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manual 34 8260 Multiprotocol Intelligent Switching Hub
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Install
Configuration
Hub Reset Button
Device diagnostics
Procedure Command
∙ Reassembly timeout
Non-Fault Tolerant Mode
∙ Bridge Forward Delay Time
∙ Data enable signal
Phase Jitter
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8260 Multiprotocol Intelligent Switching Hub
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Contents
Multiprotocol Intelligent Switching Hub
Page
Multiprotocol Intelligent Switching Hub
First Edition May
Take Note
Abstract
Iv 8260 Multiprotocol Intelligent Switching Hub
Contents
Intelligent Power Management Subsystem
Chapter Intelligent Cooling Subsystem Ethernet Modules
Configuring the Dual Fiber Repeater Module 188
Jitter Attenuator Daughter Card Jadc
Speed Detection Active Modules 149 Passive Modules
185
Appendix A. Power Requirements for 8250/8260 Modules
Multiprotocol Interconnect Module
Output from Show Community Command
Sample of Hierarchical Structure Command
Backplane Path Display for Ethernet Segments
Forced Termination of Existing DMM Users
Configuring Port Redundancy for 8260 Ethernet Modules
Front View of 10-Port 10Base-FB Module 115
116
135
133 Displaying the Status of Surrogate Features 234 134
182
An Example of Rmon Implementation
228
LMS Ospf System Parameter Panel
LMS Ospf Default RIP Convert Table Panel
LMS Ospf Default Static Convert Table Panel
Tables
Xiv 8260 Multiprotocol Intelligent Switching Hub
Special Notices
AIX
Preface
How This Document is Organized
International Technical Support Organization Publications
How to Order Itso Technical Bulletins Redbooks
Related Publications
Acknowledgments
Xx 8260 Multiprotocol Intelligent Switching Hub
An Overview of the IBM 8260 Hub
Introduction
Multiprotocol Intelligent Switching Hub
8260 Hardware Description
IBM 8260 Model
1.1 8260 Backplane
There are three models 8260-017 8260-010 8260-17A
Payload Area
IBM 8260 Model
Components of the 8250 Adapter Kit
Fault-Tolerant Controller Module Slots
Intelligent Power Subsystem
Distributed Management Architecture
Intelligent Cooling Subsystem
3 8260 Model
1.1 8260 Ethernet 24-Port 10Base-T Module
8260 Modules and Daughter Cards
Ethernet Modules
Token-Ring Modules
Management and Controller Modules
3.4 8260 Token-Ring Media Access Daughter Card T-MAC
3.2 8260 Fault-Tolerant Controller module
Ethernet Media Access Daughter Card E-MAC
12 8260 Multiprotocol Intelligent Switching Hub
Backplane Architecture
LAN Segments on the Backplane
Enhanced TriChannel Bus
Ethernet Segments on the Backplane
ShuntBus
Show Backplanepaths Ethernet
Description Method
∙ Data enable signal
Data in NRZ format
Local collision
Remote Collision
Digital Collision Detection
Analog Collision Detection
Statistics Collection
Token-Ring Segments on the Backplane
SET Module slot.sublsot Network tokenringn
Show Backplanepaths Tokenring
ShuntBus and Token-Ring
Fddi Segments on the Backplane
SET Module slot.sublsot Network FDDIn
An example of the output from this command is shown in on
Network Allocations on the 8260 Backplane
TriChannel Backplane Network Allocation
ShuntBus Backplane Network Allocation
Management Buses
Management LAN Mlan
Serial Control Interface SCI
Management Buses
28 8260 Multiprotocol Intelligent Switching Hub
Fault Tolerant Controller Module
8260 Fault Tolerant Controller Module Overview
Controller Module Front Panel
Front View of the Controller Module
Hub Reset Button
LED Test Button
Controller Module Fault Tolerance
4 8260 Fault Tolerant Controller Module Considerations
34 8260 Multiprotocol Intelligent Switching Hub
Distributed Management Architecture
8260 Distributed Management Architecture
36 8260 Multiprotocol Intelligent Switching Hub
− Configuration
− Statistics and fault reporting
− Out-of-band and in-band downloading
