Cabletron Systems Ethernet Hubs Скачать руководство пользователя страница 118 | Manualshive

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9030367 E7

1

Index

Symbols

% Collisions

6-3

% Errors

6-3

A

Access

4-16

Permissions

4-16

Accessing the

Hub

Configuration View

4-1

Device View

2-1

Performance View

6-2

Active Users

6-3

Additional

Bridge Information

Button

4-18

View

4-18

Configuration Button

4-15

Additional Configuration

4-6

Address

Delete View

4-13

Button

4-13

Display View

4-13

Administrative State

6-15

,

6-16

,

6-17

Alarm

Messages

7-1

Alarms

Button

5-3

,

5-5

,

6-5

Log View

5-2

View

5-5

,

6-5

Alignment

4-11

,

6-4

Errors

6-4

Apply Button

2-14

Audible Alarm

4-10

AUI

4-4

,

4-21

BrdgFiber_Off

4-4

BridgeFiber_Rptr

4-4

Off

Fiber_Brdg

4-4

Fiber_Rptr

4-4

Rptr

Fiber_Brdg

4-4

Fiber_Off

4-4

Available Circuits

4-11

B

Banner

6-3

,

6-13

Bar Gauge

6-6

Bd/Port Combination

4-12

Board

Member

4-13

Number

4-7

Port Instance

4-12

,

4-25

Bridge

Configuration View

4-17

ID

4-19

Information

4-2

,

4-5

Button

4-18

View

4-18

Location

4-18

Name

4-17

Priority

4-19

Restart

4-21

Settings

4-21

Status Control

4-21

Type

4-17

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Содержание Ethernet Hubs

Страница 1: ...Cabletron Ethernet Hubs Management Module Guide...

Страница 2: ...nti virus system is 100 reliable we strongly caution you to write protect and then verify that the Licensed Software prior to installing it is virus free with an anti virus system in which you have co...

Страница 3: ...ich it was acquired is inoperative 3 Reproduced for safekeeping archives or backup purposes 4 Modified adapted or combined with other computer software provided that the modified combined or adapted p...

Страница 4: ...s in this Chapter 2 1 Accessing the Device View 2 1 Ethernet Hubs Device View Description 2 2 Device View Banner 2 4 MMAC Device Panel 2 5 MMAC Device Statistics Panel 2 7 Logical MIM Representation 2...

Страница 5: ...up View 3 7 IRBM MMAC Bridge Database View 3 10 Acquired Database 3 10 Permanent Database 3 11 UPS Statistics View 3 12 Chapter 4 Configuration Views What is in this Chapter 4 1 Accessing the Configur...

Страница 6: ...vice Performance View 6 2 IRBM IRM2 IRM3 and MiniMMAC Hubs 6 3 SIRM and MRXI Hubs 6 6 MIM Performance View 6 6 IRBM IRM2 IRM3 and MiniMMAC Hubs 6 7 SIRM and MRXI Hubs 6 10 HASPART Panel 6 11 Port Perf...

Страница 7: ...Cabletron Ethernet Hubs vi Management Module Guide...

Страница 8: ...11 Figure 2 6 Logical MIM Representation of MiniMMAC Device View 2 12 Figure 2 7 Physical MIM Representation of IRM2 IRM3 and IRBM Device Views 2 16 Figure 2 8 Physical MIM Representation of MiniMMAC...

Страница 9: ...Cabletron Ethernet Hubs viii Management Module Guide...

Страница 10: ...t Database Table 3 12 Chapter 4 Configuration Views Table 4 1 MMAC Source Address Board Port Location View Fields 4 7 Table 4 2 Error Source Table Fields 4 11 Table 4 3 MMAC Redundancy Information Vie...

Страница 11: ...Configure Alarms View Fields 6 9 Table 6 6 SIRM and MRXI MIM Configure Alarms View Fields 6 10 Table 6 7 Port Configuration View Field Definitions 6 15 Table 6 8 Port Configure Alarms View Field Defin...

Страница 12: ...Cabletron Ethernet Hubs management module and model types Chapter 2 Device Views Describes the Device Views available for each Cabletron Ethernet Hub model type Chapter 3 Application Views Describes t...

Страница 13: ...PECTRUM Report Generator User s Guide SPECTRUM Application View Reference Guide Getting Started with SPECTRUM for Operators Getting Started with SPECTRUM for Administators How to Manage Your Network w...

