Cabletron Systems 9A656-04 Installation and operating instructions

9033126-01 Page 1 of 43
PVC ADDENDUM TO THE
9A686-04/9A656-04 CONFIGURATION GUIDE
This addendum to the 9A686-04/9A656-04 Configuration Guide provides an overview of the
configurations that must take place before the first PVC can be created, and describes how to create a
PVC on the 9A686-04 and 9A656-04. This document provides a configuration example, with instructions
on how to create a PVC to meet the needs of the network.
Overview
This document includes the following topics:
• Overview of ILMI 4.0 and the SmartSwitch 9500 system, and how it pertains to the creation of PVCs.
• Overview of Persistence, and how it pertains to the creation of PVCs.
• Overview of the front panel interface numbering, and CTM backplane interface numbering schemes
supported by the 9A686-04 and 9A656-04.
• Overview of Traffic Descriptors, and how they pertain to the creation of PVCs.
• Overview of creating a PVC across the CTM backplane of the SmartSwitch 9500.
• A step-by-step instructs how to perform the following tasks:
• Configure the ILMI settings of a SmartSwitch 9500
• Verify that persistence is active on the SmartSwitch 9500
• Create a new traffic descriptor
• Create a PVC from a front panel interface on a 9A686-04 to another front panel interface on the same
9A686-04
NOTE
This guide is for Cabletron Systems service personnel and QUALIFIED customer
maintenance personnel who are familiar with installing networking systems, and have
a working knowledge of ATM networks, and the use of MIBs to configure network
devices.
The information contained in this supplement supersedes ANY and ALL information
regarding PVCs described in the
9A686-04/9A656-04 Configuration Guide .
Unless noted otherwise, the information contained in this supplement pertains to both
the 9A686-04 and the 9A656-04.
!
CAUTION
Throughout this document, the user is often instructed to verify the settings configured
in the previous step. It is highly recommended the user perform these verification
steps.This will assist the user in determining where problems may have occurred if the
PVC does not become operational.

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ILMI 4.0 and the SmartSwitch 9500 System
By default, the SmartSwitch 9500 is an SVC-only switch. This means that noVPI/VCI pairs are reserved
for PVCs. Before the user can create a PVC, the default ILMI settings must be changed to reserve
VPI/VCI pairs for PVC use.
Local management of the SmartSwitch 9500 allows the user to specify minimum and maximum values
for VCI and VPIs for all SVCs and SPVCs that the SmartSwitch 9500 will use while establishing
connections. Table 1 provides the default settings ILMI uses when first connected to the ATM network.
Table 2 displays the available range of VCI/VPI pairs that may be configured for requested connections.
Table 1 Default Minimum and Maximum VCI andVPIValues for SVCs and SVPCs
Table 2 Minimum and Maximum VCI andVPI Ranges
The main purpose of the ILMI Configuration Menu screen is to limit the range ofVPI/VCI pairs for SVC
connections. In the default setting, there are no VPI/VCI pairs reserved for PVCs. Refer to Figure 1.
Minimum VCI for SVCs
(MIN SVCC VCI field) 32
Minimum CTM VCI for SVCs
(Min CTM SVCC VCI field) 32
Maximum VPI for SVCs
(MAX SVCC VPI field) 4095
Maximum VPI for VPCs
(MAX SVPC VPI field) 4095
Type MinimumValue Maximum Value
VCI for SVCs 32 16k
VCI for CTM SVCs 32 511
Maximum VPI for SVCs 0 4095
Maximum VPI for VPCs 0 4095

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Figure 1 Default ILMI Settings
Figure 1 displays the default settings of ILMI for the 9A686-04 and 9A656-04. The entire square
represents the totalVPI/VCI range for allATM Connections. This provides a VCI range of 0 through 16K
and aVPI range of 0 through 4095.VCI values 0 through 32 are reserved by theATM Forum, as shown in
Figure 1. By default, the 9A686-04 and 9A656-04 are an SVC only switch. This allows SVCs to be
created with a VCI value between 32 and 16k. In addition, the default setting allows SVCs to use the
entire VPI range of 0 through 4095. The ILMI Configuration screen allows the user to either decrease or
increase the reserved VCI or VPI range that SVCs may use. Refer to Figure 3.
VCI Range
4095
0
VPI Range
016k
VCI
0-31
VPI
0-4095
Reserved by the
ATM Forum
VCI 32-16K
VPI 0-4095 VCI Values 32-16K
VPI Values 0-4095
Available for Use by
SVCs ONLY
Max SVCC VPI=4095
31
Min SVCC VCI=32

