Cabletron Systems EMM-E6 manual What is a Link Trap?, Enabling and Disabling Link/Seg Traps

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Link/Seg Traps

NOTE

Unterminated BNC (thin coax) ports appear in the Hub View as segmented ports. When you attach a thin coax cable or a 50 Ω terminator to a port, the repeater generates a portUnsegmenting trap; when you remove the cable or terminator, the repeater generates a portSegmenting trap. Note also that devices at both ends of the cable will generate the portUnsegmenting and portSegmenting traps, even if only one end of the cable has been disconnected.

What is a Link Trap?

Some Cabletron Ethernet repeater ports — including RJ45 twisted pair and fiber optic ports — generate a link signal to monitor the status of their connection with the device at the other end of the cable segment. If the cable is removed or broken, the port’s link status goes to “No Link” and the repeater generates a portLinkDown trap. When a port in a “No Link” condition receives a link signal, the port goes to a “Link” condition and the repeater generates a portLinkUp trap. Note that devices at both ends of the disconnected or broken cable will generate the portLinkDown and portLinkUp traps, even when only one end of the cable has been removed.

NOTE

BNC (thin coax), AUI, and transceiver ports do not support a link signal. As described above, BNC ports respond to changes in link status by generating portSegmenting and portUnsegmenting traps; AUI and transceiver ports do not respond at all to changes in link status (unless the port has been segmented due to excessive collisions), and will always display as on, even if no cable is connected.

Enabling and Disabling Link/Seg Traps

Although each Cabletron device comes with a number of traps built in to the firmware, no device will generate these traps unless it is configured to do so. This can be accomplished via Local Management (by enabling traps and entering your workstation’s IP address in the Community Names screen), or via the SPMA Trap Table utility, accessible from the icon menu or from the command line. Once traps as a whole have been enabled, you can use the Link/Seg Traps feature to selectively enable and disable link and segmentation traps as required by your network management needs.

To open the Repeater Link/Seg Traps window

from the icon:

1.Click on the appropriate EMM-E6 icon to display the icon menu.

2.Drag down to Link/Seg Traps and release.

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What is a Link Trap?

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Contents EMM-E6 Page Virus Disclaimer Restricted Rights Notice Contents Chapter Source Addressing Chapter SecurityChapter Front Panel Redundancy Appendix a EMM-E6 MIB StructureContents Using the EMM-E6 User’s Guide IntroductionUsing the EMM-E6 User’s Guide What’s not in the EMM-E6 User’s Guide UPSConventions Screen Displays Window ConventionsUsing the Mouse ButtonGetting Help EMM-E6 Firmware Year 2000 ComplianceUsing the EMM-E6 Hub View Using the Hub ViewNavigating Through the Hub View Hub View Front PanelDevice Name UptimeDate and Time Device LocationUsing the EMM-E6 Hub View EMM-E6 Ports Display Using the Mouse in a Hub View Module Brim PortsHub View Port Color Codes Port Display FormMonitoring Hub Performance Port Display Form Traffic ErrorsLoad CollisionsPort Type ProtocolsFrame Sizes Using the EMM-E6 Hub View Contact Checking Device Status and Updating Front Panel InfoName and Location Checking Network Status Chassis TypeName Active UsersChecking Module Status Module TypeChecking Port Status Link StatusStatus Media TypeViewing the IP Address Table Topology TypeLaunching the Global Find MAC Address Tool Checking StatisticsUsing the EMM-E6 Hub View Avg Packet Size Received BytesTotal Packets Broadcast PacketsCRC Errors Total ErrorsAlignment Errors OOW CollisionsRunt Frames Giant FramesViewing the Port Source Address List Protocols/Frames StatisticsUsing the EMM-E6 Hub View Setting the Polling Intervals Managing the HubContact Status Device General StatusPort Operational State Configuring FNB ConnectionsDevice Configuration StatisticsConfiguring RIC MIM Connections To configure FNB connectivity for an individual port Setting a Port’s Trunk Type 15. Tpxmim Channel Selection WindowTo change a port’s topology status Enabling/Disabling MIM Ports Alarm Configuration From the icon Using Alarm ConfigurationFrom the command line stand-alone mode From the Hub ViewConfiguring Alarms CRCSetting Repeater Alarms BroadcastSetting and Changing Alarms Set Repeater Alarms WindowSetting Module and Port Alarms Setting Module AlarmsSet Module Alarms Window Set the Status to EnabledSetting Port Alarms Set Port Alarms WindowSet the Status to Enabled Alarm Configuration Setting Module and Port Alarms What is a Segmentation Trap? Link/Seg TrapsWhat is a Link Trap? Enabling and Disabling Link/Seg TrapsSpmarun r4hwtr IP address community name Configuring Link/Seg Traps for the Repeater Viewing and Configuring Link/Seg Traps for Hub ModulesModule Traps Window Viewing and Configuring Link/Seg Traps for Ports Port Traps WindowLink/Seg Traps Link/Seg Traps Enabling and Disabling Link/Seg Traps Setting Network Circuit Redundancy Repeater RedundancyConfiguring a Redundant Circuit Spmarun r4red IP address community nameChannel X Redundancy Window Add Circuit Address Window Repeater Redundancy Monitoring Redundancy To set the Poll IntervalSource Addressing Displaying the Source Address ListDisplaying the Source Address List Source Addressing Setting the Hash Type Setting the Aging TimeLocking Source Addresses Source Address Locking on Older Devices Configuring Source Address Traps Repeater-level Traps Module- and Port-level Traps Source Addressing Finding a Source Address Port Source Address Traps WindowClick on to exit the window Security What is LANVIEWSECURE? Spmarun r4sec IP address SU community nameTrunk port security New definitions for station and trunk portsSecure address assignment Configurable violation response Newest Lanviewsecure FeaturesContinuous learning mode Full or partial security against eavesdroppingForced non-secure status Learned addresses resetSecurity on Non-LANVIEWSECUREMIMs Configuring Security Security To assign secure addresses to a port Addresses Window Boards with Multiple Caches Add MAC Address WindowResetting Learned Addresses Tips for Successfully Implementing Eavesdropper ProtectionEnabling Security and Traps Security Repeater-level Security and Traps Channel X Security WindowModule-level Security and Traps Channel X Module Security Window Port-level Security and Traps Channel X Port Security WindowSecurity Setting Front Panel Redundancy Front Panel RedundancySetting Front Panel Redundancy Add Circuit Address Window Front Panel Redundancy Setting Front Panel Redundancy Ietf MIB Support EMM-E6 MIB StructureMIB Components Chassis MGRRepeater One, Repeater Two, and Repeater Three Host ServicesIP Services Ctron Use OnlyMIB Navigator Rmon DefaultDistributed LAN Monitor Rmon HostBrief Word About MIB Components and Community Names EMM-E6 MIB Structure Index Index-2 Index-3 Index Index-4
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