Cabletron Systems SmartCell 6A000 manual Iisp Routes and Network Topology

Page 41

Switch Administration

Setting Up Routes

For example, create a default IISP route from port B1.

SmartCell ZX# add iisproute

 

 

AtmAddress()

: < no netprefix specified

PortNumber(A1)

:

b1

Metric(1)

:

 

SmartCell ZX#

 

 

To see the route in the SmartCell 6A000 routing table, enter the following:

Top # show iisp

EntryNum PortNum Metric Length ATM Address

============================================================================

0

B1

1

0

default route

SmartCell ZX#

Default IISP routes are used primarily as gateway connections to other LAN segments or to a WAN connection. For instance, a SmartCell 6A000 contains four standard IISP routes and one default IISP route. If a connection is being established whose address does not correspond to one of the four standard IISP routes, the connection is automatically forwarded to the default IISP route.

Because of the default IISP route's lack of a definite ATM address, be careful when using these routes. Observe the following rules when using default IISP routes:

•Never add more than one default IISP route on any SmartCell 6A000.

•Do not use default IISP routes as an "easy" way to create a route between two devices.

•Do not over use default IISP routes. Doing so can create overly complicated network topologies.

•When using IISP routes, be careful not to create ambiguous routes or routing loops.

•Restrict the use of default IISP routes to gateway connections out of the local LAN segment.

IISP Routes and Network Topology

IISP is implemented on the SmartCell 6A000 switch so that a route's destination address is some sequential portion (always starting with the first byte) of a 20-byte ATM address. Usually, the default netprefix is used (first thirteen bytes). However, routes can be defined using more or fewer bytes than the thirteen netprefix bytes.

This ability to define destination addresses by masking off portions of an ATM address allows multiple SmartCell 6A000 switches to be connected in flexible configurations. Furthermore, you can change the netprefix of a switch (or a port on a switch) to any value by using the set netprefix command. Combining these two capabilities, you can define routes with simple addressing schemes and create hierarchical network topologies.

For example, Figure 4-2 shows three groups of switches: A, B and C. Use the set netprefix. command to change the first two bytes of the netprefix for switches within A, B, and C to 11:22.

Add a third byte to the netprefix of each group (a group identifier), such that

•Group A = 11:22:33

•Group B = 11:22:44

•Group C = 11:22:55

Within each group, add one more byte to each switch address (a switch identifier). Each switch (route destination) can now be specified by