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Figure 2 Modified ILMI Configuration Menu Screen
Figure 2 displays how the ILMI Configuration Menu screen may be used to change the
SmartSwitch 9500 from the default settings. The settings entered in Figure 2 result in the configuration
shown in Figure 3.
Figure 3 User-Defined ILMI Configuration
!
CAUTION
Changing the values of the ILMI Configuration screen will cause all current
connections on the system to be dropped.
VCI Range
4095
0
VPI Range
016k
VCI
0-31
VPI
0-4095
Reserved by the
ATM Forum
VCI
32-199
VPI
0-4095 VCI Values 32-199
VPI Values 0-4095
Available for Use by
PVCs Only
VCI 32-16K
VPI 5-4095 VCI Values 32-16K
VPI Values 5-4095
Available for Use by
PVCs Only
31 200
Min SVCC VCI=200
Min CTM SVCC VCI=200
3
4
Max. SVCC VPI
Max. SVPC VPI VCI 200-16k, VPI 4
VCI 200-16k, VPI 0-3
VPI Values 1-4 Available for SVPCs,
VPI 4 is also available for PVCs
With VCI Range 32-16k
VCI Values 200-16k
VPI Values 0-3 Available
for SVCs and SVPCs. This is
the ONLYAvailable Range for SVCs

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Figure 3 provides an example of a user-defined ILMI configuration. In this example the user has
increased the minimum VCI value for SVCCs from the default value of 33 to 200. The maximum VPI
value for SVCCs has been set to 3, and the maximum VPI value for SVPCs has been set to 4. This limits
the range for SVCCs and SVPCs to the settings displayed in Figure 3.
Persistence
The procedures described in this document, by default, create permanent configurations for the interface
on which they were performed, which are defined as “persistent” configurations. These configurable
options are performed on an interface by interface basis via theAToM MIB. Before performing any of
these configurations, be aware that the only way to revert these settings to the factory default settings is to
clear NVRAM. Instructions on how to clear NVRAM can be found in the 9A686-04 Hardware and
Installation Guide and the 9A656-04 Hardware and Installation Guide . Pressing the RESET button on
the front of the module will NOT restore factory default settings after they have been changed.
Keep in mind that if the user turns off persistence (described later in this document),ALL PVCs created
on this ENTIRE chassis will be lost if ANY module in the SmartSwitch 9500 chassis resets.
!
CAUTION
Before making any changes to the ILMI Configuration Menu screen, refer to the
following two examples of what can happen if ILMI settings are changed
indiscriminately:
The user sets the MIN SVCC VCI field to 2000.However, a third party ATM Uplink
device is attached to this SmartSwitch 9500, and this uplink device only supports a
VCI range of 0 through 1064.In this case, the ATM Uplink device would NOT be able
to establish ANY SVCs with the SmartSwitch 9500. The user MUST be aware of the
VPI/VCI ranges of ALL devices that connect to this SmartSwitch 9500 before
changing the ILMI parameters .
The user sets the MIN CTM SVCC VCI field to 500.In this case, the user has allowed
only 11 VCI values to be reserved for SVCs across the CTM backplane of this
SmartSwitch 9500. Be aware that the VCI range for all CTM interfaces is 0 through
511. If the user sets a value at or above 511 for this field, NO SVCs will be
created across the CTM backplane.

