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

PVC Addendum to the 9A686-04/9A656-04 Configuration Guide
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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

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Figure 4 contains three callouts, which are described as follows:
A
Displays the first PVC the user must create between port 3 of ANIM 1 to one of the CTM backplane
interfaces. Refer to page 6 for a description of the interface numbering scheme of the 9A686-04 and
9A656-04.
B
Displays how the CTM automatically connects the two PVCs across the backplane, provided both PVCs
have been configured correctly. The user must assign the sameVPI/VCI pair to both PVCs for the PVC to
be automatically connected across the backplane.
C
Displays the second PVC the user must create between port 1 of ANIM 1 to one of its CTM backplane
interfaces. Refer to page 6 for a description of the interface numbering scheme of the 9A686-04 and
9A656-04.
!
CAUTION
Keep in mind that both PVCs created in this example MUST share the same VPI/VCI
pair for the PVC to be automatically connected across the backplane.

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NOTE
If the modules in Figure 4 were 9A656-04s, the user would create PVCs between the
following interfaces:
From interface 10103 (port 3 of ANIM 1 of the 9A656-04 installed in slot 1) to interface
11502 (interface number of the CTM interface of the slot 1 9A656-04 that is connected
to the 9A656-04 installed in slot 14, refer to Table 4).
From 140101 (port 1 of ANIM 1 of the 9A656-04 installed in slot 14) to 140901
(interface number of the CTM interface of the slot 14 9A656-04 that is connected to the
9A656-04 installed in slot 1, refer to Table 4).
The following two examples take place in a 6-slot SmartSwitch 9500.In this case, each
module has two connections to each module connected to the CTM.For PVC creation
across the backplane, the user may choose either of the two interfaces that connect to
the desired module for ONE side of the connection. Once this first CTM interface is
chosen, the second side MUST use the CTM interface that directly connects to the
CTM interface of the first side.For example, if the user wanted to create a PVC
between slot 1 and slot 6 of the chassis, the user could choose between slot 1’s
applicable front panel interface and CTM interfaces 10704 or 10801.These are the two
interfaces that have direct connections with the slot 6 module. If the user selects
interface 10704 for the FIRST side, then the SECOND side of the PVC (the slot 6
module) MUST create a PVC between the its applicable front panel interface and CTM
interface 60502.This is the CTM Interface that has direct connection with CTM
interface 10704. If the user selects CTM interface 60503, the PVC will NOT connect
across the backplane.
If the modules in Figure 4 were 9A656-04s installed in slots 1 and 6 of a 6-slot
SmartSwitch 9500 chassis, the user would create PVCs between the following
interfaces:
From interface 10103 (port 3 of ANIM 1 of the 9A656-04 installed in slot 1) to interface
11401 (interface number of the CTM interface of the slot 1 9A656-04 that is connected
to the 9A656-04 installed in slot 6, refer to Table 6).
From 60101 (port 1 of ANIM 1 of the 9A656-04 installed in slot 6) to 60901 (interface
number of the CTM interface of the slot 6 9A656-04 that is connected to the 9A656-04
installed in slot 1, refer to Table 6).
If the modules in Figure 4 were 9A686-04s installed in slots 1 and 6 of a 6-slot
SmartSwitch 9500 chassis, the user would create PVCs between the following
interfaces:
From interface 10103 (port 3 of ANIM 1 of the 9A686-04 installed in slot 1) to interface
10801 (interface number of the CTM interface of the slot 1 9A686-04 that is connected
to the 9A686-04 installed in slot 6, refer to Table 7).
From 60101 (port 1 of ANIM 1 of the 9A686-04 installed in slot 6) to 60503 (interface
number of the CTM interface of the slot 6 9A686-04 that is connected to the 9A686-04
installed in slot 1, refer to Table 7).

