Shows the order in which the discard tests are made | 3Com 2200

8-16 CHAPTER 8: ADMINISTERING FDDI RESOURCES

Figure 8-2 shows the order in which the discard tests are made.

Transmit Frame Statistics. . .

txUcastFrame s txMcastFram es

txDiscards

txQOverflows

txInternalErrs

txFrames

Frames delivered to this MAC

Frames discarded because LLC Service disabled or ring not

Frames discarded because transmit queue full

Frames discarded because of error during transmission

=Frames successfully transmitted to the network

processing of

. . .to FDDI Network

Figure 8-2 How Frame Processing Affects FDDI MAC Transmit Frame Statistics

Setting the Frame Error Threshold

	Top-Level Menu
	system
	system	station
	ethernet	station
	ethernet	path
	➧fddi	path		summary
	➧fddi	➧mac		summary
	bridge	➧mac		detail
	ip	port		➧frameErrorThreshold
	ip			➧frameErrorThreshold
	snmp			notCopiedThreshold
	analyzer			notCopiedThreshold
	analyzer			llcService
	script			llcService
	script			path
	logout

The FrameErrorThreshold attribute determines when a MAC condition report is generated because too many frame errors have occurred. A frame error occurs when a frame becomes corrupted. A high error rate often indicates a faulty station on the FDDI ring or a dirty FDDI connector.

Station Management (SMT) monitors the ratio of frame errors to all frames transmitted within a certain period of time. The FrameErrorThreshold determines at what percentage the frame errors are signiﬁcant enough to report to network management. The threshold value is expressed in a percentage based on 65536 (or 100%). For example, to set the threshold at 1%, the value is 655 (the system default). The lower you set the percentage, the more likely SMT will report a problem.

To set the FrameErrorThreshold:

1From the top level of the Administration Console, enter:

fddi mac frameErrorThreshold

You are prompted for a MAC number and new value. The Switch 2200 has one MAC, which appears in brackets.

2Press [Return].

3Enter the new threshold value.

Image 99

3Com 2200 manual Shows the order in which the discard tests are made, Setting the Frame Error Threshold

