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Chapter 4: Monitoring and Managing Your FN10

Page 4-14

Fast Network 10 User Guide

4.3.3 Displaying Manufacturing Information

The

ident

command identifies FN10 manufacturing information,

including the part number and any power-up test codes and diagnostic
data. To display the manufacturing information, at the LCM prompt:

1. Type

ident

LCM displays the following type of information:

4.4 MANAGING THE FN10

Managing the FN10 consists of:

•

Disabling and enabling Ethernet ports

•

Changing a subnet mask

•

Changing a community name

•

Setting the baud rate of your terminal connection

•

Setting a reboot time

You can use the Local Console Manager (LCM), any of the Cabletron
Systems NMSs, or a standard SNMP-based NMS to manage the FN10.
Refer to Section 4.1.

Part Number:

Power-up test codes:
Diagnostic data:

00000000 ff006000

501-3000-002

00000000 00000000 00000000 00000000

00000000 00000000 fffffffc fffffffc

X70002e4-0006891

Up-Link Module Part Number: 123-4567-891 X1234567-1234567

Содержание Fast Network 10

Страница 1: ...Segment Status Select TX RX Act Col Reset Ready FN10 12 NMS Port Pwr X 2X 3X 4X 5X 6X 7X 8X 9X 10X 11X 12X 13X 14X 15X 16X 17X 18X 19X 20X 21X 22X 23X 24X 13 14 15 16 17 18 19 20 21 22 23 24 AUI 1 Lin...

Страница 2: ......

Страница 3: ...ABLE FOR ANY INCIDENTAL INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES WHATSOEVER INCLUDING BUT NOT LIMITED TO LOST PROFITS ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT EVEN...

Страница 4: ...NG Changes or modifications made to this device which are not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment DOC NOTICE This digita...

Страница 5: ...ment shall be interpreted and governed under the laws and in the state and federal courts of New Hampshire You accept the personal jurisdiction and venue of the New Hampshire courts EXCLUSION OF WARRA...

Страница 6: ...in all respects is proprietary data belonging to Cabletron and or its suppliers For Department of Defense units the product is licensed with Restricted Rights as defined in the DoD Supplement to the...

Страница 7: ...1 FN10 Trunking 1 11 1 5 4 2 FN10 s Fast Ethernet Option 1 12 1 5 4 3 Virtual Workgroups 1 14 1 6 Local Console Manager 1 15 1 6 1 Command Syntax Conventions 1 16 1 6 2 Basic LCM Commands 1 17 1 6 2 1...

Страница 8: ...Storm Protection 3 16 3 11 Modifying MIB Variables 3 17 3 11 1 System Contact 3 17 3 11 2 System Name 3 17 3 11 3 System Location 3 17 3 11 4 Authentication Password 3 18 3 11 5 Aging Parameter 3 18 C...

Страница 9: ...3 Using Filters for Security Purposes 5 10 5 4 Using Filters to Enhance Network Performance 5 16 5 5 Configuring a Port Filter 5 19 5 5 1 Modifying a Port Filter 5 22 5 5 2 Deleting a Port Filter 5 2...

Страница 10: ...APPENDIX A TECHNICAL SPECIFICATIONS A 1 FN10 Specifications A 1 A 2 Serial Cable Pin Assignments A 3 A 3 10BASE T Pin Assignments A 3 A 4 Straight through Wiring A 4 A 5 Crossover Wiring A 5 A 6 5 4 3...

Страница 11: ...instructions and guidelines applicable to most NMSs are provided The contents of each chapter are described below Chapter 1 Introduction outlines the contents of this manual and provides an overview...

Страница 12: ...pendix A Technical Specifications provides the FN10 specifications and basic 10BASE T cabling pin assignments Appendix B Glossary provides a glossary of terms both specific to the FN10 and common to t...

Страница 13: ...ommand is enclosed in angle brackets For example you must enter a port number and an IP address to execute the ipaddr port IP address command FN10 ipaddr 6 192 138 217 40 Field value options appear in...

Страница 14: ...llowing configuration options 12 port 12 IEEE 802 3 10BASE T Ethernet ports including one Ethernet Attachment Unit Interface AUI connection 12 port with FE up link option 2 Fast Ethernet ports 100 Mbp...

Страница 15: ...igurable parameters Supports 48 bit IEEE 802 MAC addressing Front Panel with 12 10BASE T 10 Mbps Ports Front Panel with 24 10BASE T 10 Mbps Ports X 2X 3X 4X 5X 6X 7X 8X 9X 10X 11X 12X AUI 1 Link 2 3 1...