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Step-By-Step Example of Adjusting ILMI Parameters,Verifying Persistence,
Creating aTraffic Descriptor, and Creating a PVC
Proceed through the following steps to configure the required parameters and to create the PVC:
Step 1. Adjust the ILMI Parameters.
If the SmartSwitch 9500 system kept the default settings, it is necessary to reserve VCI/VPI pairs for
PVCs. This is performed via the ILMI Configuration screen, as shown in Figure 5.
Figure 5 ILMI Configuration Menu Screen
NOTE
This section is only required when the 9A686-04 and 9A656-04 have kept their default
ILMI settings.The default ILMI settings make the 9A686-04 and 9A656-04 an
SVC-only switch. If VPI/VCI values have already been reserved, refer to step 2.
Refer to Chapter 2 of the
9A686-04/9A656-04 Configuration Guide for instructions on
establishing a Local Management connection.
For additional information on ILMI, refer to sections 8.2.3.8 through 8.2.3.10 of the
ATM Forum’s ILMI 4.0 specification for suggested use of VCI/VPI configurations for
PVCs.This document may de downloaded from the ATM Forum’s web site at the
following URL:
www.atmforum.com

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In this example, the ILMI Configuration screen is used to set the following parameters:
• MIN SVCC VCI field is set to 400.
• MIN CTM SVCC VCI field is set to 32
• MAX SVCC VPI field is set to 0.
• MAX SVPC VPI field is set to 0.
With this configuration entered and saved, the SmartSwitch 9500 reserves VCI values 33 through 400,
with theVPI value of 0 for PVCs. PVCs may also be created with aVCI range of 33 through 64k on VPIs
greater than 0, up to 4k. SVCs may only be created on VPI 0 with a VCI of 401 through 64k.
Once these values are set, determine which interfaces will share the PVC, and the VPI/VCI values that
will be assigned to this PVC. In this example, the PVC will be between interface numbers 30301 (Port 1
ofANIM 3 of the 9A686-04 installed in slot 3) and 30302 (Port 2 ofANIM 3 of the 9A686-04 installed in
slot 3). TheVPI value will be 11, and the VCI value will be 113.
Step 2. Determine whether the PVC will support Persistence.
The procedures described in this document, by default, create permanent configurations for the interface
on which they were performed. These configurable options are performed on an interface by interface
basis via the AToM 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.
If the user desires to have the PVC NOT support persistence, persistence may be turned off via the SPVC
Destination Creation screen. Refer to Figure 6.
NOTE For additional information on the ILMI Configuration Menu screen of the 9A686-04 and
9A656-04, refer back to page 2.
The VCI values 0 through 32 are reserved by the ATM Forum.

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Figure 6 SPVC Destination Creation Screen
Turning Off Persistence
a. Establish a Local Management connection.
b. Step through the menu screens, until the SPVC Connection Management Menu screen displays.
c. Select the Create Destination menu item.
d. Press ENTER. The SPVC Destination Creation screen displays.
e. Use the arrow keys to highlight the TOGGLE PERSISTENCE field.
f. Press the SPACE bar until the ATOM Persistence field displays “OFF”.
g. Persistence is now turned off.
!
CAUTION
Before performing the following substeps, be aware that by doing so, persistence will
NOT be supported by ANY 9A686-04 or 9A656-04 installed in this SmartSwitch 9500.
If a module is reset, ALL PVCs, and other configurations on the entire chassis will be
lost. Only experienced users should turn off persistence.

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Create aTraffic Descriptor
The following subsections provide instructions on creating a traffic descriptor profile to be assigned to the
PVC. Multiple PVCs can share the same traffic descriptor, however, the user MUST create at least one
traffic descriptor.
Step 3. Assign a value to the instance of the traffic descriptor.
The following section describes how to assign a user-defined value to the traffic descriptor to be created.
Refer to Figure 7.
Figure 7 Assigning aValue to the Traffic Descriptor
Figure 7 contains two callouts, which are defined as follows:
A
Displays the MIB command used to view this information (atmTrafficDescrRowStatus) and the OID
string used to access this command (1.3.6.1.2.1.37.1.5.1.9).
!
CAUTION
The 9A686-04 and 9A656-04 create two default traffic descriptors upon initial start-up,
however, these must NOT be used for PVCs.
A
B