− Snmp support
IP Addressing for DMM
Unpacking and Installing the DMM
Distributed Management Module DMM
DMM LED Indicators
On page 41 shows the meaning of the status LED
Console and Auxiliary Ports
LED
Modems for Connecting Terminals to DMM
Pin # Signal Name
Configuring the DMM
Procedure Command
Configuring DMM Users
Three types of users can be used to access DMM
∙ Administrator
∙ User
8260A show login
Changing Superuser Password
8260A clear login index all
Display of Defined DMM Users
Resetting Superuser Password to Factory Default
Configuring Terminal Settings for DMM
Set terminal console baud
∙ Set Terminal Console
8260A set terminal console mode commandline
Set terminal console mode slip
Set terminal console databits
Set terminal console stopbits
Set ip defaultgateway 9.67.46.2 slip
Set terminal console hangup enable
Set ip ipaddress 9.67.46.1 slip
Set ip ipaddress ff.ff.ff.f0 slip
Configuring DMM Device
8260A set terminal timeout
Show terminal
Set clock 1545 95/1/19 Thursday
− Device diagnostics
∙ Set Device
8260A set device diagnostics disable
8260A set device macaddrorder noncanonical
8260A set device resetmastership enable
8260A set device dipconfiguration disable
8260A set device dipconfiguration enable
8260A set device trapreceiver enable
Configuring DMM IP Parameters
8260A save device
8260A show device
8260A set ip ipaddress 9.67.46.235 tokenring10
8260A set ip defaultgateway 9.67.46.238 tokenring10
8260A set ip activedefaultgateway
8260A show ip
8260A clear ip index
8260A show community
Configuring DMM Snmp Parameters
8260A set community public 9.67.46.45 all
8260A set alert authentication enable
8260A set alert change enable
8260A set alert hello enable
8260A set alert consoledisplay enable
EC-DMM Ethernet Carrier Distributed Management Module
8260A set alert portupdown enabledisablefilter
8260A set port 2.1 alterfilter enabledisable
Installing the EC-DMM
EC-DMM Front Panel
EC-DMM LED Description
Jumpering for the EC-DMM DB-9 Ports
MAC Daughter Cards
Perport
EC-DMM
Configuration E-MAC
Ethernet MAC Daughter Card E-MAC
8260A show module 1.2 verbose
8260A set module 2.2 interface enabledisablestandby
8260A set module 2.2 network ethernet1
Configuring T-MAC
Token-Ring MAC Daughter Card T-MAC
8260A set module 6.2 interface enabledisablestandby
8260A set module 6.2 earlytokenrelease enable disable
8260A set module 6.2 monitorcontention enable disable
8260A set module 6.2 network tokenring10
8260A show module 6.2 verbose
Managing 8260 Using DMM and 8250 xMM
TOKENRING10
Managing 8260 with DMM
Managing 8260 with 8250 xMM
Overview of Management and Control Commands
Sample of Hierarchical Structure Command
72 8260 Multiprotocol Intelligent Switching Hub
Intelligent Power Management Subsystem
Intelligent Power Management Subsystem
Power Class
SET Power Slot slot Class 1 to
Show Power Slot slotall
An example of the output for this command is shown in on
Configuring 8260 Power Supplies
Show HUB
Show Power Budget
Non-Fault Tolerant Mode
Output from Show Power Budget Command
Fault Tolerant Mode
SET Power Mode nonfaulttolerant
SET Power Mode faulttolerant
Load Sharing Power Supplies
Managing Power
Installing 8260 Module in an 8260 Managed by DMM
HUB
Installing 8260 Module in an 8260 Not Managed by DMM
Installing 8250 Module in a Hub Managed by DMM
Installing 8250 Modules in an 8260 Managed by DMM
Installing 8250 Module in a Hub Not Managed by DMM
Controlling Power to the 8260 Modules
Power Management Considerations
SET Power Slot slot Mode enabledisable
∙ Show Hub
Power Management Scenarios
∙ a Power-Supply Failure Scenario
∙ Show Power Mode
∙ a Power Failure Scenario
∙ Power Mode is Automatically Recovered
Installing the 8260 Power Supply
90 8260 Multiprotocol Intelligent Switching Hub
Intelligent Cooling Subsystem
Fan Units
92 8260 Multiprotocol Intelligent Switching Hub
SET Overheatautopowerdown enabledisable