Страница 16: ...chitecture The FN10 enables you to link two or more Local Area Networks LANs together To accomplish this the FN10 regulates network traffic on the basis of the source and destination addresses that ar...

Страница 17: ...10 to temporarily store packets until network resources typically an unused link are available for forwarding This allows for complete error checking and limits the amount of time between when a devic...

Страница 18: ...performance of the network 1 5 1 3 Spanning Tree Algorithm The FN10 supports the IEEE 802 1d Spanning Tree algorithm The Spanning Tree algorithm converts multiple LANs into a spanning tree of networks...

Страница 19: ...each packet to the correct LAN segment The FN10 learns addresses from all packets including data transmissions and keep alive packets packets sent by an idle station to let other stations know it is p...

Страница 20: ...bilities A filter is an instruction to the FN10 to screen data packets based on the criteria you define Filtering is useful for gathering statistics implementing security measures and improving networ...

Страница 21: ...up to 80 Mbps For example local traffic such as the Manufacturing Department s internal traffic can be easily handled by a single 10 Mbps connection However when the Manufacturing Department needs acc...

Страница 22: ...ion of 100 Mbps Applying this increased bandwidth to the previous example the Manufacturing Department s traffic to the corporate database could be transmitted to the corporate database at the 100 Mbp...

Страница 23: ...g increased bandwidth of the optional Fast Ethernet configuration Figure 1 8 FN10 Application 4 FN10 FE LAN segment FN10 FE 100 Mbps bandwidth LAN segment Fast Ethernet Rear Panel Rear Panel Front Pan...

Страница 24: ...and broadcast packets are routed directly to hosts within the workgroup eliminating the need to perform a general broadcast across each segment of the network to find specific host addresses Figure 1...

Страница 25: ...ssociate multiple hosts and define a workgroup In reality you are assigning workgroup IDs to FN10 ports 1 6 LOCAL CONSOLE MANAGER The Local Console Manager LCM is a command line interface built into t...

Страница 26: ...after you type it in A port range is either a single port number or a list of port numbers separated by commas or hyphens For example 3 is port 3 3 7 are ports 3 and 7 3 5 are ports 3 4 and 5 and 3 5...

Страница 27: ...ers is displayed between braces for example off on noBPDU you must select one of the displayed options For example if you wanted to enable bridging on a port or a range of ports you would enter FN10 b...

Страница 28: ...PORT RANGE filters display modify add delete community sttimer TIME VALUE to display unit or port status to change the console baud rate to logout to display unit identification to set or display IP a...

Страница 29: ...the exit command 1 6 2 5 Traplog Displays the traps messages captured by the FN10 The following is an example of a traplog display FN10 traplog Trap 16 0 00 00 The unit has booted Trap 25 0 00 00 The...

Страница 30: ...Chapter 1 Introduction Page 1 20 Fast Network 10 User Guide...

Страница 31: ...stallation Documentation In addition to this manual the Fast Network 10 Quick Setup card the Fast Network 10 Local Console Manager LCM Commands Reference Card the Fast Network 10 MIB Reference Guide a...

Страница 32: ...3 1 4 5 6 7 8 9 10 11 12 A B Usr Segment Status Select TX RX Act Col Reset Ready FN10 12 NMS Port Pwr X 2X 3X 4X 5X 6X 7X 8X 9X 10X 11X 12X 13X 14X 15X 16X 17X 18X 19X 20X 21X 22X 23X 24X 13 14 15 16...

Страница 33: ...monitoring Receive RX activity on all ports On Indicates you are monitoring Transmit TX and Receive RX activity on all ports On Indicates you are monitoring packet collision on all ports On Indicates...

Страница 34: ...the unit as shown in Figure 2 3 In addition make sure the unit is within reach of the network cables to which it will be connected Figure 2 3 Installing the Stick on Feet Table 2 2 Description of FN10...

Страница 35: ...emperature Since the temperature within a rack assembly may be higher than the ambient room temperature make sure the rack environment temperature is within the Operating Temperature range specified i...

Страница 36: ...a three prong grounded outlet 2 2 1 Checking the Power up Diagnostics Sequence Before connecting any devices to the FN10 power on the unit and observe the power up diagnostics sequence to check for p...

Страница 37: ...9 pin serial cable shipped with the unit Only three of the nine wires are necessary Receive Data Transmit Data and Ground 2 Set the terminal to 9600 baud 8 data bits 1 stop bit and no parity 3 Press...

