Cabletron Systems Switch 9T122 24 User Manual

MMAC-Plus9T122-24  
Three Port Token Ring  
MicroLANSwitch Module  
User’s Guide  
 
Notice  
FCC Notice  
This device complies with Part 15 of the FCC rules. Operation is subject to the following two  
conditions: (1) this device may not cause harmful interference, and (2) this device must accept any  
interference received, including interference that may cause undesired operation.  
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital  
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable  
protection against harmful interference when the equipment is operated in a commercial environment.  
This equipment uses, generates, and can radiate radio frequency energy and if not installed in  
accordance with the operator’s manual, may cause harmful interference to radio communications.  
Operation of this equipment in a residential area is likely to cause interference in which case the user  
will be required to correct the interference at his own expense.  
WARNING: 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.  
VCCI Notice  
This equipment is in the 1st Class Category (information equipment to be used in commercial and/or  
industrial areas) and conforms to the standards set by the Voluntary Control Council for Interference  
by Information Technology Equipment (VCCI) aimed at preventing radio interference in commercial  
and/or industrial areas.  
Consequently, when used in a residential area or in an adjacent area thereto, radio interference may be  
caused to radios and TV receivers, etc.  
Read the instructions for correct handling.  
ii  
 
Notice  
DOC Notice  
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital  
apparatus set out in the Radio Interference Regulations of the Canadian Department of  
Communications.  
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables  
aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique  
édicté par le ministère des Communications du Canada.  
iii  
 
Contents  
Chapter 1  
Chapter 2  
Introduction  
Features........................................................................................................................... 1-1  
Related Manuals............................................................................................................ 1-4  
Getting Help .................................................................................................................. 1-4  
Installation  
Installing the MicroLAN Module............................................................................... 2-1  
The Reset Switch ........................................................................................................... 2-3  
User Accessible Components ...................................................................................... 2-4  
Setting the Module Card DIP Switch ......................................................................... 2-5  
Ring Speed ..................................................................................................................... 2-7  
Multi-Ring Out Capability........................................................................................... 2-7  
Chapter 3  
Operation  
Bridging.......................................................................................................................... 3-1  
Transparent Bridging............................................................................................. 3-2  
Source Route Bridging .......................................................................................... 3-2  
Spanning Tree Algorithm...................................................................................... 3-3  
Flexible Network Bus (FNB)........................................................................................ 3-4  
System Management Buses ......................................................................................... 3-4  
SMB-1 Bus............................................................................................................... 3-4  
SMB-10 Bus............................................................................................................. 3-4  
System Diagnostic Controller...................................................................................... 3-5  
DC/DC Converter ........................................................................................................ 3-5  
FNB Interface................................................................................................................. 3-5  
i960 Core......................................................................................................................... 3-5  
Chapter 4  
Chapter 5  
LANVIEW LEDs  
Specifications  
Safety............................................................................................................................... 5-1  
Service............................................................................................................................. 5-1  
Physical........................................................................................................................... 5-2  
Dimensions ............................................................................................................. 5-2  
Weight...................................................................................................................... 5-2  
Electrical ......................................................................................................................... 5-2  
v
 
Chapter 1  
Introduction  
Token Ring bridge and router module. This module supports either one token  
ring with twenty four HUB connections, or two separate Token Rings with twelve  
HUB connections, and an interface to the FNB backplane.  
Features  
Processor  
The 9T122-24 is equipped with an advanced Intel i960 microprocessor. This  
microprocessor provides a platform for all management functions within a  
scalable RISC-based architecture.  
System Management  
Interfaces to the two System Management Buses (SMB-1 and SMB-10) for  
intermodule management.  
Connectivity  
The 9T122-24 provides twenty four RJ-45 Trunk Coupling Unit (TCU) lobe  
connectors. The connectors may be configured as one twenty four port ring  
(default) or two twelve ports rings.  
Bridging/Routing  
Bridging/Routing between the front panel Token Ring connections and/or to any  
other module in the chassis via FNB -1 or FNB -2 of the FNB bus. The module is  
capable of Transparent Bridging or Source Route Bridging. IEEE 802.1d Spanning  
Tree Protocol is supported in all bridging functions. Translational bridging  
between Source Routing and Transparent Frames types is also performed.  
1-1  
 