Страница 14: ...st Road East French s Forest NSW 2086 Sydney Australia E mail spectrum support ctron com 61 2 950 5950 61 2 950 5900 Japan Cabletron Systems KK JTB Building 9F 164 Maranouchi Chiyoda ku Tokyo 100 Japa...

Страница 15: ...Getting Help Preface Cabletron Ethernet Hubs xiv Management Module Guide...

Страница 16: ...s actions and associations for device models in SPECTRUM Cabletron Ethernet Hubs Management Module The SPECTRUM Ethernet Hubs Management Module manages the Cabletron Ethernet Hub family of devices by...

Страница 17: ...ntelligent repeater module managed through SNMP only Hub_CSI_MiniM A MiniMMAC intelligent repeater module managed through SNMP only NOTE If you have installed both the Hub_CSI_MRXi Cabletron Ethernet...

Страница 18: ...e purposes of this guide the term MIM will represent all MIMs that can be installed in a Cabletron hub Intelligent MIMs MIMs that provide network management functions and network media interfacing Non...

Страница 19: ...Terminology Introduction Cabletron Ethernet Hubs 1 4 Management Module Guide...

Страница 20: ...ews and monitor hub performance It also points out differences in the Device Views of various Cabletron hubs Accessing the Device View You can access the Device View using one of the following methods...

Страница 21: ...Ds The Device View also provides you with menu bar access to the views that monitor and control the hub the hub modules and each module port The Device View shows an actual representation of the hub c...

Страница 22: ...x00400000 VNM Host IRBM Hub of type Hub_CSI_IRBM Model Name Contact Description Location Network Address System UpTime Manufacturer DeviceType Serial Number 3 1 MT8 ON 165 IRBM Hub 2 ON 180 3 ON 256 4...

Страница 23: ...p Time The time the device has been active without failure displayed in the following format days hours minutes seconds Contact The textual identification and contact information of the person respons...

Страница 24: ...in the following format days hours minutes seconds The colored rectangle that appears around these fields displays the device contact status For a list of device contact status colors refer to Table...

Страница 25: ...packets detected by the module or port CRC_Errors Indicates packets with bad Cyclical Redundancy Checks CRCs received by the module or port Runts Indicates runt packets received by the module or port...

Страница 26: ...ample of the MMAC Device Statistics Panel Figure 2 3 MMAC Device Statistics Panel Three buttons are available on the MMAC Device Statistics Panel These buttons allow you to change the statistical pres...

Страница 27: ...ort status labels and double click zones that provide access to information on each module installed in the hub The logical MIM representation also provides several double click zones that function as...

Страница 28: ...Chapter6 You can also access several generic views from the View and Device Menu pulldown menus These generic views include Configuration View Performance View Diagnostic View Application View Display...

Страница 29: ...st IRM 3 Hub 2 of type Hub_CSI_IRM3 Model Name Contact Description Location Network Address System UpTime Manufacturer DeviceType Serial Number 1 1 IRM3 ON 0 2 OFF 0 3 1 THIN SEG 0 IRM 3 Hub 2 IRM 3 H...

Страница 30: ...M Host IRBM Hub of type Hub_CSI_IRBM Model Name Contact Description Location Network Address System UpTime Manufacturer DeviceType Serial Number 1 MT8 ON 2 ON 3 ON 4 ON 5 ON 6 ON 7 ON 8 ON 1 MT8 ON 2...

Страница 31: ...me Manufacturer DeviceType Serial Number MiniMMAC Device Panel My Office Location Name MiniMMAC Hub Logical Gauges Frames Gauge Mode Percentage Network Address DeviceType System UpTime 132 177 118 24...

Страница 32: ...tribute displayed on the Logical Interface Icon s Gauge The label changes color to reflect the attribute selected Refer to Table 4 1 for a list of the attribute definitions Gauge Mode This area of the...

Страница 33: ...uge Control Panel Apply the Selected Attribute selection s to the Port Performance label The settings cannot be saved Save the current settings while running SpectroGRAPH Reset back to the last Keep S...

Страница 34: ...he hub shows each of the modules installed in the hub along with the current LED status conditions on or off The Physical MIM Representation gives you the same access to generic views as the Logical M...

