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We found this command on enterprise switches tha allow you to send an aseptic copy of the traffic passing on a switch port. You can receive this “debug copy” on a passive port or remotely to a network analyzer

A network administrator configures the port mirror in many situations, including:

  • Troubleshooting network issues
  • Passive network probing
  • Intrusion detection system
  • MPLS tuning
# Huawei

observe-port 1 interface GigabitEthernet 0/0/1
interface GigabitEthernet0/0/1
 description to SERVER-LX
 port link-type access
 port default vlan 9
 port-mirroring to observe-port 1 inbound
 port-mirroring to observe-port 1 outbound

# Cisco

monitor session 1 source interface fastethernet 0/10 both
monitor session 1 destination interface fastethernet 0/30

# Mikrotik

/interface ethernet switch
set switch1 mirror-source=ether4 mirror-target=ether5


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