Fddi Paths | 3Com 2200 guide

8-6 CHAPTER 8: ADMINISTERING FDDI RESOURCES

2	Press [Return].
3	Enter the new statusReporting value (enabled or disabled).
	See the following example:
	Select station [1]:
	Station 1 - Enter new value (disabled,enabled) [enabled]:
	disabled

Administering	FDDI’s dual, counter-rotating ring consists of a primary ring and a secondary
FDDI Paths	ring. FDDI stations can be connected to either ring or to both rings
	simultaneously. Data ﬂows downstream on the primary ring in one direction
	from one station to its neighboring station. The secondary ring serves as a
	redundant path and ﬂows in the opposite direction. When a link failure or
	station failure occurs, the ring “wraps” around the location of the failure,
	creating a single logical ring.
	You can display FDDI path information and set the time values of the
	following attributes:
■	tvxLowerBound
■	tmaxLowerBound
■	maxTreq
	These values are used by all MACs conﬁgured in a path.

Displaying Path Information

FDDI path information includes the time values for tvxLowerBound, tmaxLowerBound, and maxTreq, as well as values for ring latency and trace status.

To display FDDI path information:

Top-Level Menu

system
ethernet	station
➧fddi	➧path
bridge	mac
ip	port
ip	port
snmp
analyzer
script
logout

1

➧display tvxLowerBound tmaxLowerBound maxTreq

2

From the top level of the Administration Console, enter:

fddi path display

You are prompted for a station and path. The Switch 2200 has one station, which appears in brackets.

When prompted for the station, press Return.

