Allied Telesis AT-GS950/8 manual Port Mirroring Overview

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Chapter 5: Port Mirroring

Port Mirroring Overview

The port mirroring feature allows you to unobtrusively monitor the ingress and egress traffic on a port on the switch by having the traffic copied to another switch port. By connecting a network analyzer to the port where the traffic is being copied to, you can monitor the traffic on the other port without impacting its performance or speed.

The port whose traffic you want to mirror is called the mirrored port. The port where the traffic will be copied to is called the mirroring or target port.

Observe the following guidelines when using this feature:

You can configure only one target port at a time.

The mirrored and mirroring ports must be on the same switch.

This feature copies both the ingress and egress traffic of the mirrored port.

The mirroring port (target port) cannot be used for normal Ethernet switching and cannot be part of a trunk.

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Contents Management Software Page Contents Contents Figures Figures Preface Where to Find Web-based Guides Management Software Updates Contacting Allied TelesisPreface Getting Started ChapterStarting a Management Session Main Save Configuration Click Apply Saving ChangesQuitting a Management Session Getting Started Basic Switch Parameters Basic Switch Parameters AT-S82 Management Software User’s Guide Disabling or Enabling Ping Blocking EnabledDisabled Enabling or Disabling 802.1X Forwarding Control Changing the Administrator’s Password Rebooting the Switch Resetting the Switch and Retaining the IP Address Reset Click Apply Switch is resetAT-S82 Management Software User’s Guide Downloading New Firmware Download Status MessagePort Configuration Configuring Port Parameters Port is enabled. This is the default Copper FiberTrunking Trunking Overview Trunking Guidelines Trunking AlgorithmAT-S82 Management Software User’s Guide Configuring the Trunking Algorithm DAxorSASetting up the Trunk Port Trunking ConfigurationTrunking Port Mirroring Port Mirroring Overview Configuring Port Mirroring Port Mirroring VLANs Vlan Features Increased Performance Improved Manageability SecurityAT-S82 Management Software User’s Guide Vlan Overview Vlan Identifier Vlan Port MembersIncoming Outgoing Tagged Untagged Frames Guidelines for Creating a Vlan Working with VLANs Vlan DetailDisplaying all VLANs Click Show All Static Vlan EntriesVlan Protected Ports Vlan Protected Ports Vlan ExampleAT-S82 Management Software User’s Guide VLANs Class of Service Class of Service Overview Mapping Ports to Egress QueuesIeee 802.1p Priority Level Port Priority Queue Port Egress Queue Maximum Number Packets Mapping Priorities to Queues Setting Up the Schedule Assigning Priority to Ports Class of Service Spanning Tree Protocol STP Spanning Tree Overview Bridge Priority RootPath Costs and Port Costs Increment Bridge PriorityPort Speed Port Cost Port Priority Increment Port PriorityHello Time and Bridge Protocol Data Units BPDUs Point-to-Point and Edge Ports Edge Port Spanning Tree and VLANs Spanning Tree Protocol STP Configuring Spanning Tree Rstp STP CompatibleDisabled Configuring STP Port Settings True YesFalse AutoSpanning Tree Protocol STP

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