Страница 35: ...ption Location Network Address System UpTime Manufacturer DeviceType Serial Number MMAC Device Panel My Office Location Name IRBM Hub Logical Gauges Frames Gauge Mode Percentage Network Address Device...

Страница 36: ...anufacturer DeviceType Serial Number MiniMMAC Device Panel My Office Location Name MiniMMAC Hub Logical Gauges Frames Gauge Mode Percentage Network Address DeviceType System UpTime 132 177 118 24 Hub_...

Страница 37: ...w from the Icon Subviews menu The Port Source Address View displays the following information Name The user defined or default name for the hub Network Address The IP address of the hub Device Type Th...

Страница 38: ...at the SIRM network management software is on line and functional The SIRM modules also contain an RCV and POK LED that are associated with its repeater port and its network management port IRM2 Hubs...

Страница 39: ...at the other end of the fiber optic link segment IRM3 Hubs The IRM3 supports LEDs that represent operating status collision rates error rates packets transmitted and packets received for the entire hu...

Страница 40: ...et is associated with the IRBM s bridging functions The repeater set has the same functions as the LEDs described for the IRM2 The bridging set of LEDs is as follows ON On Line This LED is located at...

Страница 41: ...ket on that segment COLLISION This LED indicates that a collision is occurring on a system level MGMT Management When flashing this LED indicates that the MRXI s network management software is receivi...

Страница 42: ...for changing MIM representations Changing MIM Representations on the Entire Hub To change the representation of the entire hub Device View follow these steps 1 Within the hub Device View pull down th...

Страница 43: ...nce of the selected module changes A selected single module appears to extend from the hub chassis 3 Double click the left mouse button again to return the module to its original appearance NOTE This...

Страница 44: ...increasingly detailed views of network information and table entries within views that provide you with double click zones that navigate to device specific information views Accessing the Application...

Страница 45: ...e is connected to other devices you can access additional attribute information for the connected devices through the Application View HASPART Panel The following sections describe the Application Vie...

Страница 46: ...e e g 132 177 118 24 This button provides access to the SNMP System Group View which is described later in this chapter This button provides access to the SNMP User Datagram Protocol UDP Group View wh...

Страница 47: ...ew provides the following information System Descriptor A textual description of the hub This description includes the name of the hardware type and the networking software System Up Time The time sin...

Страница 48: ...but disallowed because the Don t Fragment flag was set Time Exceeds Displays the total number of ICMP Time Exceeded messages received or transmitted by the hub This indicates that an IP datagram was d...

Страница 49: ...p Requests test the network time delay between devices TimeStamp Reply Displays the total number of times the hub received ICMP TimeStamp Reply messages from a network device to which it transmitted a...

Страница 50: ...al number of received datagrams discarded due to invalid addresses in the IP header s destination field If the hub is not acting as a gateway this field includes datagrams discarded because the destin...

Страница 51: ...iew Table 3 3 provides the information displayed by the IP Route Table Information View IP Add Table Table 3 2 IP Address Table Information View Fields Field Definition IP Address The IP address of th...

Страница 52: ...ion View Fields Continued Field Definition More IP Stats Table 3 4 SNMP IP Group View Information Field Definition Out Packets Displays the total number of transmission requests from the local IP netw...

Страница 53: ...se by you or the network manager Static Entry Age Lmt The length of time allowed for a static entry in the acquired database to be inactive before it is dropped from the database This time is fixed at...

Страница 54: ...h you can enter a new source address and a button that allows you to select filtering To add a new source address to the database type the address into the New Source Address field below the Acquired...

Страница 55: ...ce address to the database type the address into the New Source Address field below the Permanent Database Table This button allows you to access an IRBM MMAC Filter Selection View that lets you updat...

Страница 56: ...y The current battery capacity of the UPS Values are displayed as a percentage Additional fields show the Average and the Peak Value of this quantity Battery Volts Out The battery output voltage Addit...

Страница 57: ...ect the current status of the device This button allows you to view historical data on UPS performance Click on this button to set the viewing area of the graph to begin at a specified date and time T...

Страница 58: ...easingly detailed views of network information Table entries within views provide you with double click zones to navigate to device specific Information Views Accessing the Configuration View You can...

Страница 59: ...ware configuration Depending on the device other configuration information may be available in this view The Configuration View for Cabletron Ethernet Hubs is divided into two sections Model Configura...