Introduction  
Management Information Base (MIB) Support  
The 9T122-24 module provides MIB support including:  
IETF MIB II (RFC 1213)  
IETF RMON MIB (RFC 1271 and 1513)  
IETF Bridge MIBs (RFC 1493 and 1525)  
IEEE 802.5 Token Ring MIB (RFC 1231)  
Cabletron Enterprise MIBs  
For a complete list of supported MIBs, refer to the release notes provided in  
the module package.  
NOTE  
Ring Security  
This feature prevents unauthorized stations from attaching to the ring. Using  
Local or Remote Management, the module may be configured as to which MAC  
addresses are allowed to operate on the ring.  
Multi-Ring Out Capability  
With this feature any port of the module may be configured as a ring-out port  
through management software. In this configuration a stand-alone passive  
concentrator (such as an IBM 8228 MAU) may be added to the ring.  
Telnet  
A telnet session can be set up with the module to provide access to the Local  
Management screens.  
LANVIEW LEDs  
The 9T122-24 use LANVIEW – the Cabletron Systems built-in visual diagnostic  
and status monitoring system. With LANVIEW LEDs, you can quickly identify  
the device, port, and physical layer status at a glance.  
Hot Swapping  
The 9T122-24 can be installed or removed from the chassis while the MMAC-Plus  
is powered up without affecting the operation of the remaining modules in the  
chassis.  
1-2  
 
Features  
TOKEN RING  
9T122-24  
SMB  
FNB  
CPU  
2
1
16 Mb  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
MMAC PLUS  
Figure 1-1. The 9T122-24 MicroLAN Module  
1-3  
 
 
Introduction  
Related Manuals  
The manuals listed below should be used to supplement the procedures and  
technical data contained in this manual.  
MMAC-Plus Installation Guide  
MMAC-Plus Operations Guide  
MMAC-Plus 9C300-1 Environmental Module User’s Guide  
MMAC-Plus 9C214-1 AC Power Supply User’s Guide  
MMAC-Plus Local Management User’s Guide  
Getting Help  
If you need additional support with the MMAC-Plus, or if you have any  
questions, comments or suggestions concerning this manual, feel free to contact  
Cabletron Systems Technical Support:  
By phone:  
(603) 332-9400  
By CompuServe:  
By Internet mail:  
By mail:  
GO CTRON from any ! prompt  
Cabletron Systems, Inc.  
P.O. Box 5005  
Rochester, NH 03867-0505  
1-4  
 
Chapter 2  
Installation  
Installing the MicroLAN Module  
The MMAC-Plus MicroLAN Module may be installed into any of the 14 slots that  
are available. To install, follow the steps below:  
1. Switch off the power supplies and remove all power from the MMAC-Plus  
chassis.  
2. Remove the blank panels, covering the slots that the module is being  
mounted in. All other slots must be covered, if modules are not being  
installed, to ensure proper airflow and cooling.  
3. Carefully remove the module from the shipping box. (Save the box and  
packing materials in the event the module must be reshipped.)  
4. Attach one end of the ESD wrist strap packaged with the MMAC-Plus chassis  
to your wrist. Plug the other end into the ESD Wrist Strap Grounding  
receptacle in the lower right corner of the MMAC-Plus Chassis shown in  
5. Remove the module from the plastic bag. Observe all precautions to prevent  
damage from Electrostatic Discharge (ESD).  
6. Carefully examine the module, checking for damage. If any damage exists,  
DO NOT install the module. Contact Cabletron Systems Technical Support  
immediately.  
7. The modules are installed into the chassis by sliding them into slots and  
Take care that the module slides in straight and engages the backplane  
connectors properly. When installing the module, ensure that both circuit  
upper and lower tracks of both cards.  
2-1  
 
Installation  
L
L
L
I
I
Jack for ESD  
wrist strap  
Metal Back-Panel  
Circuit Card  
Card Guides  
Warning:  
Ensure that the circuit card is between the card guides.  
Lock down the top and bottom plastic tabs  
at the same time, applying even pressure.  
Figure 2-1. Installing the MicroLAN Module  
2-2  
 
