3Com S7906E - Switch, Configuration Manual

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Layer 3 Remote Port Mirroring Configuration Example
Network requirements
On the network shown in Figure 1-6 :
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Device A connects to the marketing department through GigabitEthernet 2/0/1, and to
GigabitEthernet 2/0/1 of Device B through GigabitEthernet 2/0/2; Device C connects to the server
through GigabitEthernet 2/0/2, and to GigabitEthernet 2/0/2 of Device B through GigabitEthernet
2/0/1.
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Configure Layer 3 remote port mirroring to enable the server to monitor the bidirectional traffic of
the marketing department through a GRE tunnel.
Figure 1-6 Network diagram for Layer 3 remote port mirroring configuration
Configuration procedure
1) Configure IP addresses for the tunnel interfaces and related ports on the devices.
Configure IP addresses and subnet masks for related ports and the tunnel interfaces according to the
configurations shown in Figure 1-6 .
2) Configure Device A (the source device)
# Create tunnel interface Tunnel 0, and configure an IP address and subnet mask for it.
<DeviceA> system-view
[DeviceA] interface tunnel 0
[DeviceA-Tunnel0] ip address 50.1.1.1 24
# Configure Tunnel 0 to operate in GRE mode, and configure source and destination IP addresses for
it.
[DeviceA-Tunnel0] tunnel-protocol gre
[DeviceA-Tunnel0] source 20.1.1.1
[DeviceA-Tunnel0] destination 30.1.1.2
[DeviceA-Tunnel0] quit
# Create and configure service loopback group 1 and specify its service type as tunnel.
[DeviceA] service-loopback group 1 type tunnel
# Assign a port (GigabitEthernet 2/0/3 for example) of the device to service loopback group 1.
[DeviceA] interface GigabitEthernet 2/0/3
[DeviceA-GigabitEthernet2/0/3] undo stp enable