Output from Show Power Mode Command
Cooling Zones and Power Classes
Flow Chart for an Overheat Condition
96 8260 Multiprotocol Intelligent Switching Hub
CSMA/CD
Ethernet Modules
Ethernet LAN Overview
Data Integrity
Ethernet Addressing Mode
Frame Size
8260 Ethernet 24-Port 10Base-T Module
Module Equivalent Distance meters
LED Name Color State Description
Expanded view of the DIP switches is shown in on
Port 10Base-T Module Side View
Network Selection Switch
SET Port slot.port Network network
Configuring the 10Base-T Module
10Base-T Module Usage
SET Port slot.port Mode enabledisable
SET Port slot.port Mode Redundant slot.port
SET Port slot.port Mode NON-REDUNDANT
SET Port slot.port Autopolarity enabledisable
8260 Ethernet 20/40-Port 10Base-T Module
Equivalent Distances for 20/40 10Base-T Modules
Describes the meaning of these LEDs
Front View of 20/40-Port 10Base-T Modules
40-Port 10Base-T Module Side View
40-Port 10Base-T DIP Switches
Configuring the 20/40-Port 10Base-T Modules
SET Port slot.port Network network
SET Port slot.port Linkintegrity enabledisable
SET Port slot.port Squelch normallow
8260 Ethernet 10-Port 10Base-FB Module
Equivalent Distances for Ethernet 10Base-FB Module
LED Name Color State Description
Port 10Base-FB Module Side View
Port 10Base-FB DIP Switches
Configuring the 10Base-FB Module
10Base-FB Module Usage
Configuring Port Redundancy for 8260 Ethernet Modules
SET Port slot.port Highpower enabledisable
10 8260 Ethernet Modules Summary
11 8260 Ethernet Security Daughter Card
Operation of Security Card
Intrusion Protection
Eavesdropping Protection
Configuring the Security Module
8260A set security port 2.15 auto-learning enable
8260A set module 7.2 network ethernet3
8260A show security network ethernet3
8260A set security network ethernet3 auto-learning enable
8260A set security network ethernet3 mode enable
8260A set security network ethernet3 auto-learning disable
Output from this command for our network is shown in Figure
8260A save security addresstable
8260A set security port 2.15 jamming enable
8260A set security port 2.15 intruderchecking enable
8260A set security network ethernet3 intruderjamming enable
An example of the resulting display is shown in Figure
8260A set security port 2.15 failsafe enable
Ring Operation
Token-Ring Support
Token-Ring LAN Overview
Ring Administration
Active Monitor
Ring Errors
Token-Claiming Process
Differential Manchester Coding
Differential Manchester Coding
Clock Recovery
Phase Jitter
8260 Backplane Signalling for TR Segments
Self-Shorting Relays on the ShuntBus
Backplane Signalling for 4 Mbps Operation
Backplane Signalling for 16 Mbps Operation
Dual Phase Lock Loop
Components of Dual Phase Lock Loop
Dpll Implementation on Active Ports
Jitter Attenuator Daughter Card Jadc
Components of Dpll Implemented on Jadc
Passive Port Technology
Active Port Technology
Per-Port Switching on the Active Modules
Token-Ring Per-Port Switching
Static Switch on the Per-Port Switching Modules
Static Switch Display for Active Per-Port Switching Ports
Show Port slot.port Verbose
SET Port slot.port Staticswitch enabledisable
Switching Ports with Enabled Static Switch
Signal Flow on the 8260 Token-Ring Modules
Port Switching with Source Routing Bridges
Speed Detection on Passive Modules
Speed Detection
Speed Detection on Active Modules
SET Port slot.port Speeddetect enable/disable
SET Module slot.subslot Speedthreshold 0 to
Beacon Recovery Introduction
Beacon Recovery
SET Port slot.port Stationtype macnotpresent
SET Trunk slot RINGIN.trunk port Networkmap externalinternal
Token-Ring Support
SET Device Beaconrecovery enabledisable
SET Device Beacontimeout number of second
Recovery Asic
Recovery Asic in Module Switching Module
Recovery Asic in Per-Port Switching Module
SH Module slot.subslot Verbose
Ring Monitor on the Per-Port Switching Module