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Front Panel Interface (Port) Numbering
Read through the following section to learn about the front panel interface numbering scheme used by the
9A686-04 and 9A656-04. An understanding of this numbering scheme is necessary to create a PVC on a
front panel interface.
The 9A686-04 and 9A656-04 use a geographic interface numbering scheme that allows for easy
identification of each front panel and backplane interface of each 9A686-04 and 9A656-04 installed in
the SmartSwitch 9500 chassis. Interface numbers are generated as follows:
Slot ##, ANIM ##, Interface ##
Table 3 provides an example of how the interface numbering scheme works. In this example, there is a
SmartSwitch 9500 chassis with five 9A686-04 modules installed. These modules are installed in slots 1,
3, 7, 11 and 14. Each of these modules are equipped with fourANIM 21/3s. This provides each 9A686-04
and 9A656-04 with 12 front panel interfaces. Refer to Table 3 for a breakdown of the interface numbering
scheme.
Table 3 Front Panel Interface (Port) Numbering Example
ANIM # Interface # Slot 1 Slot 3 Slot 7 Slot 11 Slot 14
1 1 10101 30101 70101 110101 140101
1 2 10102 30102 70102 110102 140102
1 3 10103 30103 70103 110103 140103
2 1 10201 30201 70201 110201 140201
2 2 10202 30202 70202 110202 140202
2 3 10203 30203 70203 110203 140203
3 1 10301 30301 70301 110301 140301
3 2 10302 30302 70302 110302 140302
3 3 10303 30303 70303 110303 140303
4 1 10401 30401 70401 110401 140401
4 2 10402 30402 70402 110402 140402
4 3 10403 30403 70403 110403 140403

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CTM (Backplane) Interface Numbering Scheme
Read through the following section to learn about the CTM interface numbering scheme used by the
9A686-04 and 9A656-04. An understanding of this numbering scheme is necessary to create a PVC
across the CTM backplane.
Table 4 through Table 7 provide examples of how the CTM interface numbering scheme works,
depending on when the user has a 9A656-04 or 9A686-04, and if these modules are installed in a 14-slot
or 6-slot SmartSwitch 9500 chassis.
Refer to Creating a PVC across the CTM Backplane on page 10 for an example of how a user would use
the CTM backplane interface numbering scheme to create a PVC that traverses the CTM backplane.
Table 4 CTM Interface Numbering for a 9A656-04 Installed in the 14-Slot SmartSwitch 9500
To the 9A656-04 or 9A686-04 installed in slot number X
Slot #
1234567891011121314
From the 9A656-04 installed in slot number
X
1
xxx 902 1001 1002 1101 1102 1201 1202 1301 1302 1401 1402 1501 1502
2
901 xxx 1001 1002 1101 1102 1201 1202 1301 1302 1401 1402 1501 1502
3
901 902 xxx 1002 1101 1102 1201 1202 1301 1302 1401 1402 1501 1502
4
901 902 1001 xxx 1101 1102 1201 1202 1301 1302 1401 1402 1501 1502
5
901 902 1001 1002 xxx 1102 1201 1202 1301 1302 1401 1402 1501 1502
6
901 902 1001 1002 1101 xxx 1201 1202 1301 1302 1401 1402 1501 1502
7
901 902 1001 1002 1101 1102 xxx 1202 1301 1302 1401 1402 1501 1502
8
901 902 1001 1002 1101 1102 1201 xxx 1301 1302 1401 1402 1501 1502
9
901 902 1001 1002 1101 1102 1201 1202 xxx 1302 1401 1402 1501 1502
10
901 902 1001 1002 1101 1102 1201 1202 1301 xxx 1401 1402 1501 1502
11
901 902 1001 1002 1101 1102 1201 1202 1301 1302 xxx 1402 1501 1502
12
901 902 1001 1002 1101 1102 1201 1202 1301 1302 1401 xxx 1501 1502
13
901 902 1001 1002 1101 1102 1201 1202 1301 1302 1401 1402 xxx 1502
14
901 902 1001 1002 1101 1102 1201 1202 1301 1302 1401 1402 1501 xxx

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Table 5 CTM Interface Numbering for a 9A686-04 Installed in the 14-Slot SmartSwitch 9500
To the 9A656-04 or 9A686-04 installed in slot number X
Slot #
1234567891011121314
From the 9A686-04 installed in slot number
X
1
xxx 503 504 601 602 603 604 701 702 703 704 801 802 803
2
502 xxx 504 601 602 603 604 701 702 703 704 801 802 803
3
502 503 xxx 601 602 603 604 701 702 703 704 801 802 803
4
502 503 504 xxx 602 603 604 701 702 703 704 801 802 803
5
502 503 504 601 xxx 603 604 701 702 703 704 801 802 803
6
502 503 504 601 602 xxx 604 701 702 703 704 801 802 803
7
502 503 504 601 602 603 xxx 701 702 703 704 801 802 803
8
502 503 504 601 602 603 604 xxx 702 703 704 801 802 803
9
502 503 504 601 602 603 604 701 xxx 703 704 801 802 803
10
502 503 504 601 602 603 604 701 702 xxx 704 801 802 803
11
502 503 504 601 602 603 604 701 702 703 xxx 801 802 803
12
502 503 504 601 602 603 604 701 702 703 704 xxx 802 803
13
502 503 504 601 602 603 604 701 702 703 704 801 xxx 803
14
502 503 504 601 602 603 604 701 702 703 704 801 802 xxx

