Example for Configuring Local N:1 Port Mirroring

Networking Requirements

In Figure 1, three departments (science and technology departments 1 and 2 and administrative department) of a company access the Internet through the switch. The monitoring device (Server) is directly connected to the switch.

Internet-bound traffic from the three departments needs to be monitored by the server.

Figure 1 Local N:1 port mirroring networking

Configuration Roadmap

The configuration roadmap is as follows:

Configure GE0/0/4 of the Switch as a local observing port to forward mirrored packets to the Server.
Configure GE0/0/1 through GE0/0/3 of the Switch as mirrored ports to copy Internet-bound traffic from the three departments and send the traffic to the local observing port.

Procedure

Configure an observing port.

# Configure GE0/0/4 of the Switch as a local observing port.

<HUAWEI> system-view
[HUAWEI] sysname Switch
[Switch] observe-port 1 interface gigabitethernet 0/0/4

# Disable the observing port from forwarding data packets.

[Switch] observe-port 1 forwarding disable

Configure mirrored ports.

# Configure GE0/0/1 through GE0/0/3 of the Switch as mirrored ports to copy the packets received by the mirrored ports and send them to the local observing port.

[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] port-mirroring to observe-port 1 inbound
[Switch-GigabitEthernet0/0/1] quit
[Switch] interface gigabitethernet 0/0/2
[Switch-GigabitEthernet0/0/2] port-mirroring to observe-port 1 inbound
[Switch-GigabitEthernet0/0/2] quit
[Switch] interface gigabitethernet 0/0/3
[Switch-GigabitEthernet0/0/3] port-mirroring to observe-port 1 inbound
[Switch-GigabitEthernet0/0/3] return

Verify the configuration.

# Check the observing port configuration.

<Switch> display observe-port
  ----------------------------------------------------------------------
  Index          : 1
  Untag-packet   : No
  Forwarding     : No
  Interface      : GigabitEthernet0/0/4
  ----------------------------------------------------------------------

# Check the mirrored port configuration.

<Switch> display port-mirroring
  ----------------------------------------------------------------------
  Observe-port 1 : GigabitEthernet0/0/4
  ----------------------------------------------------------------------
  Port-mirror:
  ----------------------------------------------------------------------
       Mirror-port               Direction  Observe-port
  ----------------------------------------------------------------------
  1    GigabitEthernet0/0/1      Inbound    Observe-port 1
  2    GigabitEthernet0/0/2      Inbound    Observe-port 1
  3    GigabitEthernet0/0/3      Inbound    Observe-port 1
  ----------------------------------------------------------------------