Image 89

3Com 2200 manual Fddi Paths

Contents

Superstack II Switch Administration Console User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Remote Access Parameters Administration Console Interface ParametersSetting Up an IP Interface for Management Online Help Rebooting the System Setting PasswordsAbout Setting Baselines Setting Baselines Setting lerAlarm Setting lerCutoff Setting tmaxLowerBoundSetting the Aging Time Starting Port Monitoring 10-7 Setting the Bridge Priority10-8 10-9 13-3 Using Groups in Packet Filters Listing GroupsOpcodes A-1 Destination Address Filter A-9 Support from 3Com Access by ModemWorld Wide Web Site 3ComForum on CompuServe Returning Products for Repair Introduction About this GuideFamiliarity with communications protocols that are used on Interconnected LANs This Guide How to UseSwitch 2200. The parts of the guide are described in Table This guide Conventions Documents, contact your sales representative for assistance SwitchDocumentation Comments Introduction Conﬁguration Tasks Administration OverviewAbout Switch Administration 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 Configurations, and spanning tree configurations System Management Setup Commands Task Quick CommandBridging Commands Task Quick Command For Details, See 12-1 and following Administer bridge port addressesDisplay bridge port information Set the multicast packet firewall threshold 9-2 to Ethernet Commands Task Quick Command For Details, SeeA summarized or detailed format 8-3 Fddi Commands Task Quick Command Initial User Access HOW to USEAccess Levels of User 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 Parameters AdjustingConsole Interface Disabling Reboot Abort Keys System consoleLock Enter the telnet timeout interval 30 minutes to 60 minutes Running Scripts Administration Console TasksSetting Timeout Interval for Remote Sessions HOW to USE the Administration Console Running Scripts of Administration Console Tasks Console GettingHelp To exit from the Administration Console Exiting returns you to the password promptExiting There, by pressing the ESC key SYSTEM-LEVEL Functions Page Management Access to the SystemAbout Setting Up Console Serial Port IP Interface for Setting Up an Broadcast Address Broadcast address Directed all 1s in the host fieldCost Ports All Ip interface modify Removing an Interface Timed out Gateway IP AddressTiming 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 Statistics are displayed, as shown in this example Displaying IP StatisticsIP statistics you can view are described in Table Community string settings are displayed as shown here Setting Up Snmp on Your SystemDisplaying Snmp Settings 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 Displaying System Conﬁguration Example of a Switch 2200 system conﬁguration displayEnvironment Initial passwords Setting Passwords You are prompted for the name of the system Setting the System NameChanging the Date and Time Rebooting You must disable the baseline About SettingBaselines Displaying the Current Baseline Baselining is automatically enabled when a baseline is set Setting BaselinesEnabling or Disabling Baselines Message similar to the following appears Nonvolatile Data SAVING, RESTORING, and Resetting Nonvolatile DataWorking with Saving NV Data NV Data RestoringSaving the NV data Restoration rules described here 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 Displaying PortsEthernet Port Information RxDiscards Describes the information provided about an Ethernet port Layer to receive them or because the port was disabled Default is enabledLong and are not configurable Disabled Successfully Second long and are not configurableTransmitted successfully TxPeakByteRate 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 Fddi Stations AdministeringResources Can be Thru, Isolated, WrapA, and WrapB Describes these statisticsConnectPolicy This value can be user-defined Description of Fields for Fddi Station Attributes TNotify Defaults for connecting to a Port MFrames NIF. This value can be user-defined TraceMaxExp Normal tree connection With defaults for connecting to a Port MTopology Node may not go to Thru state in CFM Enabling Disabling Status Reporting Setting Neighbor Notiﬁcation Timer Fddi Paths RingLatency Description of Fields for Fddi Path Attributes MaxTReqTmaxLowBound TraceStatus Current Trace status of the path TvxLowBound Station, which appears in brackets To set tvxLowerBound Fddi MACs Displaying MAC Information Administering Fddi MACs Describes the information provided for the Fddi MAC Description of Fields for Fddi MAC Attributes OldDownstream Error during receptionNeighbor OldUpstream 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 Analysis Roving AnalysisAbout Roving Receive Roving AnalysisOn a speciﬁc system Adding an Analyzer Port Removing an Analyzer Port Monitoring Starting PortYou can start monitoring port activity See the example below for starting port monitoring 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 Learning states. The default value is 15 seconds BridgeFwdDelayRoot. The default value is 2 seconds ForwardDelay Bridge Attributes Parameter Description MaxAge Default value is disabledIs determined by the root bridge Mode Disabling IP EnablingFragmentation Disabling IPX Address SettingThreshold Aging Time Enabling and Disabling STP on a Bridge Enter enabled or disabled at the promptSTP 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 Port is attached RxErrorDiscsDesignatedCost BPDUs from the designated bridge for that LAN Management frames Bridge Port Attributes Parameter Description RxFramesRxMcastExcDiscs Exceeded Disabled The port has been disabled by management Disabled in which the port is currently operatingBridge Port Attributes Parameter Description State Blocking The bridge continues to run the Spanning Tree Shows the order in which the discard decisions are made Multicast packet ﬁrewall, see Bridging Extensions Multicast LimitYou are prompted for port type Enabling STP Bridge PortDisabling STP On a Port Bridge port stpCost Bridge port stpPriority Listing Addresses Administering Port Addresses You are prompted for the port number From the top level of the Administration Console, enterEnter the number of the port You are prompted for one or more addresses to add 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 PushField Packet Filter Operands Description Opcode Packet fieldSize of the field can be 1, 2, 4, or 6 bytes Want the filter to examine a 48-bit address Constant 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 #4 Enter executable instruction #3Enter executable instruction #5 Enter executable instruction #6 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 Being edited Command are discardedDelete Previous Ctrl+h Character One position Delete Current Ctrl+d Editing, Checking Deleting Packet FiltersSaving Packet Filters At the Replace existing filter? prompt Bridge packetFilter load Loading Packet Filters Fddi Unassigning Packet Filters from Ports Using Groups Configuring Address Port Groups to USE Packet FiltersUser-deﬁned Packet Filtering in the SuperStack II Switch Address and port groups in packet ﬁlters 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 Ports to Groups AddingAddresses Address 08-37-21-65-78-c4 To remove an address from a group, enter Removing Addresses or Ports from a GroupOR, to remove a port from a group, enter Enter the ports in the syntax Address 08-42-21-84-78-f1 Loading Groups 13-11 Configuring Address and Port Groups to USE in Packet Filters Appendixes Opcodes Packet Filter OpcodesOpcodes are described in this section Name name Bytes PushLiteral.size value PushField.size offset Byte PushSAGM PushTopByte PushDAGM Byte Byte Eq equal PushSPGMByte PushDPGM Byte Le less than or equal to Ne not equalByte Lt less than Byte Bit-wise Gt greater thanByte Ge greater than or equal to Byte Xor bit-wise exclusive-OR Or bit-wise orByte Not Byte Accept Byte Shiftr shift right RejectByte Shiftl shift left Packet ﬁlter concepts Packet FilterExamples Address XNS To make a copy of the type ﬁeldPage Common Syntax Errors Number with a leading 0x or 0X is treated as Characters of the numberHexadecimal Number with a leading 0 is treated as octal Variety of services. This appendix describes these services ServicesOnline Technical Through the following online systems Press Return to see the 3ComForum main menu Access by Isdn Support from Maintenance, application training, and support servicesYour Network Supplier To ﬁnd your authorized service provider U.S. and Canada, call 800 876-3266 for customer service3Com Support contracts are available from 3Com Index Address Resolution Protocol. See ARP address threshold3ComFacts B-3 3ComForum B-2 Abort ARP cache ﬂushing 3-12 removing entry Cost Multicast limit, setting 11-7 Spanning Tree EnablingStatistics, displaying 10-1bridge port PortState Station MAC addresses 11-11Ethernet address SRFs 8-2 Connection policies, settingFddi path deﬁned Fddi port Enabling Le opcode A-5 Removing from -9, 3-10 status On-line technical services B-1opcode Name opcode A-1 Naming the Switch 2200 4-3ne opcode A-5Password conﬁguring Multicast frames Packet ﬁlters 12-1multicast limit Fddi ports 8-19ping IP station Broadcast address 3-4default mode 3-12displaying stateRlogin SMT event Snmp agent Accessing through IP 3-1deﬁned Snmp trapSnifﬁng. See roving analysis and analyzer Port LER Condition Port Path Change Deﬁned 8-7 setting SwitchTOpr Technical support B-1telnet Packet ﬁlter 12-12, 12-14, A-11 xor opcode A-7