PVC Addendum to the 9A686-04/9A656-04 Configuration Guide
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Table 6 CTM Interface Numbering for a 9A656-04 Installed in the 6-Slot SmartSwitch 9500
To the 9A656-04 or 9A686-04 installed in slot number X
Slot #
112233445566
From the 9A656-04 installed in slot number
X
1 xxx xxx 1001 1002 1101 1102 1201 1202 1301 1302 1401 1402
2 901 902 xxxx xxxx 1101 1102 1201 1202 1301 1302 1401 1402
3 901 902 1001 1002 xxxx xxxx 1201 1202 1301 1302 1401 1402
4 901 902 1001 1002 1101 1102 xxxx xxxx 1301 1302 1401 1402
5 901 902 1001 1002 1101 1102 1201 1202 xxxx xxxx 1401 1402
6 901 902 1001 1002 1101 1102 1201 1202 1301 1302 xxxx xxxx
Table 7 CTM Interface Numbering for a 9A686-04 Installed in the 6-Slot SmartSwitch 9500
To the 9A656-04 or 9A686-04 installed in slot number X
Slot #
112233445566
From the 9A686-04 installed in slot number
X
1 xxx xxx 504 601 602 603 604 701 702 703 704 801
2 502 503 xxxx xxxx 602 603 604 701 702 703 704 801
3 502 503 504 601 xxxx xxxx 604 701 702 703 704 801
4 502 503 504 601 602 603 xxxx xxxx 702 703 704 801
5 502 503 504 601 602 603 604 701 xxxx xxxx 704 801
6 502 503 504 601 602 603 604 701 702 703 xxxx xxxx

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Traffic Descriptors for the 9A686-04 and 9A656-04
If the user is creating a PVC for the first time, the user must also create a traffic descriptor. A traffic
descriptor profile instructs the two interfaces, or sides, of the PVC as to what type ofATM connection
they will support. For example, in the PVC created later on in this document, the user desires a Variable
Bit Rate (VBR) connection between the two interfaces. In addition, a Peak Cell Rate (PCR) of 1000 cells
a second, and a Sustained Cell Rate (SCR) of 500 cells a second, with a Maximum Burst Size of 75. All
of this information is configured in the traffic descriptor. Then, when the PVC is created, this traffic
descriptor is assigned to the PVC. This traffic descriptor can then be assigned to any other number of
PVCs that the user requires, or new traffic descriptors that provide different levels of QoS (CBR, ABR,
etc.) may be created. Table 8 provides a detailed listing of the 15 traffic profiles supported by the
9A686-04 and 9A656-04.
Creating a PVC across the CTM Backplane
This section provides a basic example of creating a PVC across the CTM backplane. In this case, two
PVCs must be configured. Refer to Figure 4.
Figure 4 Creating a PVC Across Multiple Modules
In this example, the user created a PVC from port 3 ofANIM 1 of the 9A686-04 installed in slot 1 of the
chassis, to port 1 of ANIM 1 of the 9A686-04 installed in slot 14 of the chassis.
NOTE
The user MUST create at least one traffic descriptor before a PVC can be created.
Port 4
Port 3
Port 2 ANIM 1
Port 1
Port 3
Port 2 ANIM 2
Port 1
Port 3
Port 2 ANIM 3
Port 1
Port 3
Port 2
ANIM 4
Port 1
CTM Backplane
Port 3
Port 2
ANIM 1
Port 1
Port 3
Port 2
ANIM 2
Port 1
Port 3
Port 2
ANIM 3
Port 1
Port 3
Port 2
ANIM 4
Port 1
9A686-04 Installed in Slot 1 9A686-04 Installed in Slot 14
AB
CTM
Interface CTM
Interface
C