Страница 38: ...he FN10 through a punch down block or patch panel do the following 1 Connect one end of the 10BASE T or optional 100BASE TX cable to the device s network interface card 2 Connect the other end of the...

Страница 39: ...ETHERNET MODULE The FN10 is available with an optional Fast Ethernet module to add two additional ports that can be configured for either 10 or 100 Mbps If you have purchased a FN10 FE the Fast Ether...

Страница 40: ...Inserting the FE Module Assembly 4 When the FE assembly makes contact with the internal connector gently press the assembly into the FN10 to allow the connector to snap firmly into place 5 Tighten the...

Страница 41: ...etwork 10 User Guide Page 2 11 Figure 2 7 Completed FE Module Installation 6 Reconnect the FN10 to the network plug in the power cord and power on the unit 7 Configure the FE module using the LCM comm...

Страница 42: ...Chapter 2 Unpacking and Installing Your FN10 Page 2 12 Fast Network 10 User Guide...

Страница 43: ...nd RS232C connection attached to any non intelligent terminal See Section 3 1 Assigning IP Addresses Once you have assigned an IP address you can use any of the following network management tools to c...

Страница 44: ...nking status Defining and deleting virtual workgroups Assigning a community name NOTE You can use the LCM erase command to erase all configuration information on the next system reset If you are using...

Страница 45: ...fy the network and the last two identify the node The first byte of a class B address must be in the range 128 191 The address 128 150 50 10 identifies node 50 10 on network 128 150 Class C addresses...

Страница 46: ...cally convert the displayed mask to the standard default based on the port s IP address class Class A address masks are 255 0 0 0 Class B address masks are 255 255 0 0 Class C address masks are 255 25...

Страница 47: ...rk to logically configure the network as a single spanning tree Using LCM to enable bridging for a port or port range at the LCM prompt 1 Type bridge PORT RANGE off on noBPDU For example bridge 2 on w...

Страница 48: ...s at the LCM prompt 1 Type bridge LCM responds with a list of all ports and the bridging function that is enabled For example typing bridge would display the bridging status for all ports You could al...

Страница 49: ...t enables you to use multiple 10BASE T Ethernet segments to connect FN10s together while maintaining first in first out ordering of Ethernet packets In addition if any of the Ethernet segments configu...

Страница 50: ...re 3 2 you could connect them using a single Ethernet segment However that would limit the interconnection to 10 Mbps To solve this problem you could connect A to B with one Trunk Group and connect B...

Страница 51: ...y determines which ports are part of which Trunk Group After Trunk Group configuration the FN10s complete the standard 802 1D Spanning Tree state changes treating each Trunk Group as a single 802 1D S...

Страница 52: ...rejected After a short time out period another attempt is automatically initiated to establish a good trunk connection Joined Trunking is enabled and the Trunking Protocol has established a good trun...

Страница 53: ...automatically initiated to establish a good trunk connection Joined Trunking is enabled and the Trunking Protocol has established a good trunk connection Off Trunking is not enabled Perturbed Trunkin...

Страница 54: ...Workgroup destinations are recognized by the FN10 and packets are routed directly to hosts within the workgroup eliminating the need to perform a general broadcast across each segment of the network...

Страница 55: ...ment that includes hosts that belong to workgroup A and workgroup B Port 13 connects workgroup A to the router and port 24 connects workgroup B to the router In the above steps both command lines did...

Страница 56: ...create modify and delete virtual workgroups The full syntax of the command is as follows workgroup NAME delete PORT RANGE INFO The options for INFO include ip IP ADDRESS NETMASK indicates an IP netwo...

Страница 57: ...ssword You use the same steps to assign a new community name or to change an existing community name This sets the MIB variable sxadminAnyPass You can then enter a community name to perform any SNMP s...

Страница 58: ...s that can be transmitted within a given time period For example if you configure FN10 to transmit onto Port 3 no more than five multicasts per 60 seconds any multicasts destined for Port 3 are discar...

Страница 59: ...for example sxadminGetPass sxadmin 3 The Display String line shows the range of values that can be used for the given parameter In each case the DisplayString is a string of ASCII characters 3 11 1 S...

Страница 60: ...sword The get password variable sxadminGetPass must be set to the value of the community name used by the SNMP manager for performing get operations A zero length password means that any community nam...

Страница 61: ...tting the community name for the FN10 and changing the baud rate for your Local Console Manager LCM connection 4 1 FN10 MANAGEMENT TOOLS LCM is a command line interface built into the FN10 that enable...