 
The Reset Switch  
The Reset Switch  
The Reset switch is located on the front panel, under the top plastic tab as shown  
Pressing the reset switch twice within three seconds causes the processor (i960)  
to reset.  
Pressing and holding the switch on for three or more seconds causes the  
module to shutdown. Pressing and holding again for three seconds restarts the  
module.  
SNMP management may be used to disable this switch to enhance module  
security.  
Reset Switch  
SMB  
CPU  
Figure 2-2. The Reset Switch  
2-3  
 
 
Installation  
User Accessible Components  
Figure 2-3 shows the various components that are accessible to the user. These  
consist of an eight position dip switch (explained in the next section), replaceable  
PROMs and sockets for RAM. These will be used for future upgrades.  
SMB-1 PROM  
i960 Processor  
Flash SIMM  
Socket  
DIP Switch  
Boot PROM  
Shared Packet  
Memory SIMM  
Local Program Memory  
SIMM Socket  
Figure 2-3. User Accessible Components  
2-4  
 
 
Setting the Module Card DIP Switch  
Setting the Module Card DIP Switch  
An eight switch DIP switch is located on the module card as shown in position 8  
1
2
3
4
5
6
7
8
Figure 2-4. Location of Module DIP Switch  
2-5  
 
 
Installation  
See the Cautions at the end of this table.  
Table 2-1. Function of DIP Switch  
Switch  
Function  
Description  
When toggled, this switch clears user-entered  
passwords stored in NVRAM, and restores the  
default passwords. Once reset you can use the  
defaults or enter new passwords.  
Clear  
Password  
8
1
The module uses NVRAM to store user  
entered parameters such as IP addresses,  
device name, etc. To reset these parameters to  
the factory defaults, toggle this switch. Once  
reset you can use the defaults or enter new  
parameters which are stored in NVRAM when  
the module is powered down, and remain  
there until the switch is toggled again.  
Clear  
NVRAM  
7
2
Toggling this switch after pulling the board  
out of the MMAC-Plus, clears download  
information from NVRAM and forces image  
files to be downloaded from the station  
configured to act as that modules’ BOOTP  
server.  
Force BootP  
Download  
6
5
4
3
2
Reserved  
Reserved  
Reserved  
Reserved  
Ring  
For Factory Use Only  
For Factory Use Only  
For Factory Use Only  
For Factory Use Only  
Off= One ring of 24 ports (factory default)  
1
Configuration On = two rings of 12 ports each  
1. Caution: Do not toggle Switch 8 unless you intend to reset the user  
configured passwords to their factory default settings.  
!
2. Caution: Do not toggle Switch 7 unless you intend to reset the user  
CAUTION  
parameters to the factory default settings.  
2-6  
 
 
Ring Speed  
Ring Speed  
The module defaults to a 16Mbps ring speed on all rings. This may be changed  
though local management.  
Multi-Ring Out Capability  
Any port of the module may be configured as a ring-out port through  
management software. In this configuration a stand-alone passive concentrator  
allows for a star-wired network with the MMAC-Plus at the center. Consult the  
MMAC-Plus Local Management Guide for information on configuring the ports.  
TOKEN RING  
9T122-24  
9T122-24  
SMB  
FNB  
CPU  
2
1
1
2
3
4
5
6
7
8
9
G
R
O
U
P
1
IBM 8228™  
STP Cable  
Figure 2-5. Using a Ring-Out Port  
2-7  
 