Display Output for 18-Port Active Per-Port Switching Module
Beacon Recovery on the Module Switching Modules
Beacon Recovery on the Per-port Switching Modules
Beacon Recovery on the Module Switching Modules
Address-to-Port Mapping for Module Switching Modules
Address-to-Port Map Display for a Module Switching Module
Support for Fan-Out Devices
162 8260 Multiprotocol Intelligent Switching Hub
SET Network Tokenring tokenringn Mismatchresolution enable
Support for MAC-less Stations
Address-to-Port Mapping for Per-Port Switching Modules
Address-to-Port Map Display for MAC-less Stations
Token-Ring Support
Address-to-Port Map Display for a Per-Port Switching Module
Dual-Ring Topology
Trunk Wrapping on the Active Per-Port Switching Modules
Wrapback in Dual-Ring Topology
Trunk Wrapping on the Active Module-Switching Modules
Trunk Wrapping in Active Per-Port Switching Module
Merge Manager
Trunk Unwrapping on the Per-Port Switching Modules
Trunk Unwrapping on the Module-Switching Modules
Token-Ring Support
172 8260 Multiprotocol Intelligent Switching Hub
Configuring Token-Ring Network Parameters
SET Network network Bcnrecovery enabledisable
Token-Ring Modules
SET Network network Ringspeed 4mbps16Mbps
8260 18-Port Active Per-Port Switching Module
SET Network network Mismatchresolution enable
Front View of 18-Port Active Per-Port Switching Module
Port Active Per-Port Switching Module Side View
Configuring the 18-Port Active Per-Port Switching Module
SET Module slot.port Bcnthreshold
SET Port slot.port Staticswitch enabledisabled
Active Per-Port Switching Module
SET Port slot.port Network network
8260 18-Port Active Module Switching Module
Configuring the 18-Port Active Module Switching Module
8260 20-Port Passive Module Switching Module
SET Module slot.subslot Network network
Token-Ring Modules
Front View of 20-Port Passive Module
Configuring the 20-Port Passive Module
Port Passive Module Module Side View
SET Port slot.port Speeddetect enabledisable
SET Module slot.port Speedthreshold
8260 Dual Fiber Repeater Module
Front View of Dual Fiber Repeater Module
RI/RO
Enable/disable trunks
Configuring the Dual Fiber Repeater Module
SET Port slot.port Staticswitch enable
SET Port slot.port mode enabledisable
190 8260 Multiprotocol Intelligent Switching Hub
Rmon Support
Rmon Overview
Network Probes
Rmon Manager
An Example of Rmon Implementation
Problem Detection and Reporting
Rmon Goals
Offline Operation
Preemptive Monitoring
Multiple Managers
Standards
Managing the Ethernet LAN Environment
Managing Ethernet LANs with Rmon
Statistics Group
Drop Events
CRC Align Error
Octets
Packets
Broadcast Packets
History Group
Fragments
Collisions
Packet Size Statistics
Alarm Group
Matrix Group
Host Group
Host Top N Group
Managing the Token-Ring LAN Environment
Managing Token-Ring LANs with Rmon
Filter Group
Packet Capture Group
202 8260 Multiprotocol Intelligent Switching Hub
Drop Event
MAC Octet
MAC Packet
Ring Purge Event
Line Error
Internal Error
Burst Error
Beacon Time
ACErrors
Abort Error
Lost Frame Error
Congestion Error
Frequency Error
Token Error
Soft Error Report
Ring Poll Event
Normal in all networks. For example, when an
Terminal is powered up, it generates some
Total number of octets of data in good frames
Received on the network in non-MAC packets
208 8260 Multiprotocol Intelligent Switching Hub
Ring Station Group
RingStationControlTable RingStationTable
Ring Station Order Group
Ring Station Configuration Group
Source Routing Group
Monitoring Functions Supported
Monitoring Functions Supported by E-MAC
8260A show interface
Host History Alarm Event Matrix Statistics TopN-hosts
Monitoring Functions Supported by T-MAC
Show Counter Interface ethernetn isolated
Show Counter Command for Ethernet Networks
Show Counter Ethernet ethernetn isolated
Show Counter Interface for Ethernet Segment
Show Counter Rmon Hosts network all macaddress
