Digital Networks North America DNswitch 800 manual Using a Port Mirror for Analysis

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Using a Port Mirror for Analysis

You can mirror traffic from any source port to a target port for real-time analysis. You can then attach a logic analyzer or RMON probe to the target port and study the traffic crossing the source port in a completely unobtrusive manner. When mirroring port traffic, note that the target port must be configured in the same VLAN and be operating at the same duplex mode as the source port (see VLAN Static List on page 33).

You can use the port mirror configuration screen to designate a single port pair for mirroring as shown below:

	Figure 3-39. Mirror Port Configuration

Parameter	Description
Status	Enables/disables port mirroring.
Mirror Source Port	The port whose traffic will be monitored.
Mirror Target Port	The port that will duplicate or “mirror” all the traffic happening on
	the monitored port.

46 Configuring and Monitoring the Switch

DNswitch 800

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Contents Digital Networks Page DNswitch Web Management Guide Revision/Update InformationPage FCC Class B Certification USA Safety Compliance Underwriters Laboratories Compliance Statement Page Table of Contents Index System Requirements FeaturesDigital Networks WebView Description Conventions This guide uses the following user input conventionsSetting Up Web Management Setting an IP AddressSetting Trap Destinations Setting a Default GatewaySetting the Administrator Password Starting and Stopping Digital Networks WebView Enabling Web ManagementDigital Networks WebView User Interface Areas of the User InterfaceAreas of the User Interface Using Help Configuration OptionsConfiguring and Monitoring the Switch Screen HierarchySystem Information Parameter DescriptionSwitch Information Main BoardIP Configuration Parameter Default DescriptionSnmp Configuration Snmp CommunityTrap Managers Trap ManagersSecurity Configuration Change PasswordFirmware Upgrade Options Web Upload ManagementTftp Download Management Tftp Download ManagementConfiguration Download Management Configuration Save and RestoreConfiguration Upload Management Address Table Configuration 12. Address TableSTA Spanning Tree Algorithm Spanning Tree Information Spanning Tree14. STA Information Ports Spanning Tree Configuration Switch16. STA Configuration When the Switch Becomes Root STA Port Configuration EnabledConfiguring Bridge MIB Extensions Bridge CapabilityBridge Settings GmrpPort Priority Configuration PriorityPort Traffic Class Information 21. Port Traffic Class InformationVlan Management Vlan IDConfiguring Virtual LANs Vlan Basic InformationVlan Current Table 24. Vlan Current TableVlan Static List Vlan Static Table27. Vlan Static Table Port Assignment Vlan Static Membership by Port 28. Vlan Static Membership by PortVlan Port Configuration PvidConfiguring Igmp Igmp Multicast FilteringMulticast Router Port Information 31. Multicast Router Port InformationStatic Multicast Router Port Configuration 32. Static Multicast Router Port ConfigurationIgmp Member Port Table 33. Igmp Member Port TableIP Multicast Registration Table 34. IP Multicast Registration TablePort Menus Port InformationPort Configuration Directly to the switch when its buffers fill. BackPort Broadcast Storm Protect Configuration 37. Port Broadcast Storm Protect ConfigurationPort Security Configuration 38. Port Security ConfigurationUsing a Port Mirror for Analysis 39. Mirror Port ConfigurationPort Trunk Configuration 40. Port Trunk Configuration Port Statistics Etherlike StatisticsRmon Statistics 42. Rmon StatisticsBits but including FCS octets Configuring and Monitoring the Switch DNswitch System is Disconnected from the Switch TroubleshootingCannot Connect to the Switch How Do I Confirm a Successful Software Download? Frequently Asked QuestionsCan I Open More Than One Window for Same Switch? Index Vlan Page WM-DSA8G-00