 
Chapter 3  
Operation  
The 9T122-24 MicroLAN Module provides connectivity between the front panel  
Token Ring(s) and the FDDI rings on the backplane (FNB-1 or FNB-2).  
MMAC-Plus modules connect to either the Internal Network Bus (INB) or the  
Flexible Network Bus (FNB) bus. The 9T122-24 module connects to the FNB bus.  
configured as one Token Ring (factory default) or as two rings. In the two ring  
configuration, the rings function as individual networks, each with twelve ports.  
Bridging/Routing may occur between these two rings and/or to any other  
MMAC-Plus module via the Flexible Network Bus.  
DC/DC  
Converter  
SMB-1  
System  
Diagnostic  
Controller  
SMB-10  
Twelve  
Front Panel  
Connections  
FNB-1 or  
FNB-2  
i960 PLUS Core  
Twelve  
Front Panel  
Connections  
Figure 3-1. 9T122-24 Block Diagram  
Bridging  
The 9T122-24 is configured for SRT bridging. It will pass SR (Source Routing)  
frames between the rings and provides translation to transparent frames over the  
FNB to Ethernet and FDDI modules. For information on configuring the bridging  
function, see the addendum to the MMAC-Plus Local Management User’s Guide,  
containing information specific to this model.  
3-1  
 
 
Operation  
Transparent Bridging  
Transparent Bridging is accomplished by building a Source Address Table (SAT)  
from source MAC/physical addresses and using the SAT to make forwarding  
decisions.  
The 9T122-24 prevents unnecessary network traffic from passing through the  
module by implementing two separate filtering processes — IEEE 802.1d or  
Cabletron’s Special Filtering Database. These processes may be used individually  
or in tandem.  
The first process, the IEEE 802.1D filtering process, begins with the creation of a  
list of local node addresses in a table (the SAT). When the 9T122-24 first goes on-  
line, it initially forwards all packets across the bridge. After receiving a packet on  
the bridge port, the 9T122-24 learns the address of the sending node from the  
packet and stores that address in the SAT. In this manner, the bridge learns the  
address of each node on each side of the bridge. The bridge then uses the  
addresses stored in the table to compare the destination address of each  
subsequent packet that travels to the bridge. If the destination address of a packet  
resides on the bridge segment, the 9T122-24 does not forward across the Token  
Ring link.  
The second filtering process, the Cabletron Systems Special Filtering Database,  
provides an additional step in the filter/forward decision. Through Remote  
Management, you can define up to 10 additional filtering parameters for  
incoming network traffic. These parameters include (but are not limited to) the:  
destination address  
source address  
type field (protocol)  
64 bytes of the data field (using a data offset)  
For example, using this process, you can ensure that the 9T122-24 always filters or  
forwards packets with a specific protocol or address.  
Source Route Bridging  
Source Route Bridging operates by transmitting frames over a designated route.  
Unlike Transparent Bridging, all devices in a Source Route Bridged (SRB) network  
“know” the locations of other stations within the network. Using a portion of the  
MAC frame header known as the RIF (Routing Information Field), the source  
device determines the route for the frames it sends.  
In order for source routing to work, the source station must determine the proper  
route to reach the desired destination. To accomplish this:  
1. The source station sends out frames called All Route Explorer (ARE) or Single  
Route Explorer (SRE) frames onto the network. All Source Route Bridges  
recognize these frames and forwards them to their outbound ports.  
3-2  
 
Bridging  
2. The receiving bridges append their own route information to the Route  
Information Field (RIF) in the MAC frame header and transmit the frame  
again.  
3. Eventually, the original source device receives all of the ARE replies from the  
other end stations on the network.  
4. From this information, the source device can determine a desired route for  
each frame it transmits.  
Spanning Tree Algorithm  
The 9T122-24 promotes maximum network use in multiple bridge environments.  
A bridge learns the bridge topology of its network from bridge protocol data that  
it receives from other bridges within the network. The bridges then apply the  
Spanning Tree Algorithm (STA) to select a root bridge, and then determine  
primary data paths within potential data loop configurations.  
Spanning Tree Algorithm is a hierarchy (or tree) of priorities that bridges establish  
between themselves. This hierarchy guarantees that primary and redundant data  
paths are clearly defined at all times, so that the network is continuously available  
to users.  
In a multiple bridge environment, one bridge in the network establishes itself as  
the root bridge. As the root, this bridge has priority over all other bridges. In a  
Spanning Tree, all of the bridges must determine which bridge is the root, and  
then determine their own relative priority within the network.  
3-3  
 