Страница 60: ...ds The maximum number of board models allowed in the pulled board list This button allows you to disable SpectroSERVER polls of a device by setting Polling Status to False This button is useful in dis...

Страница 61: ...le in the MRXI or the MiniMMAC Configuration Views This button allows you to select the state of operation of AUI and Fiber ports on the device This button is not available in the IRM MRXI or MiniMMAC...

Страница 62: ...cribed later in this chapter This button is not available in the IRM or the MRXI Configuration Views This button allows you to access the Device Source Address Table which is described later in this c...

Страница 63: ...only in the IRM2 and IRM3 Configuration Views Source Address View You can access the Source Address View by clicking on the Find Source Address button in the Configuration View This view gives you the...

Страница 64: ...e hub System Up Time The time the hub has been active without failure The time is displayed in the following format days hours minutes seconds Control View You can access the Control View by clicking...

Страница 65: ...rol Views Source Address Age Time The number of seconds that a source address is not detected before it is removed from the source address table This field does not appear in the IRM or MRXI Control V...

Страница 66: ...me The ASCII name of the device read from the device firmware Network Address The network IP address e g 132 177 118 24 This button allows you to Enable or Disable detection of Traffic Alarms Traffic...

Страница 67: ...2 and IRM3 Configure Alarms Views Time Base The number of seconds used as the interval for performing all of the rate alarm checks The minimum is 10 seconds For example if the time base is 10 seconds...

Страница 68: ...ault name of the model Device Name An ASCII name of the device that this agent manages Maximum Circuits The maximum number of circuits Available Circuits The number of available circuits This field do...

Страница 69: ...nt Circuits Redundancy Table Table 4 3 MMAC Redundancy Information View Fields Field Definition Circuit Name The name of the indicated circuit Retry Count The number of unanswered polls allowed for th...

Страница 70: ...4 provides the information contained in the view The IRM2 MRXI and MiniMMAC Address Delete Views allow you to double click on the Polled Addresses in the Redundancy Table to access an Address Display...

Страница 71: ...presently in flash memory Flash Size in Bytes The size in bytes of the flash memory contained in the module Flash Count The number of times that the flash memory has been reprogrammed This value is i...

Страница 72: ...View specific to the selected table entry This view allows you to modify the statistics and parameters for the device Table 4 7 provides definitions of the Community Table Detail View The Community a...

Страница 73: ...access the Community and Trap Table View and all subviews Without superuser access you cannot access or change any of the information displayed in this view Table 4 7 Community Table Detail View Fiel...

Страница 74: ...wing information Model Name The user defined or default model name Network Address The network IP address e g 132 177 118 24 Community Name The Community Name that has been assigned locally to the hub...

Страница 75: ...des the information contained in the view This button allows you to access the Additional Bridge Information View Table 4 9 provides the information contained in the view Bridge Root Information Table...

Страница 76: ...arded Trap Type Obj ID Contains the object identifier of the first VarBinding in the last trap generated by the bridge Bridge Setup Information Table 4 10 Setup Information View Fields Field Definitio...

Страница 77: ...Count The number of times the bridge s Topology Change Flag has been changed since the bridge was powered up or initialized Fwd Dly Hello Information Table 4 12 Forward Delay Hello Information View F...

Страница 78: ...le connections can use any valid cable type including thin net coaxial fiber optic or AUI The terminating connectors used depend on the type of cable connecting the module ports Any two or more cable...

Страница 79: ...rnative module port if a problem exists on the primary port Although circuit connections typically occur between devices in the same room the circuit connections can also occur over longer distances b...

Страница 80: ...ompany These departments are on the same floor and have two repeaters between them on an Ethernet network Suppose a system overload occurred IRB S ON ST RC DN CR PO ON RH NK DN CR PO NS LK A ETHE C O...

Страница 81: ...y also be used to configure multiple secondary hub devices To set redundant circuits for the devices modeled in SPECTRUM follow these steps 1 Click on the icon to select it 2 If contact has been estab...

Страница 82: ...nnection is on port 4 of a module in the device s fifth slot the Board Port Instance would be 5 4 Modules on these devices start from 1 and can go up to 8 depending on the MMAC type 8 Change the Port...

Страница 83: ...Hub Redundancy Management Setting Redundant Circuits Configuration Views Cabletron Ethernet Hubs 4 26 Management Module Guide...