Show Counter Repeater for Ethernet Segment
Collecting and Displaying Rmon Groups Using E-MAC
SET Rmon Host Interface index
Set module slot.subslot interface enable
Set module slot.subslot rmonprobe enable
SET Rmon Host Interface interface index
SET Rmon History Interface interface index
Set rmon host ethernet interface
Show Rmon rmongroup Control ALL
Show Rmon statistics Ethernet Control ALL
Show Rmon rmon group Data controlindex dataindex
Show Counter Command for Token-Ring Networks
Show Counter Tokenring tokenringn
SET Module slot.subalot DOT5GROUP enable
Show Counter Interface token-ringn isolated
8260A show counter interface tokenring7
SET Module slot.subslot Rmonhoststats enable
Show Counter Rmon Ringstation network all macaddress ring
8260A show counter rmon ringstation tokenring7 ring
SET Module slot.subslot Rmonringstationstats enable
Show Counter Rmon Ringstation Using ″all″ Option
Show Counter Rmon Trpromiscuous network
SET Module slot.subslot Rmonmaclayerstats enable
Show Counter Rmon Trmaclayer network
SET Module slot.subslot Promiscuousstats enable
Show Counter Rmon Trsourcerouring network
Collecting and Displaying Rmon Groups Using T-MAC
SET Module slot.subslot Srroutingstats enable
SET Module slot.subslot Rmongroup enable
SET Module slot.subslot Rmonpromiscuousstats enable
SET Module slot.subslot Rmonsrcroutingstats enable
Set module 8.2 rmonhoststats enable
Surrogate Functions Supported by T-MAC
Show Counter Rmon rmon group network
Using T-MAC Surrogate Functions
Enabling Surrogate Features
Enabling Individual Options within the Surrogate Groups
Show Trsurrogate slot.subslot Remstatus
Show Trsurrogate slot.subslot Crsstatus
Show Trsurrogate slot.subslot Crsstation ALL
∙ Status of CRS options
∙ Status of CRS Stations options
Displaying the Information Collected by Surrogate Features
Show Trsurrogate slot.subslot Remerrormacframe
Show Trsurrogate slot.subslot Remlastsofterror
Show Trsurrogate slot.subslot Remisolating
Summary of T-MAC Monitoring Functions
Using DOT5Group Functions
10.8 DOT5Group Support by T-MAC
2 of 2. Functions Performed by T-MAC
Multiprotocol Interconnect Module
239
240 8260 Multiprotocol Intelligent Switching Hub
Front View of the Multiprotocol Interconnect Modules
Power Requirements for Multiprotocol Interconnect Module
12V
SET Power Module slot.subslot Powerrequirement
Put DMM in Maintenance mode using the following DMM command
While in Maintenance mode, enter the following command
You will be prompted to enter the following
Bridging Functions
Do you want to enter this into module x.y′ s Eeprom Y/N
∙ DECnet Phase
Routing Functions
IP Routing Support
RIP Implementation
IPX Routing Support
DECnet Phase IV Routing Support
Configuring Multiprotocol Interconnect Module
Local Management System LMS
SET Port slot.port Network ethernetnisolated
∙ Configuration Menu
∙ Enable/Disable Write Access
∙ Status Menu
∙ Help
LMS Short Cut Commands
Dot1dBridge Group
Snmp Support
∙ Close Connection
Configuring the Interconnect Module Using LMS
Configuring System Wide Parameters
∙ Reset Unit
∙ Change Password
∙ Exit
IP Address Community Name
Tftp Server IP Address Tftp Filename
Configuring Port Parameters
∙ Physical Port List
Physical Port Protocol Parameters
Physical Port Interface Parameters
∙ Logical Port Parameters
Configuring Physical Port Parameters
LMS Physical Port List for Ethernet Connections
Configuring Physical Port Protocol Parameters
LMS Physical Ports List for Token-Ring I/O Cards
∙ Commands
This panel allows you to specify the following options
∙ Ring Speed
∙ Act Mon Par
Configuring Logical Port Parameters
Port Configuration Summary
Configuring for Bridging Support
∙ Encapsulation
∙ Attach Port and Detach Port
Configuring for Transparent Bridging
Bridging Facility must be enabled
− Time-To-Forget in seconds
∙ Security Mode
− Time-To-Delete in seconds
∙ Custom Filtering