Operation  
Flexible Network Bus (FNB)  
The FNB consists of two dual FDDI networks, the FNB-1 and FNB-2, providing  
up to 400 Mbps of data bandwidth. These FDDI networks are 100% ANSI  
FDDI-compliant supporting SMT (version 7.3), MAC, PHY, and PMD standards.  
This allows the FNB to traverse multiple MMAC-Plus hubs, or connect to any  
ANSI FDDI-compliant device, through standard A/B port connections, using the  
FDDI repeater module.  
System Management Buses  
There are two management channels within the MMAC-Plus system: the SMB-1  
and the SMB-10. These buses provide out-of-band management and inter-module  
management communication.  
SMB-1 Bus  
The SMB-1 is a 1Mbs management bus located within the MMAC-Plus. This bus  
is utilized by all diagnostic controllers in the system including connectivity  
modules, power supply modules and the environmental module. The SMB-1  
transports inter-chassis information between system components, such as power  
and environmental information, as well as diagnostic messages. Periodic  
loop-back test are preformed by all modules which share this bus to ensure the  
validity of SMB-1. In the event a failure is detected on SMB-1, the SMB-10 may be  
used as an alternate communication channel.  
SMB-10 Bus  
The SMB-10 is a 10Mbs management bus located within the MMAC-Plus which is  
also used for inter-chassis communication of modules as well as serving as an  
out-of-band management channel into the MMAC-Plus. The SMB-10 is  
externalized from the chassis via an optional Ethernet Port Interface Module  
(EPIM) located on the front of the Environmental Module. Through an EPIM  
connection, full SNMP management of the MMAC-Plus is available out-of-band  
from user data. Modules which share the SMB-10 bus periodically send out loop-  
back packets to ensure the validity of SMB-10. In the event a fault is detected on  
the SMB-10, the SMB-1 can be used as an alternate communication channel by the  
modules.  
3-4  
 
System Diagnostic Controller  
System Diagnostic Controller  
This diagnostic controller is composed of a Z-80 microprocessor and it’s  
supporting logic. The diagnostic controller is designed to control the power-up  
sequencing of modules, monitor the 9T122-24 input and output power  
parameters, keep watch over the main host processor, as well as monitor the  
temperature and control the SMB LANVIEW diagnostic LED. Although the  
diagnostic controller and the main host processor can operate independent of  
each other if needed, they exchange information about each others status and  
overall module condition. The information gathered by the diagnostic controller  
is available to the network manager via local/remote management and the LCD  
located on the environment module. The 9T122-24 have been designed so that in  
the event of a diagnostic controller fault, the modules will continue to function.  
DC/DC Converter  
The DC/DC converter converts the 48 VDC on the system power bus to the  
necessary operating voltages for its host network services module. The diagnostic  
controller controls the operation of the DC/DC converter.  
FNB Interface  
MMAC-Plus modules are designed with one of two attachment policies. One  
allows a module to dual attach to either FNB-1 or FNB-2; the second allows dual  
attachment to both FNB-1 and FNB-2. The 9T122-24 have one dual attachment to  
the FNB backplane, connecting to either FNB-1 or FNB-2. The module can insert  
into the FNB or bypass it. These flexible configuration options make the  
MMAC-Plus ideal for networks designed to Bridge/Route multiple lower speed  
LANs to FDDI and/or networks designed using an FDDI collapsed backbone.  
i960 Core  
The i960 core in the FNB module serves two major functions: it provides the  
packet forwarding logic and performs all network management services. FNB  
modules can be configured to run as layer 2 bridges, layer 3 routers or as  
SecureFast Packet Switches. It is possible to run the bridging and routing options  
concurrently, but the SFPS option cannot run with bridging and routing.  
The i960 core provides the SNMP protocol stacks, as well as support for industry  
standard MIBs. Additionally, Cabletron enterprise extension MIBs are supported  
for each media type. Advanced management services, such as the Distributed  
LAN Monitor, RMON, telnet and network address to MAC address mapping,  
are also provided by the i960 core.  
3-5  
 
Chapter 4  
LANVIEW LEDs  
module and may be used as an aid in troubleshooting.  
TOKEN RING  
System Status  
9T122-24  
FNB Receive  
FNB Transmit  
SMB  
FNB  
CPU  
Token Ring Mac Transmit  
2
1
Token Ring Speed  
(16mb)  
16 Mb  
Token Ring Mac Receive  
1
2
3
4
5
Link  
Figure 4-1. LANVIEW LEDs  
4-1  
 