11:22: + group identifier byte + switch identifier byte

For example, switches in group A are 11:22:33:00 and 11:22:33:01

SmartCell 6A000 User Guide 4-7

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Contents Order number Part number 04-0045-01 Rev. a SmartCell 6A000 User GuideIi SmartCell 6A000 User Guide FCC Class a Notice Declaration of Conformity Addendum Safety Information Class 1 Laser Transceivers Fiber Optic Protective Caps Regulatory Compliance Summary Safety Revision History Table of Contents Troubleshooting Acronyms Index Table of Contents Xii SmartCell 6A000 User Guide List of Figures List of Figures Xiv SmartCell 6A000 User Guide List of Tables List of Tables Xvi SmartCell 6A000 User Guide Introduction Introduction SmartCell 6A000 User Guide Unpacking the Switch Switch Installation and SetupInspecting the Switch Check Accessory Carton Contents6A000-04 and 6A000-02 front panels Mbps STS-3c/STM-1 UTP5, 4 Ports Installing the SwitchInstalling the Switch Installing the SmartCell 6A000 Adapters provided for connecting to the switch Configuring the Switch6A000 console and network connections Console Commands Using the ConsoleEnter Adding and ModifyingClient UNIATMAddress 390000000000000000001441800020d414418000 Console HelpServerAddress 390000000000000000001441800020d414418001 Creating AN IP Over ATM Vlan IP Over ATM and LaneIpatmarp ATM Addressing for IP over ATMSmartCell ZX # add wellknownaddress Creating AN Emulated LANELANType802.3 The default Ethernet is used ATM Addressing for LAN Emulation Elan1 ELANs Across Multiple SwitchesSwitch Clients Path /backdir/config-1 Switch AdministrationBacking UP and Restoring Switch Configuration Path server.ima Upgrading Operating SoftwareUsing the df Command to Recover Setting UP RoutesUnsuccessful Update Creating Iisp Routes Iisp RoutingSmartCell ZX # show netprefix a4 ATMAdress 39000000000000000000144780 SW2s netprefixATMAdress 39000000000000000000144180 SW1s netprefix Iisp Routes Among Multiple SwitchesATMAdress 39000000000000000000141500 SW3s netprefix Iisp routes between multiple switches Default Iisp RoutesIisp Routes and Network Topology For example, create a default Iisp route from port B1Routing Loops 112255 112244UNI Routes SigConfig and PortAutoDetect with Iisp RoutingIisp Metrics and Load Sharing UNIATMAddress 440000000000000000001441800030E514418000IP Routing To see the route, enter the show route command on SW2 Logs and AlarmsViewing and Filtering Messages How Log Messages and Alarm Messages DifferLog Message System Console Setting UP PVC ConnectionsPoint-to-Point PVCs Connecting to Local Client Through Point-to-Point PVC100 10.1.1.0Point-to-Multipoint PVCs Show vccmask Non-zero VPIsSmartCell ZX # show portconfig a1 SmartCell ZX # set portconfig a1Traffic Descriptors Traffic Management5000 8000Call Admission Control Policy # set cacparams Class of Service QueuesPortNumberALL Port ID Queue EFCI, EPD, and RM Thresholds Class of Service Queue Allocation GuidelinesSmartCell ZX # show switchtrafficcongestion Traffic Management Logprint off command TroubleshootingTroubleshooting IP Over ATM Troubleshooting LAN Emulation Global Congestion Troubleshooting CongestionDiagnosing Congestion Port Congestion Troubleshooting TroubleshootingCongestion Troubleshooting Congestion Front Panel Appendix a Features and SpecificationsHardware Components Figure A-1 Front panel CPU ModuleInput/Output Port Modules Switch Modules MSM and ESMModule TypeCharacteristics Figure A-3 Group and port identifiers Port NumberingSwitch Module FeaturesSignaling and Routing 3 I/O ModulesLAN Servers and Clients Connection ManagementManagement ATM Forum LAN Emulation LanePhysical Specifications SpecificationsTechnical Specifications Standards Specifications ATM Port SpecificationsRJ-45 DB-25 Pin Color Description CPU Serial Port Pin-Out DescriptionsTable A-11 RJ-45 to DB-25 Adapter Modem Adapter Appendix A-12 SmartCell 6A000 User Guide Internet MIB Hierarchy Appendix B Smartcell 6A000 and SnmpFigure B-1 Internet MIB Hierarchy Zeitnet Proprietary MIBFigure B-2 ZeitNet Private MIBs Interpreting the Object IdentifierProprietary MIB Functions Client for Snmp Management Console Commands That Affect the AgentMIB Exceptions Non-ConformanceNot Supported SmartCell 6A000 User Guide Appendix B-7 Page Electronic Services FAX ServiceAppendix C Technical Support Telephone AssistanceRepair Services Hardware WarrantySoftware Warranty Appendix D Acronyms Can CACCBR CcittDTE DCCDVT NETFifo FCSFTP IeeeIP/ATM IOMIPX ITU-TSSLeselan LESLIS LLCNFS NetbeuiNIC NLSPMD PDUPMP PPDSAR SaalSAR-PDU SBETCP TaxiTDM TftpVCI VCCVCL VlanAcronyms Appendix D-12 SmartCell 6A000 User Guide Index Add wellknownaddress command 3-6 AddressSetting up routes Vlan Index SmartCell 6A000 User Guide
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