Cabletron Systems EMM-E6 manual Setting the Hash Type, Setting the Aging Time

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Source Addressing

NOTE

The snapshots of the Source Address List that you can obtain via this feature do not reﬂect the current port security status of the SAT — that is, when Source Address Locking is enabled, you can still observe addresses being aged out of the table and new addresses being added as you refresh the Source Address List displayed in this window. However, the EMM-E6 remembers the addresses that were in the table when locking was enabled, and will continue to protect locked ports from access by unauthorized sources. For more information, see Locking Source Addresses, page 6-5.

Setting the Aging Time

The source address list Aging Time determines the minimum amount of time an inactive source address will remain in the Source Address Table before it is purged. The source address timer runs continuously beginning at the time the device is turned on; source addresses that are added to the SAT during one timer cycle will remain in the table for the rest of the current cycle and at least through the next complete cycle. If no packets have been received from that address during one complete cycle, the address will be purged.

The Aging Time is user-conﬁgurable, and can be set using the Aging Time text box in the Source Address list window.

To change the Aging Time:

1.In the Source Address List window (Figure 6-2, page 6-3), highlight the displayed aging time.

2.Enter your desired aging time in minutes; allowable range is 0 to 4320 (three days).

3.Click mouse button 1 on to save your change.

The new Aging Time takes effect immediately.

Setting the Hash Type

You can increase the efﬁciency with which your EMM-E6 handles the Source Address Table by selecting the appropriate hashing algorithm. If you are operating in a DECnet environment, or one which incorporates some DECnet elements, select the DEC hashing algorithm; if your network contains no DECnet elements (or at least none operating on the same network segment as your EMM-E6), select the non-DEC hashing algorithm. Making the wrong selection won’t do any damage, but making the correct selection will optimize performance.

To set the Hash Type for a repeater interface, or channel:

1.In the Repeater Source Address window, click mouse button 1 on the repeater interface for which you would like to set the hash type.

6-4	Setting the Hash Type

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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 CollisionsProtocols Frame SizesPort Type Using the EMM-E6 Hub View Checking Device Status and Updating Front Panel Info Name and LocationContact 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 nameNew deﬁnitions for station and trunk ports Secure address assignmentTrunk port security Conﬁgurable violation response Newest Lanviewsecure FeaturesContinuous learning mode Full or partial security against eavesdroppingLearned addresses reset Security on Non-LANVIEWSECUREMIMsForced non-secure status 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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