Страница 62: ...rmance and to make configuration changes as necessary For example Ethernet port statistics can help you identify network devices that require high bandwidth and therefore should be connected through a...

Страница 63: ...riables you can obtain a detailed analysis of your network by combining statistics for each source network destination network and source and destination port The Fast Network 10 MIB Reference Guide c...

Страница 64: ...lization and in some cases indicate faulty equipment or cabling The number of packets received from the port The packets are broken down into the following categories by type of destination address Kn...

Страница 65: ...that were forwarded The total number of packets transmitted to the LAN The packets are broken down into the following categories by type of destination address Known individual destination address Un...

Страница 66: ...on the network The number of seconds since receiving a packet from the device with a specific address The number of seconds since transmitting a packet to the device with a specific address The numbe...

Страница 67: ...ith Station A s address as source address match Number of packets sent from Segment A to Station B Configure pseudo source filter on port A with Station B s address as destination address match Refer...

Страница 68: ...ssed with no errors snmpInGetNexts The total number of SNMP SetRequest PDUs received by the FN10 which have been processed with no errors snmpInSetRequests The total number of SNMP PDUs created by the...

Страница 69: ...us The status command displays the status of the FN10 and automatically pages through the status of all of the Ethernet ports pausing at each screen of information At the LCM prompt 1 Type status LCM...

Страница 70: ...bank TigerSwitch software Tue 08 23 94 15 03 09 Power up test failures none Current unit temperature is normal System Up Time 2 25 57 Current Number of Learned Addresses 133 Number of Defined Filters...

Страница 71: ...ss reserved by 802 1d but not yet assigned All LANs the addresses reserved by 802 1d for network management Port number Age in seconds since a packet was last received from that address Number of pack...

Страница 72: ...splay 02 04 06 03 2a 43 LCM would display the following information You can display a range of addresses by using a net mask This is helpful when determining the status associated with stations contai...

Страница 73: ...lons This option is helpful if your network includes Token Ring or FDDI along with Ethernet The ipaddr command displays the IP addresses subnet masks and MAC addresses of all FN10 ports At the LCM pro...

Страница 74: ...4 MANAGING THE FN10 Managing the FN10 consists of Disabling and enabling Ethernet ports Changing a subnet mask Changing a community name Setting the baud rate of your terminal connection Setting a reb...

Страница 75: ...example after you have determined that there is faulty equipment Disabling a port effectively stops all bridging functions for that port Disabled ports do not accept SNMP packets and therefore cannot...

Страница 76: ...urrent routing table This table includes the networks it knows about the next hop and the number of hops to get there RIP enables you to use an NMS to remotely manage the FN10 through a router CAUTION...

Страница 77: ...0 you are managing at the LCM prompt 1 Type ipaddr LCM displays the current IP address table for example To change the subnet mask at the LCM prompt 1 Type ipaddr PORT NUMBER IP ADDRESS SUBNET MASK Fo...

Страница 78: ...me at the LCM prompt 1 Type community 2 Enter the old community name If one has not been assigned you do not need to enter anything LCM prompts you for the new community name 3 Enter the new community...

Страница 79: ...e LCM prompt 1 Type baud baud rate For example baud 9600 would set the baud rate to 9600 LCM responds 4 5 6 Setting a Reboot Time You can enter the number of seconds the FN10 waits before rebooting At...

Страница 80: ...Chapter 4 Monitoring and Managing Your FN10 Page 4 20 Fast Network 10 User Guide...

Страница 81: ...ic patterns to help determine optimum network design Monitoring potential security threats Evaluating security policies You can configure the FN10 to selectively filter network traffic using the follo...

Страница 82: ...ilters using the Local Console Manager LCM Table 5 1 Representation of an Internal Bridge Address Table Entry MAC address Port segment Age Source filter Multicast source filter 00 01 02 03 04 05 3 26...

Страница 83: ...flag is set to ON all packets originating from the designated MAC address are filtered This enables the FN10 to recognize and ignore local traffic Local traffic refers to data packets that only need...

Страница 84: ...roups you could configure a destination address filter for the broadcast address i e ff ff ff ff ff ff as follows Source Port 1 then forward to Port 2 Source Port 2 then forward to Port 1 Source Port...

Страница 85: ...estination address is XYZ The FN10 allows you to implement up to 100 Port filters total for all connected ports The various types of filtering conditions that can be specified are referred to as field...

Страница 86: ...eet the filtering criteria The FN10 does not actually block any traffic The pseudo filter option provides unique traffic monitoring capability including Determining the effect a particular filter woul...

