Cabletron Systems Fast Network 10 User Manual Download

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Using Filters for Security Purposes

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 1

Concentrator

Summary of Contents for Fast Network 10

Page 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...

Page 2: ......

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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