Страница 84: ...a network segment Each error attribute is summarized over two intervals the Total number counted since the device was powered on and the Last Poll which is the number counted since the last poll Acce...

Страница 85: ...detailed views of network information to select a graphical representation for the error attributes and to bring up the Events and Alarms Log Views NOTE There is no Diagnostic View for the IRBM IRM2...

Страница 86: ...ng SIRM MMAC Hub Collisions The graph has a scroll bar that allows you to view the history of the hub collision statistics The bottom axis of the graph shows the time in seconds broken into five minut...

Страница 87: ...tton allows you to access a graph showing MRXI Hub Receive Collisions The graph has a scroll bar that allows you to view the history of the hub collision statistics The bottom axis of the graph shows...

Страница 88: ...g a list of network events specific to the hub You can scroll through the Event Log using the menu or the scroll bars This button displays the MRXI MMAC Alarms View The Alarms View displays a list of...

Страница 89: ...Diagnostic View Description MRXI Hubs Diagnostic Views Cabletron Ethernet Hubs 5 6 Management Module Guide...

Страница 90: ...b chassis The Port Performance View for Cabletron Ethernet hubs displays network statistics and information for individual ports on a MIM board These views summarize traffic flow in bytes and packets...

Страница 91: ...View You can access the Device Performance View using one of the following methods refer to Figure Double click on the Performance View label of the icon Highlight the icon and select Performance from...

Страница 92: ...ation view containing the device Network Address The network IP address of the device Device Type The SPECTRUM Model Type e g Hub_CSI_IRBM System Up Time The time displayed in days hours minutes secon...

Страница 93: ...ttributes in the pie chart since the buffer was cleared For more information on how these pie charts display network attributes refer to the SPECTRUM Operator s Reference The Detail button is not avai...

Страница 94: ...istics for two days ago This button allows you to change how time is measured on the line graph in the hub Performance View You can choose to display statistics in time blocks ranging from 1 to 100 ho...

Страница 95: ...ou view the recent hub performance statistics The bottom axis of the graph shows the time in seconds broken into 5 minute intervals The right axis shows the rate of packets received during the last po...

Страница 96: ...ocation The location of the device as entered in the Creation dialog box when the model was created If no location has been specified this field displays the model name of the SPECTRUM location view c...

Страница 97: ...r of frames grouped according to their size in bytes The Protocol pie chart shows the number of frames per protocol type This button allows you to view historical data related to module performance Fo...

Страница 98: ...IRM3 IRBM and MiniMMAC Configure Alarms View Fields Field Description Model Name The user defined or default name of the module model MIM Name The name of the module device Slot Number The number of...

Страница 99: ...he MIM Standard Statistics View displays two bar gauges at the bottom of the view displaying information on Packets and Collisions The right box green number and the bar gauge show the number of packe...

Страница 100: ...Port Performance Views from the DevTop View or the Device View Device View Access Method There are three ways to access the Port Performance View from the Device View To display a Port Performance Vie...

Страница 101: ...View from the DevTop View follow these steps 1 Double click on a module in the Simplified Device Panel One or more port representations appear in the Port Connections Panel 2 Double click on either o...

Страница 102: ...ocation view containing the device Network Address The network IP address of the device Device Type The SPECTRUM Model Type e g Hub_CSI_IRBM System Up Time The time displayed in days hours minutes sec...

Страница 103: ...ys ago you can view port performance statistics for two days ago This button lets you change how time is measured on the line graph in the Port Performance View You can choose to display statistics in...

Страница 104: ...Definition Model Name The user defined or default name of the model Network Address The network IP address e g 132 177 118 24 MIM Port Number The board number and port number in the format 1 1 MIM or...

Страница 105: ...tus The network state of this port Port Link Status The state of the link signal for this port Port Admin State The administrative state of this port off or on This button allows you to display the Et...

Страница 106: ...rnet Port Standard Statistics View Field Definitions Field Definition Model Name The user defined or default name of the model Network Address The network IP address e g 134 141 256 145 MIM Port Numbe...

Страница 107: ...ast reset The white number is the total number the green number and the horizontal bar gauge are the number since the last poll The button opens a view that displays a graph showing the rate of change...

