switch to be connected to devices
that are connected to the source switch and the
destination switch.
1-2
Destination Destination
Switch Switch
Destination port Destination port
port through local port
are necessary for the