Страница 87: ...n the port or Exit apply the filter before transmitting the packet from the port Entry Port Group Match Either NA not applicable True filter the packet if the receiving port or group number matches or...

Страница 88: ...gle source address enter that address here Destinati on Range End Ending MAC address for the destination range of MAC addresses Destinati on Range Mask MAC address mask to apply to the range of destin...

Страница 89: ...in is SR then the offset is relative to the end of the MAC header including the Source Routing SR header if present Field Value The two digit hexadecimal value of each of the eight octets beginning at...

Страница 90: ...ng access to specific stations you can use filters to restrict access to specific stations on the network Preventing access by unauthorized users you can use filters to restrict individual workstation...

Страница 91: ...urposes Fast Network 10 User Guide Page 5 11 Figure 5 1 Using Filters to Restrict Access to an Adjoining Network Segment FN10 Engineering Subnet LAN 2 Accounting Subnet LAN 3 Manufacturing Subnet LAN...

Страница 92: ...LAN 3 to LAN 2 Each filter includes The source LAN or port number The destination port Match flags The filters are constructed as follows Filter 1 Identifier is port 3 as a destination i e exit Field...

Страница 93: ...and H on LAN 2 Figure 5 2 Using Filters to Restrict Access to Specific Stations In this example a Port filter is configured that instructs the FN10 to discard data packets whose destination address i...

Страница 94: ...rating three basic concepts concerning filters Even though a FN10 is used to join network segments it can also be used to block selected traffic or all traffic if desired between joined segments The b...

Страница 95: ...source address is the address of an authorized user on either workstation B C or D of LAN 1 The Port filter s components are Source addresses of authorized users Destination addresses which identify...

Страница 96: ...mance is referred to as a firewall filter Examples of poor network performance that can be controlled by firewall filters include Unnecessary traffic Broadcast storms Conflicting applications that occ...

Страница 97: ...ending AppleTalk I multicasts to LANs 2 and 3 yet allow AppleTalk I multicasts to be sent from LAN 1 to LAN 4 The filter described is a firewall filter it acts as a barrier to protect the network from...

Страница 98: ...ier port number of the port attached to LAN 3 as a destination i e exit Filter fields protocol type AppleTalk I match source LAN LAN 1 match destination address match This filter blocks AppleTalk I mu...

Страница 99: ...M display would look something like the example shown below Your actual display depends on how you have configured your Port filter See Table 5 2 for information on the configurable fields Port Number...

Страница 100: ...eed to enter anything if the filter is to be pseudo If you want the filter to be a real filter type False 5 Select whether the filter will use a range of source MAC addresses NA is the default meaning...

Страница 101: ...range 12 Enter the destination range MAC address mask 13 Select whether the filter will use a protocol match NA is the default You do not need to enter anything unless you are using a protocol match...

Страница 102: ...to save it Enter y Yes to save the filter or n No to cancel it If you save the filter it is redisplayed 5 5 1 Modifying a Port Filter You modify a Port filter in much the same way as you add one LCM...

Страница 103: ...ould be filtered Therefore the processing that takes place on filters can exact a toll on FN10 throughput or forwarding performance Typically if you are using Bridge Address Table filters or a small n...

Страница 104: ...Chapter 5 FN10 Filters Page 5 24 Fast Network 10 User Guide...

Страница 105: ...m is powered up or reset Local and remote loopback tests on any of the FN10 s 24 Ethernet ports All tests can be performed locally or remotely using an in band or out of band Network Management System...

Страница 106: ...equence is complete In addition the Port Link LEDs will turn on for those ports with good links and the Segment Status LEDs will turn on or flash when the selected status condition is present 6 1 2 Sp...

Страница 107: ...cally uses its backup version of the parameters 6 1 4 Power up Diagnostics Results After completion of the power up diagnostic sequence both the Power Pwr and Ready LEDs located on the front panel of...

Страница 108: ...es of tests normal operation is indicated when generated packets are received back without errors For remote loopback tests the FN10 creates LLC Type 1 test packets for LANs and Point to Point Protoco...

Страница 109: ...Link 2 3 1 4 5 6 7 8 9 10 11 12 A B Usr Segment Status Select TX RX Act Col Reset Ready NMS Port Pwr FN10 24 Port Link LEDs 1 2 3 4 5 6 7 11 10 8 9 13 14 15 16 17 18 19 23 24 22 21 20 Link Select TX R...