Страница 108: ...Time Base that will cause a traffic alarm Collisions Alarms Enables or disables the sending of port level collision alarms Collisions Threshold The number of collisions per good packet measured by the...

Страница 109: ...Port Performance View MRXI Hub Performance Views Cabletron Ethernet Hubs 6 20 Management Module Guide...

Страница 110: ...d messages are translated as SPECTRUM events and displayed in the Event Log For more information on specific SNMP traps refer to RFC 1213 available through the Internet system Also refer to the Manage...

Страница 111: ...odel created is not the same type as the device Model type v Name v User v 00010203 The model created is not the same type as the device 00010306 A n v device named v has been cold started 00010306 No...

Страница 112: ...ented 00010602 Port v Instance ID v on board in slot v Instance ID v of v name v is no longer segmented 00010602 Not Applicable 00010603 Network configuration change reported by v name v MAU attached...

Страница 113: ...nstance ID v on board in slot v Instance ID v has failed polling Redundancy activated for Circuit v Instance ID v 00010609 An active port in a redundant circuit has failed polling This indicates the a...

Страница 114: ...seconds exceeded on board in slot v of v name v 0001060f This trap is generated when the traffic good packets per time interval has been exceeded for a particular MIM 00010610 Error threshold exceede...

Страница 115: ...t 00010615 Port type changed Port v Instance ID v on board in slot v Instance ID v of v name v is now type v Instance ID v 00010615 A port has been changed from a station port to a link port or vice v...

Страница 116: ...tage has returned to a normal state has been detected by v name v 0001061d Not Applicable 0001061e A fan in the system s chassis is operating at an abnormal RPM rate has been detected by v name v 0001...

Страница 117: ...twork configuration changes reported by v name v v name v status is now v Instance ID v 00010625 Not Applicable 00010626 Device configuration change reported by v name v Acquired database of v name v...

Страница 118: ...6 17 Alarm Messages 7 1 Alarms Button 5 3 5 5 6 5 Log View 5 2 View 5 5 6 5 Alignment 4 11 6 4 Errors 6 4 Apply Button 2 14 Audible Alarm 4 10 AUI 4 4 4 21 BrdgFiber_Off 4 4 BridgeFiber_Rptr 4 4 Off F...

Страница 119: ...on Information 4 2 View 4 1 Contact 2 4 Control Button 4 5 4 21 Conventions xii Counters 4 8 CRC 4 11 6 4 Errors 6 4 Cs Files CsEvFormat 7 2 CsPCause 7 2 Current Bridge Status 4 21 Date 4 4 Time 4 4 C...

Страница 120: ...elay 4 20 Hello Information View 4 20 Parm 4 20 Frame Breakdown 6 4 Button 6 5 Rate 6 3 6 13 Size Pie Chart 6 5 6 8 6 14 Fwd Dly Hello Information Button 4 20 G Gauge Control Panel 2 13 Mode 2 13 Type...

Страница 121: ...7 6 18 MiniMMAC 4 21 6 3 6 13 MMAC Redundancy Information View 4 12 Table 4 12 View 4 5 Type 4 4 MMAC3 4 4 MMAC5 4 4 MMAC8 4 4 Model 1 1 Configuration 4 2 4 3 4 17 Name 2 4 4 3 4 6 4 7 4 9 4 11 4 14 4...

Страница 122: ...6 17 6 18 Performance View 6 11 6 12 Status 6 15 6 16 6 17 Topology Type 6 15 Ports On Out Of 4 4 Preface xi Primary 4 21 Circuit 4 24 Pathway 4 22 Port 4 22 PROM Revision 4 4 Protocol Max Age 4 19 P...

Страница 123: ...le Alarm 4 10 Source Addr Lock 4 8 Traps 4 8 Address 4 6 4 7 4 8 Table 4 8 Button 4 5 SPECTRUM Events 7 1 Src Addr Age Time 4 8 STA Protocol 4 19 Station 6 15 Suggestions xiii Superuser 4 16 Support x...

Страница 124: ...ndex 7 T continued Trap 4 8 4 16 Generation 4 16 Host 4 16 Type Obj ID 4 19 Trunk 6 15 Type of Filtering 4 19 U Unsolicited Messages 7 1 V Virus Disclaimer i VNM Database 4 2 W X Y Z No entries for th...

Страница 125: ...Index Cabletron Ethernet Hubs 8 Management Module Guide...

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