 
LANVIEW LEDs  
The functions of the two System Status LEDs, System Management Bus (SMB)  
Table 4-1. System Status LEDs (SMB and CPU)  
LED Color  
Green  
State  
Description  
Fully operational.  
Functional  
Crippled  
Booting  
Reset  
Yellow  
Not fully operational (i.e., one bad port).  
Blinks yellow and green while booting.  
Normal power-up reset.  
Yellow/Green  
Red  
Red (Flashing)  
Off  
Failed  
Fatal error has occurred.  
Power off  
Module powered off.  
The function of the FNB receive LED is listed in Table 4-2.  
Table 4-2. FNB Receive LEDs  
LED Color  
State  
No link, Port disabled  
Red  
Red (Flashing)  
Green  
Link, Port disabled  
Link, No activity, Port enabled  
Activity (Flashing rate indicates rate of activity).  
No activity  
Yellow (Flashing)  
Off  
Table 4-3. FNB Transmit LEDs  
LED Color  
State  
Port disabled  
Red  
Red (Flashing)  
Yellow (Flashing)  
Green (Flashing)  
Off  
Fault or Error (Flashing rate indicates rate)  
Port in standby state  
Activity (Flashing rate indicates rate of activity).  
No activity  
4-2  
 
     
The function of the Token Ring Mac receive LEDs are listed in Table 4-4.  
Table 4-4. Token Ring Receive LED  
LED Color  
Red  
State  
No link, Port disabled  
Link, Port disabled  
Red (Flashing)  
Green  
Link, No activity, Port enabled  
Yellow (Flashing) Link, Activity (Flashing rate indicates rate of activity).  
Off No link, No activity, Port enabled  
The function of the Token Ring Mac transmit LEDs are listed in Table 4-5.  
Table 4-5. Token Ring Transmit LED  
LED Color  
State  
Red  
Port Disabled  
Red (Flashing)  
Green (Flashing)  
Yellow (Flashing)  
Off  
Fault, Ring is Beaconing  
Activity (Flashing rate indicates rate of activity).  
Port in standby state, Link  
No activity, Port enabled  
The functions of the Link LED are listed in Table 4-6.  
Table 4-6. Port Link LEDs  
LED Color  
Red  
State  
No link, Port disabled  
Link, Port disabled or Speed fault  
Link, Port enabled  
Red (Flashing)  
Green  
Off  
No link, Port enabled  
4-3  
 
     
LANVIEW LEDs  
Table 4-7. Token Ring Speed  
LED Color  
Yellow  
Off  
State  
16 Mbs  
4 Mps  
4-4  
 
 
Chapter 5  
Specifications  
Safety  
It is the responsibility of the person who sells the system to which the module will be a  
part to ensure that the total system meets allowed limits of conducted and radiated  
emissions.  
!
CAUTION  
This equipment meets the safety requirements of:  
UL 1950  
CSA C22.2 No. 950  
EN 60950  
IEC 950  
EMI Requirements of FCC Part 15 Class A  
EN 55022 Class A  
VCCI Class I  
EMC requirements of:  
EN 50082-1  
IEC 801-2 ESD  
IEC 801-3 Radiated susceptibility  
IEC 801-4 EFT  
Service  
MTBF (MHBK-217E)  
MTTR  
>200,000 hrs.  
<0.5 hr.  
5-1  
 
Specifications  
Physical  
Dimensions:  
35.0 D x 44.0 H x 3.0 W centimeters  
(13.8 D x 17.4 H x 1.2 W inches)  
Weight:  
Unit:  
1.36 kg. (3lb)  
1.81 kg. (4lb)  
Shipping:  
Electrical  
CPU:  
i960  
Shared DRAM Memory: 4Mb (expandable to 12 Mb)  
Local DRAM Memory:  
Flash:  
4Mb (expandable to 12 Mb)  
2Mb (expandable to 14 Mb)  
(2) Texas Instruments TMS380C26 Controllers  
128 Kb  
Token Ring Interfaces:  
NVRAM:  
5-2  
 

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