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Chapter 22 Port Mirror Commands
Port Mirror refers to the process of forwarding copies of packets from one port to a mirroring port.
Usually, the mirroring port is connected to data diagnose device, which is used to analyze the
mirrored packets for monitoring and troubleshooting the network.
mirror add
Description
The mirror add command is used to enable Port Mirror function.
Syntax
mirror add [mirrored port] [mirroring port] { none | ingress | egress | both }
[group-num]
Parameter
mirrored port —— The port to be monitored.
mirroring port —— The mirroring port.
none —— Remove the mirrored port from the current mirror group.
ingress —— Ingress monitoring. Select this option, the incoming packets
received by the mirrored port will be copied to the mirroring port.
egress —— Egress monitoring. Select this option, the outgoing packets sent
by the mirrored port will be copied to the mirroring port.
both
——
Ingress and Egress monitoring. Select this option, the incoming
packets received and the outgoing packets sent by the mirrored port will both be
copied to the mirroring port.
group-num
——
The group number of mirrior group.
Command Mode
Global Configuration Mode
Example
Configure port 3 as mirrored port, port 4 as mirroring port, the mirror mode as
both and group number as 1 :
TP-LINK(config)# mirror add 3 4 both 1
User Guidelines
1. The mirroring port is corresponding to current interface configuration mode.
2. Mirrored ports number is not limited, but it can’t be the mirroring port at the