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Cabletron Systems EMM-E6 Ethernet manual Examples of Class B Subnet Masks

Models: EMM-E6 Ethernet

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Table 1-7. Examples of Class B Subnet Masks

	Decimal	Binary	Available Subnet	Host IDs
	Mask	Equivalent	Addresses	Per Subnet


	192. 0	11000000 00000000	64 and 192	16,382

	224. 0	11100000 00000000	32, 64, 96, 128, 192,	8,190
	224. 0	11100000 00000000	224	8,190
			224

	240. 0	11110000 00000000	16 - 240	4,094
	240. 0	11110000 00000000	increments of 16	4,094
			increments of 16

	248. 0	11111000 00000000	8 - 248	2,046
	248. 0	11111000 00000000	increments of 8	2,046
			increments of 8

	252. 0	11111100 00000000	4 - 252	1,022
	252. 0	11111100 00000000	increments of 4	1,022
			increments of 4

	254. 0	11111110 00000000	2 - 254	510
	254. 0	11111110 00000000	increments of 2	510
			increments of 2

	255. 0	11111111 00000000	1 - 254	254

	255. 128	11111111 10000000	0 - 255.128	126
	255. 128	11111111 10000000	1 - 255. 0	126
			1 - 255. 0

			0 - 254. 192
	255. 192	11111111 11000000	0 - 255. 128	62
	255. 192	11111111 11000000	0 - 255. 64	62
			0 - 255. 64
			1 - 255. 0

			0 - 255. 32, 64, 96,
	255. 224	11111111 11100000	128, 160, 192, 224	30
	255. 224	11111111 11100000	0 - 254. 224	30
			0 - 254. 224
			1 - 254. 0

			0 - 254. 240
	255. 240	11111111 11110000	0 - 255. 16 - 240	14
	255. 240	11111111 11110000	increments of 16	14
			increments of 16
			1 - 255. 0

			0 - 255. 8 - 240
	255. 248	11111111 11111000	increments of 8	6
			0 - 254. 248

			0 - 255. 4 - 248
	255. 252	11111111 11111100	increments of 4	2
			0 - 254. 252

EMM-E6 User’s Guide

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Cabletron Systems EMM-E6 Ethernet manual Examples of Class B Subnet Masks