Contents

Superstack II Switch Administration Console User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Online Help Administration Console Interface ParametersRemote Access Parameters Setting Up an IP Interface for Management Setting Baselines Setting PasswordsRebooting the System About Setting Baselines Starting Port Monitoring Setting tmaxLowerBoundSetting lerAlarm Setting lerCutoff Setting the Aging Time 10-9 Setting the Bridge Priority10-7 10-8 Destination Address Filter A-9 Using Groups in Packet Filters Listing Groups13-3 Opcodes A-1 Returning Products for Repair Access by ModemSupport from 3Com World Wide Web Site 3ComForum on CompuServe Interconnected LANs About this GuideIntroduction Familiarity with communications protocols that are used on How to Use Switch 2200. The parts of the guide are described in TableThis Guide This guide Conventions Switch DocumentationDocuments, contact your sales representative for assistance Comments Introduction Administration Overview About Switch AdministrationConﬁguration Tasks Adjust the console screen height for your terminal General System Commands Task Quick Command For Details, See Change the factory default baud rate of the Console port To the system, or reset nonvolatile data to defaults System Management Setup Commands Task Quick Command Bridging Commands Task Quick Command For Details, SeeConfigurations, and spanning tree configurations Set the multicast packet firewall threshold Administer bridge port addresses12-1 and following Display bridge port information Ethernet Commands Task Quick Command For Details, See A summarized or detailed format9-2 to 8-3 Fddi Commands Task Quick Command Levels of User HOW to USEInitial User Access Access Select access level read, write, administer Password Using Menus to Perform Tasks System-level Functions Menu Hierarchy for Administer Access Bridge Menu Fddi Menu IP Menu Bridging Menu Hierarchy for Administer Access Analyzer Menu Snmp Menu Menu options are not case sensitive Most abbreviated version of the same command string is Entering Values Adjusting Console InterfaceParameters Disabling Reboot Abort Keys System consoleLock Running Scripts Administration Console Tasks Setting Timeout Interval for Remote SessionsEnter the telnet timeout interval 30 minutes to 60 minutes HOW to USE the Administration Console Running Scripts of Administration Console Tasks Getting HelpConsole There, by pressing the ESC key Exiting returns you to the password promptTo exit from the Administration Console Exiting SYSTEM-LEVEL Functions Page Access to the System AboutManagement Setting Up Console Serial Port IP Interface for Setting Up an Broadcast Address Directed all 1s in the host field Cost Ports AllBroadcast address Ip interface modify Removing an Interface Gateway IP Address Timing outTimed out Defining a Static Route Default route is immediately removed from the routing table Administering the ARP Cache Setting the RIP Mode You could receive one of the following responses Enter the IP address of the station you want to ping Displaying IP Statistics IP statistics you can view are described in TableStatistics are displayed, as shown in this example Setting Up Snmp on Your System Displaying Snmp SettingsCommunity string settings are displayed as shown here Community string length Administering Snmp Trap Reporting Enter an IP address of the Snmp manager destination address Conﬁguring Trap Reporting Trap address invalid or unreachable This example shows a trap conﬁguration You receive the following prompt Remote SMT events. On all other Switch 2200s in your network Snmp trap smtProxyTraps Example of a Switch 2200 system conﬁguration display EnvironmentDisplaying System Conﬁguration Initial passwords Setting Passwords Setting the System Name Changing the Date and TimeYou are prompted for the name of the system Rebooting Displaying the Current Baseline About SettingYou must disable the baseline Baselines Message similar to the following appears Setting BaselinesBaselining is automatically enabled when a baseline is set Enabling or Disabling Baselines SAVING, RESTORING, and Resetting Nonvolatile Data Working withNonvolatile Data Saving NV Data Restoration rules described here RestoringNV Data Saving the NV data System nvData restore You are returned to the NV data menu options Examining a Saved NV Data File You see the following prompt Resetting NV Data to Defaults Ethernet and Fddi Parameters IIIPage Information PortsDisplaying Ethernet Port RxDiscards Describes the information provided about an Ethernet port Disabled Default is enabledLayer to receive them or because the port was disabled Long and are not configurable TxPeakByteRate Second long and are not configurableSuccessfully Transmitted successfully There is no buffer space available Frame is in error TxFrames Frames delivered to this port TxDiscards TxQOverflows Labeling a Port Setting the Port State Administering ResourcesFddi Stations This value can be user-defined Describes these statisticsCan be Thru, Isolated, WrapA, and WrapB ConnectPolicy TraceMaxExp Defaults for connecting to a Port MDescription of Fields for Fddi Station Attributes TNotify Frames NIF. This value can be user-defined Node may not go to Thru state in CFM With defaults for connecting to a Port MNormal tree connection Topology Enabling Disabling Status Reporting Setting Neighbor Notiﬁcation Timer Fddi Paths TraceStatus Current Trace status of the path TvxLowBound Description of Fields for Fddi Path Attributes MaxTReqRingLatency TmaxLowBound Station, which appears in brackets To set tvxLowerBound Fddi MACs Displaying MAC Information Administering Fddi MACs Describes the information provided for the Fddi MAC OldUpstream Error during receptionDescription of Fields for Fddi MAC Attributes OldDownstream Neighbor There is no buffer space available Frame is in error Receive Frame Network Shows the order in which the discard tests are made Setting the Frame Error Threshold Enter the new threshold value. See the following example Setting the Not Copied Threshold Setting MAC Paths Enabling Disabling LLC Service Displaying Port Information Administering Fddi Ports Describes the type of