3Com 4200G 12-Port Configuration Manual page 252

238 C 28: C
HAPTER ONFIGURATION FOR
M F
IRRORING EATURES
Intermediate switch: the switch between the source and the destination switch on
■
the network.
Destination switch: the switch to which the destination port for remote mirroring
■
belongs.
Table 206 describes how the ports on various switches are involved in the mirroring
operation.
Table 206 Ports involved in the mirroring operation
Switch Ports involved
Source switch Source port
Reflector port
Trunk port
Intermediate Trunk port
switch
Destination switch Trunk port
Destination port
To implement remote port management, you need to define a special VLAN, called
Remote-probe VLAN, on all the three types of switches. All mirrored packets will be
transferred to the mirrored ports of the destination switch from the source switch
using this VLAN. Thus, the destination switch can monitor the port packets sent from
the remote ports of the source switch. Remote-probe VLAN has the following
features:
The ports connecting the devices and in remote-probe VLAN must be of trunk
■
type.
The default VLAN, management VLAN, and super VLAN cannot be configured as
■
remote-probe VLAN.
CAUTION: You are not recommended to perform any of the following operations on
the remote-probe VLAN:
Configuring a source port to the remote-probe VLAN that is used by the local
mirroring group
Configuring a Layer 3 interface
Running other protocol packets, or bearing other service packets;
Using remote-probe VLAN as a special type of VLAN, such as sub VLAN, voice VLAN
or protocol VLAN
Function
Port to be mirrored; copy user data packets to the
specified reflector port through local port
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 are necessary for the intermediate
switch to be connected to devices that are
connected to the source switch and the destination
switch.
Receive remote mirrored packets.
Monitor remote mirrored packets