Contents

EMM-E6 EMM-E6 USER’S GuideWindows is a registered trademark of Microsoft Corp DOC Notice FCC NoticeCabletron SYSTEMS, INC Program License Agreement Vcci NoticeCabletron Software Program License Bellcore Testing InformationExclusion of Warranty Disclaimer of Liability United States Government Restricted Rights Table of Contents Table of Contents Configuration Screen Accessing Local Management Community NamesAttaching a Console Trap Table ScreenCommand Line Interface Screen MIB Navigator Router Setup Screen Device Statistics ScreenTroubleshooting Image File DownloadAppendix B EMM-E6 OIDs Appendix a EMM-E6 SpecificationsChapter Introduction Using this ManualIntroduction Using this Manual Lanviewsecure Support EMM-E6 FeaturesI960 Processor Design Available Routing ServicesIeee 802.1d Compliant Special Filtering DatabaseEMM-E6 User’s Guide Expandable Flash Eeprom Memory User Configurable EPIMsExpandable Ldram Lanview Diagnostic LEDsExpandable Sdram Snmp and Rmon supportLocal Communication Ports DLM SupportIn-Band Telnet with MIB Navigator Port Locking and Lanviewsecure SupportMmac with Flexible Network BUS Mmac Chassis Ethernet Channel a Ethernet Channels A, B, C, D, E, and FEthernet Channels B and C Other FNB Modules Snacmim TRMIM-32A TRMIM-34A TRRMIM-F2T TRRMIM-F3T Ethernet Channel DChannels E and F OSI Model BridgesFiltering and Forwarding Spanning Tree Algorithm Local Management Features Snmp Community NamesReview of Addressing MIBsMAC Addresses 00-00-1D-00-26-FBIP Addresses Class a Subnet Addresses Identifying IP Address ClassesSubnet Masks S H Examples of Class C Subnet Masks Examples of Class B Subnet Masks Operation of the Subnet Mask Default GatewayAddressing Example EMM-E6 User’s Guide Lanviewsecure Lanview LEDs and Reset SwitchEMM-E6 User’s Guide Related Manuals Getting HelpNetwork Requirements Chapter Requirements / Configurations1 10BASE-T Twisted Pair Network Network Requirements Multimode Fiber Optic Network Single Mode Fiber Optic Network Transceiver Requirements Thin-net NetworkRepeater Media Interface Modules Sample Repeater MIMs Port Assignment ModulesSample Network Configurations EMM-E6 as a Multiport Router Three Networks With a Single MMAC-FNBIng le Channe l Adding Users to a Separate SegmentFault Tolerant Wiring Hierarchy Sample Network Configurations EMM-E6 and BRIMs Chapter Installation Quantity Unpacking the EMM-E6EMM-E6 Mode Switches Setting Mode SwitchesDo not change the state of Switch 6 unless you Setting Mode Switches Locating SIMMs Simm UpgradesSimm Slot Locations Installing a Simm To install a Simm Installing SIMMsADDING/REPLACING EPIMs To install an EpimLocating BRIMs Brim Connector LocationsPRE-INSTALLATION Test Pre-Installation Test Installing the EMM-E6 Mmac M8FNB EMM-E6 EMM-E6 Installation CHECK-OUT Installation Checkout Connecting to the Network Connecting a Twisted Pair Segment to an EPIM-T EPIM-T 12. The EPIM-X Connecting an AUI Cable to an EPIM-XConnecting to an EPIM-F1/F2, or EPIM-F3 Connecting to the Network EMM-E6 User’s Guide Connecting a Thin-Net Segment to an EPIM-C 14. The EPIM-C 15. The EPIM-A Connecting an AUI Cable to an EPIM-AEMM-E6 User’s Guide Chapter Attaching a Console Configuring Your TerminalKeyboard Set-up Menu Display Setup MenuCommunications Setup Menu Configuring a Console Cable VT S i T i l Connecting to a VT Series TerminalConnecting to an IBM PC or Compatible Pinout Descriptions Configuring a UPS CableRJ45 DB9EMM-E6-960 Local Management Chapter Accessing Local ManagementFeature Selection Screen EMM-E6 User’s Guide Chapter Community Names Accessing the Community Name TableCommunity Name AccessCommunity Name Table Screen Fields Establishing Community Names Accessing the Configuration Screen Chapter Configuration ScreenIP Address Configuration Screen FieldsChannel Default Gateway Default InterfacePort Enable Override SubNET MaskHost IP applies to each interface Setting the Host IP AddressModifying a Subnet Mask Setting Default Gateway and Interface Setting Default Gateway and Interface CONNECTING/DISCONNECTING a UPS Enabling Ports Unlocking PortsChapter Trap Table Screen Accessing the Trap Table ScreenTrap Table Screen Fields Configuring the Trap TableSnmp Community Name TrapsIf you exit without saving, you lose all edits Chapter Snmp Tools Screen Accessing the Snmp Tools ScreenSnmp Tools Screen Fields Repeat Security Access LevelCycles Community Name Getting and Setting OidsGetting and Setting Oids Scrolling Through MIB Oids Scrolling Through MIB Oids EMM-E6 User’s Guide Router Setup Screen Chapter Router Setup ScreenDevice Statistics Screen Chapter Device Statistics ScreenDevice Statistics Device Statistics Screen Commands Network Selecting an Update FrequencySlot PortEnabling Ports Selecting a Network/Slot/PortExiting the Device Statistics Screen Disabling PortsEMM-E6 CLI Information Screen Chapter Command Line Interface ScreenManaging Device MIBs Chapter MIB NavigatorAccessing the MIB Navigator Conventions For MIB Navigator Commands MIB Navigator Command SET OverviewBranch Navigation CommandsFormat cd Path Example MIBNav cd iso/org/dod/internet/mgmt Navigation Commands cont’d13-6 EMM-E6 User’s Guide EMM-E6 User’s Guide 13-7 13-8 EMM-E6 User’s Guide EMM-E6 User’s Guide 13-9 13-10 EMM-E6 User’s Guide Example MIBNav arp -a Built-In CommandsNetstat Built-In Commands cont’dEMM-E6 User’s Guide 13-13 Example EMM-E6 User’s Guide 13-15 Format Done Special CommandsUsing Lanview Chapter TroubleshootingLED Color Description Error Condition Recommended ActionEMM-E6 User’s Guide 14-3 Troubleshooting Checklist Problem Possible Causes Recommended Action Troubleshooting Checklist14-6 EMM-E6 User’s Guide Using the Reset Switch Chapter Image File Download Decompress the image ﬁle Getting StartedForced Download with Unix 15-4 EMM-E6 Users Guide EMM-E6 Users Guide 15-5 15-6 EMM-E6 Users Guide Standard Local Download Standard Download ProcedureRemote Runtime Download Runtime Download Procedure 15-10 EMM-E6 Users Guide Bridging Functionality Appendix a EMM-E6 SpecificationsRepeater Functionality Environmental Requirements COM 1 PortCOM 2 Port Physical Properties Safety10BASE-T EPIM-T 10BASE-T Twisted Pair PortEPIM-F2 EPIM-F1/F2 Multimode Fiber Optic PortFigure A-4. EPIM-F3 EPIM-F3 Single Mode Fiber Optic PortParameter Typical Minimum Thin-net cable Figure A-5 EPIM-C BNC PortType Position D type receptacle EPIM-A and EPIM-X AUI PortSpanning Tree Protocol CtBridgeStpProtocolSpecificationAppendix B RptrScrAddrMgmtHashType Configuring ARP Request PacketsRptrPortGrpSrcAddrLock Port Group SecurityRptrSrcAddrMgmtPortLock RptrPortSecurityLockAddAddress RptrPortSecurityLockStatusRptrPortSecurityLockDelAddress Object IdentiﬁerRptrPortSecurityFullSecEnabled RptrPortSecurityDisableOnViolationEnabling Network Level Snmp Traps Enabling & Disabling Snmp TrapsRptrHwTrapsSetLink RptrHwTrapsSetSegRptrPortGrpHwTrapSetLink Enabling Module Level Snmp TrapsRptrSaTrapSetScraddr RptrPortGrpSaTrapSetSrcaddr Enabling Port Level Snmp TrapsRptrPortGrpHwTrapSetSeg RptrPortHwTrapSetSeg RptrPortHwTrapSetLinkChCompName ChCompAdminStatusActivating Rmon Groups Bridging Dot1dstpPortEnableTrunk Port Security RptrPortSrcAddrForceTrunkFnbPortConnectPortAssignment Channel SelectionFnbconnect RptrSrcAddrMgmtHashType OID Hashing on Source AddresesRemote Downloading 10BASE-FL Glossary10BASE-T ATMBrim BootpAUI Buses BroadcastCard ChassisCSMA/CD DNI DLMEeprom EpimFNB FddiIetf IanaIeee LAN ISOLanview LdramMIM MIBOID NvramRmim PVCRmon SdramSMA SimmSnmp SQETCP STPUTP Numerics IndexLanview Eeprom Tprmim LED Description EMM-E6Installation