∙ Source Address Learning
∙ Source Address Filtering
∙ Always Accept Multicast
∙ Bridge Forward Delay Time
∙ STP Facility
∙ Bridge Hello Time
∙ STP Domain Address
∙ Bridge Max Age Time
∙ STP Version
Configuring for Source-Route Transparent Bridging
Path Cost Mode
Manual Port Path Cost
∙ Port Priority
∙ Hop Count
∙ Local Segment
∙ Largest Frame
∙ Port STE SpanMode
Configuring for Translational Bridging
∙ Snap Conversion
∙ IPX Conversion
Filtering for Bridging Functions
Transparent Bridging Filtering Database
Entries in the filtering database consist
∙ MAC Address ∙ Scope
∙ Disposition
− Unlearned +
− Management%
− Permanent$
− Static
Normal Mode
Security Mode
Operating Modes for Bridging Ports
∙ Time-to-Forget
Destination Address Filtering
Source Address Filtering
Broadcast/Multicast Filtering
Custom Filtering
ID Number
Test Name
∙ Filter Start Point
∙ Offset
∙ Logical Operator
∙ Value
∙ ID Number
∙ Test Name
∙ Action on Success
∙ Action on Failure
Configuring for Routing Functions
Configuring for IP Routing
LMS IP Panel
LMS IP Port Address Table Panel
∙ ARP timeout
∙ Reassembly timeout
∙ IP Routing
∙ Router ID
Default TTL
∙ Proxy ARP
∙ Source Quench
∙ Redirect
IP Mtu
RIP Path Cost
LAN Encapsulation
∙ Broadcast Form
∙ Destination
∙ Security Access List n
∙ Forward Broadcast
∙ Next Hop
Mask
Type
∙ Port
∙ Type
∙ Network Address
∙ Physical Address
∙ Boothelper
∙ Forward Address
Configuring for Ospf
LMS Ospf Menu Panel
∙ Area Border Router
∙ TOS Support
∙ AS Boundary Router
∙ Import RIP Routes
∙ Import Static Routes
∙ Default Action on No Match for RIP Routes
∙ Default Action on No Match for Static Routes
− PointToPoint Point-to-Point links ∙ AdminStat
∙ Trans Delay
∙ IP Address
∙ Area ID
TransDelay
Backup Designated Router
∙ RtdDeadInt
∙ AuthKey
Area ID
Auth Type
∙ Import AS Extern LSA
∙ SPF Runs
This is the 32-bit integer identifying the Stub Area
Metric
∙ Range Mask
From the Ospf Menu. The resulting panel is shown in on
∙ Range Net
This parameter specifies the port number of this interface
IP Address
Port
Following parameters can be specified for each entry
Neighbor
∙ RetransiInt
∙ RtrDeadInt
This parameter specifies the IP address of this neighbor
Port Router ID
∙ Options
∙ Events
IP Mask
Action
This parameter specifies hop count measured in RIP
This parameter specifies the destination IP address mask
Hop Count
Following parameters can be viewed/modified for each entry
This parameter specifies the Type Of Service for this route
This parameter specifies the destination IP address
This parameter specifies the destination IP address mask
This parameter specifies hop count for this static route
IP Security
Following parameters can be viewed/modified for each entry
∙ Operator
∙ ID
Protocol
∙ Source Address
∙ Source Mask
∙ Destination Address
∙ Option
∙ List No
∙ Transmit Check
∙ Action on No Match
∙ Receive Check
Configuring for IPX Routing
∙ Icmp Generation
∙ Internet Bcast Handling
∙ IPX Routing
∙ IPX Security
∙ Network Number
∙ IPX Port Routing
∙ Host Number
∙ Interface Delay
Monitoring Multiprotocol Interconnect Module
∙ Security List n
∙ Station Statistics
∙ Icmp Timers
∙ Physical Port Protocol Statistics
∙ Physical Interface Statistics
∙ Logical Port Statistics Screen
∙ Ospf Link State Database Table
∙ DECnet IV System Statistics
∙ DECnet IV Port Statistics
∙ IPX System Statistics
314 8260 Multiprotocol Intelligent Switching Hub
Appendix A. Power Requirements for 8250/8260 Modules
Power Requirements for 8250 Ethernet Modules
Power Requirements for 8250 Token-Ring Modules
Power Requirements for 8250 Fddi Modules
Power Requirements for 8250 Internetworking Modules
SR/SRT
318 8260 Multiprotocol Intelligent Switching Hub
Index Numerics
UTP
MAC
DMM
Ethernet
Eeprom
324 8260 Multiprotocol Intelligent Switching Hub
Rmon
Token-ring bucket 208 Burst Error
Index
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