Страница 110: ...y on all ports On Indicates you are monitoring Receive RX activity on all ports On Indicates you are monitoring Transmit TX and Receive RX activity on all ports On Indicates you are monitoring packet...

Страница 111: ...ot power up contact Cabletron Systems Technical Support Refer to Section 1 2 for more information 6 5 2 Connectivity Problems Check for LED abnormalities Check port status using LCM Check for loose po...

Страница 112: ...M ident command to check the FN10 diagnostic codes and call your authorized Cabletron Systems representative 6 5 4 FN10 Does Not Respond to NMS Check the port status using LCM Check to see if the Span...

Страница 113: ...t ports MDI X 2 RJ45 Fast Ethernet ports FE option 1 AUI D type 15 pin female port 1 RS232C D type 9 pin female port using Point to Point PPP or Local Console Manager LCM 2 optional Fast Ethernet Fibe...

Страница 114: ...2 EIA RS232C DTE to DCE Interface Specification EIA RS 310 C Rack mount Specification Address Table Size 8 192 dynamic learned entries Management Support MIB II 802 1d 802 3 and SMC Enterprise MIB Cab...

Страница 115: ...red wires For example one wire in the pair might be red and the other wire red with white stripes Connectors Refer to the diagram below and note how the pins are numbered Be sure to hold the connector...

Страница 116: ...ly one of the ports has an internal crossover the two pairs of wires must be straight through as shown in Table A 2 a The and signs are used to represent the polarity of the two wires that make up eac...

Страница 117: ...two nodes i e PCs or other stations on the network there can be Up to five segments in series Up to four repeaters or multi port hubs Up to three populated segments that is segments attached to two or...

Страница 118: ...Appendix A Technical Specifications Page A 6 Fast Network 10 User Guide...

Страница 119: ...e information to perform relatively simple filtering operations agent Network management software that runs within a managed network device alarm See trap ANSI American National Standards Institute On...

Страница 120: ...protocol data unit A data unit transmitted as part of the IEEE 802 1d Spanning Tree Protocol The exchange of BPDUs allows bridges within a network to logically configure the network as a single spann...

Страница 121: ...t of a data collision data link layer Layer 2 in the OSI model Defines frame construction addressing error detection and other services to higher layers datagram Abbreviated and connectionless single...

Страница 122: ...other medium entity An active element within an Open Systems Interconnection OSI network layer or sublayer extended LAN A collection of LANs interconnected by protocol independent bridges or switches...

Страница 123: ...EEE 802 3 802 4 802 5 and other LAN WAN protocols IEEE 802 3 The physical layer standard that uses the CSMA CD access method on a bus topology LAN IEEE 802 6 Standard for metropolitan area networks MA...

Страница 124: ...a network A network that interconnects a variety of devices computers printers servers and so on within a limited geographical area A LAN typically connects devices within a building or campus link lo...

Страница 125: ...ific device that can be accessed via a network management protocol The FN10 has its own MIB multicast Packets destined for more than one address multicast broadcast storm Excessive multicast packet tr...

Страница 126: ...SI model physical layer Layer 1 of the OSI model Defines and handles the electrical and physical connections between systems power budget The difference between transmit power and receiver sensitivity...

Страница 127: ...ork management system and a network device source address filtering A switch or bridge function that forwards or rejects data depending on the data s source address static address Addresses manually e...

Страница 128: ...a between LANs that use different protocols translation Modification of data packets from one type of network so they can be used on a different type of network e g Ethernet to FDDI translation trap A...

Страница 129: ...playing 4 19 for ASCII terminal 2 7 setting 4 18 big endian 4 13 BPDU Bridge Protocol Data Unit 3 5 Bridge Address Table defined 1 9 Bridge Protocol Data Unit BPDU 3 5 bridging functions disabling 3 6...

Страница 130: ...ging of 4 14 power up diagnostics 6 1 sample applications 1 11 1 12 specifications A 1 statistics 4 2 field mask 5 9 field match 5 8 field origin IP 5 8 MAC 5 8 SR 5 8 Figure 1 12 filter index 5 9 fil...

Страница 131: ...storm protection defined 3 16 MIB variables 3 16 N non volatile memory 6 3 noRIP option 4 17 O operational diagnostics 6 3 OSI Reference Model 1 7 P performance enhancing with filters 5 16 pin assignm...

Страница 132: ...ight through wiring A 4 subnet mask IP changing 3 4 4 17 syntax LCM command 1 16 system contact defined 3 17 system location defined 3 17 system name defined 3 17 system statistics 4 3 T test packets...

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