Got it

Basic Concepts of Mirroring

Latest reply: May 16, 2019 17:49:37 221 1 0 0

Mirrored Ports and Observing Ports

Mirrored and observing ports have the following functions:

  • Mirrored ports are monitored ports. All the packets that pass through mirrored ports are copied and sent to observing ports.

  • Observing ports are connected to monitoring devices and send packets copied from mirrored ports to those monitoring devices.

An observing port is dedicated to forwarding mirrored traffic. Therefore, do not configure other services on an observing port; otherwise, mirrored traffic and other service traffic interfere with each other.

If the mirroring function is deployed on many ports of a device, a large amount of internal forwarding bandwidth will be occupied, which affects the forwarding of other services. Additionally, if the mirrored port bandwidth is higher than the observing port bandwidth, for example, 1000 Mbit/s on a mirrored port and 100 Mbit/s on an observing port, the observing port will fail to forward all mirrored packets in time because of insufficient bandwidth, leading to packet loss.

Mirroring Directions

Mirroring directions define whether the packets to be copied to observing ports are those entering or leaving (or both) mirrored ports:

  • Inbound

    The switch copies packets received by mirrored ports and sends them to observing ports.

  • Outbound

    The switch copies packets sent from mirrored ports and sends them to observing ports.

  • Bidirectional

    The switch copies packets received and sent by mirrored ports and sends them to observing ports.

  • x
  • convention:

Created May 16, 2019 17:49:37 Helpful(0) Helpful(0)

Only one thing:

You can configure another services on an observer port, the only thing you need to do is to separate de mirrored traffic, with a simple vlan tag.
View more
  • x
  • convention:


You need to log in to comment to the post Login | Register

Notice: To protect the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but are not limited to the following:
  • Politically sensitive content
  • Content concerning pornography, gambling, and drug abuse
  • Content that may disclose or infringe upon others ' commercial secrets, intellectual properties, including trade marks, copyrights, and patents, and personal privacy
Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see " Privacy."

My Followers

Login and enjoy all the member benefits


Huawei Enterprise Support Community
Huawei Enterprise Support Community
Are you sure to block this user?
Users on your blacklist cannot comment on your post,cannot mention you, cannot send you private messages.
Please bind your phone number to obtain invitation bonus.