information provided for an Fddi port Setting lerCutoff Setting Port Labels Fddi port path Roving Analysis About RovingAnalysis Roving Analysis On a speciﬁc systemReceive Adding an Analyzer Port Removing an Analyzer Port See the example below for starting port monitoring Starting PortMonitoring You can start monitoring port activity Stopping Port Monitoring Bridging Parameters Information about the bridge is displayed Displaying Bridge Information Each item in the bridge parameter list is described in Table Following example shows a display of bridge information ForwardDelay BridgeFwdDelayLearning states. The default value is 15 seconds Root. The default value is 2 seconds Mode Default value is disabledBridge Attributes Parameter Description MaxAge Is determined by the root bridge Disabling IPX EnablingDisabling IP Fragmentation Aging Time SettingAddress Threshold Enter enabled or disabled at the prompt STP BridgeEnabling and Disabling STP on a Bridge To conﬁgure the STP bridge priority Setting the Bridge Maximum Age To conﬁgure the forward delay value Forward delay The recommended value is 15 seconds Setting the STP Group Address Bridge Port Following example shows a bridge port detail display Following example shows a bridge port summary display BPDUs from the designated bridge for that LAN RxErrorDiscsPort is attached DesignatedCost Exceeded Bridge Port Attributes Parameter Description RxFramesManagement frames RxMcastExcDiscs Blocking The bridge continues to run the Spanning Tree Disabled in which the port is currently operatingDisabled The port has been disabled by management Bridge Port Attributes Parameter Description State Shows the order in which the discard decisions are made Multicast Limit You are prompted for port typeMulticast packet ﬁrewall, see Bridging Extensions On a Port STP Bridge PortEnabling Disabling STP Bridge port stpCost Bridge port stpPriority Listing Addresses Administering Port Addresses You are prompted for one or more addresses to add From the top level of the Administration Console, enterYou are prompted for the port number Enter the number of the port Flushing All Addresses You are prompted for the port numbers Packet Filtering Packet Filters Listing Packet Filters Displaying Packet Filters Creating and Using Packet Filters Describes the instructions and stacks of a packet ﬁlter Ethernet and Fddi Packet Fields Basic Elements of a Packet Filter Want the filter to examine a 48-bit address Constant Packet Filter Operands Description Opcode Packet fieldPushField Size of the field can be 1, 2, 4, or 6 bytes Accept and Reject Instructions Creating Packet Filters 12-9 Preprocessed and Run-time Storage Opcode.size operand... # comment 12-11 Creating and Using Packet Filters # XNS Filtering Section Pseudocode translates into the following packet ﬁlter Enter executable instruction #2 Enter executable instruction #1 Enter executable instruction #6 Enter executable instruction #3Enter executable instruction #4 Enter executable instruction #5 Only IP pkts w/in socket range This combination looks like this Add a not statement to discard any matching packets Maximum length of a packet ﬁlter deﬁnition is 4096 bytes Character One position Delete Current Ctrl+d Command are discardedBeing edited Delete Previous Ctrl+h Packet Filters Deleting Packet FiltersEditing, Checking Saving At the Replace existing filter? prompt Bridge packetFilter load Loading Packet Filters Fddi Unassigning Packet Filters from Ports Address and port groups in packet ﬁlters Configuring Address Port Groups to USE Packet FiltersUsing Groups User-deﬁned Packet Filtering in the SuperStack II Switch To list the currently deﬁned groups, enter this command OR, for port groups, enter the following command Displaying Groups Enter this command Creating New Groups Address 08-32-45-e3-32-21 Enter the ports in this syntax Port Ethernet Adding AddressesPorts to Groups Address 08-37-21-65-78-c4 Enter the ports in the syntax Removing Addresses or Ports from a GroupTo remove an address from a group, enter OR, to remove a port from a group, enter Address 08-42-21-84-78-f1 Loading Groups 13-11 Configuring Address and Port Groups to USE in Packet Filters Appendixes Name name Packet Filter OpcodesOpcodes Opcodes are described in this section Bytes PushLiteral.size value PushField.size offset Byte PushTopByte PushSAGM Byte PushDAGM PushSPGM Byte PushDPGMByte Eq equal Ne not equal Byte Lt less thanByte Le less than or equal to Gt greater than Byte Ge greater than or equal toByte Bit-wise Byte Accept Or bit-wise orByte Xor bit-wise exclusive-OR Byte Not Reject Byte Shiftl shift leftByte Shiftr shift right Packet Filter ExamplesPacket ﬁlter concepts Address XNS To make a copy of the type ﬁeldPage Common Syntax Errors Number with a leading 0 is treated as octal Characters of the numberNumber with a leading 0x or 0X is treated as Hexadecimal Through the following online systems ServicesVariety of services. This appendix describes these services Online Technical Press Return to see the 3ComForum main menu Access by Isdn Supplier Maintenance, application training, and support servicesSupport from Your Network Support contracts are available from 3Com U.S. and Canada, call 800 876-3266 for customer serviceTo ﬁnd your authorized service provider 3Com ARP cache ﬂushing 3-12 removing entry Address Resolution Protocol. See ARP address thresholdIndex 3ComFacts B-3 3ComForum B-2 Abort Multicast limit, setting 11-7 Spanning Tree Enabling Statistics, displaying 10-1bridge portCost Fddi port SRFs 8-2 Connection policies, settingPortState Station MAC addresses 11-11Ethernet address Fddi path deﬁned Enabling Le opcode A-5 Removing from -9, 3-10 status Multicast frames Packet ﬁlters 12-1multicast limit Name opcode A-1 Naming the Switch 2200 4-3ne opcode A-5On-line technical services B-1opcode Password conﬁguring Broadcast address 3-4default mode 3-12displaying state RloginFddi ports 8-19ping IP station Port LER Condition Port Path Change Snmp agent Accessing through IP 3-1deﬁned Snmp trapSMT event Snifﬁng. See roving analysis and analyzer Packet ﬁlter 12-12, 12-14, A-11 xor opcode A-7 SwitchDeﬁned 8-7 setting TOpr Technical support B-1telnet