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B
Points out the user-defined value that will be assigned to this Traffic Descriptor. In this example, the value
assigned is 15. The user, however, may assign any value to the descriptor as long as this value does not
already exist. For example, in the lower part of Figure 7, it is shown that Instances 3, 4 and 5 already exist
on this 9A686-04. Therefore, these values could not be assigned to this traffic descriptor.
Callout B also displays that this traffic descriptor has been set to integer 5 (“createandWait”). This setting
MUST be set first.
Step 4. Verify the traffic descriptor instance has been created.
This section describes the process used to verify that the instance set to Create and Wait status in step 3,
currently exists.
Figure 8 Verifying theTraffic DescriptorValue Assigned
Figure 8 contains two callouts, which are defined as follows:
A
Displays the MIB command used to view this information (atmTrafficDescrRowStatus) and the OID
string used to access this command (1.3.6.1.2.1.37.1.5.1.9).
!
CAUTION
Do NOT set the traffic descriptor to integer 1 (“active”) until instructed to do so.
A
B

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B
Points out that the Instance set to Create and Wait back in step 3, has been successfully created. This is
signified in Figure 8 by the Instance (15) currently assigned integer 3 (“notReady”).
Traffic Descriptors for the 9A686-04 and 9A656-04
The 9A686-04 and 9A656-04 support multiple traffic descriptors. Before assigning a traffic descriptor in
the following step, read over the next section thoroughly to decide which traffic descriptor best meets the
needs of the PVC and the network.
Table 8 provides a list of all the traffic descriptors supported by the 9A686-04 and 9A656-04. Following
Table 8, a list of definitions for all acronyms is provided.
NOTE If the Instance does not display, or displays a value other than “notReady”, verify that
the value assigned to the Instance in step 3 is a unique value.
Table 8 Traffic Descriptor Profiles
Traffic
Descriptor
Profile
Number
Traffic
Descriptor
Name Param 1 Param 2 Param 3 Param 4 Param5 Tag QoS
1 atmNoTraffic
Descriptor Best Effort
(UBR)
2 atmNoClpNo
Scr PCR
(clp=0+1) CBR
3 atmClpNoTag
gingNoScr PCR
(clp=0+1) PCR
(clp=0)
{excess tag
clp=1}
CBR
4 atmClpTaggin
gNoScr PCR
(clp=0+1) PCR (clp=0)
{excess tag
clp=1}
X CBR
5 atmNoClpScr PCR
(clp=0+1) SCR (clp=0+1) MBS RT-VBR
NRT-VBR
6 atmClpNoTag
gingScr PCR
(clp=0+1) SCR (clp=0) MBS RT-VBR
NRT-VBR
7 atmClpTaggin
gScr PCR
(clp=0+1) SCR (clp=0)
{excess tag
clp=1}
MBS X RT-VBR
NRT-VBR

PVC Addendum to the 9A686-04/9A656-04 Configuration Guide
9033126-01 Page 19 of 43
List of Acronyms
ABR - Available Bit Rate
CBR - Constant Bit Rate
clp - Cell Loss Priority
CDVT - Cell Delay Variation
MBS - Maximum Burst Size
MCR - Minimum Cell Rate
NRT-VBR - Non-Real Time Variable Bit Rate
PCR - Peak Cell Rate
RT-VBR - Real-Time Variable Bit Rate
SCR - Sustained Cell Rate
UBR - Unspecified Bit Rate
8 atmClpNoTag
gingMcr PCR
(clp=0+1) CDVT MCR ABR
9 atmClpTrans
parentNoScr PCR
(clp=0+1) CDVT CBR
10 atmClpTrans
parentScr PCR
(clp=0+1) SCR (clp=0+1) MBS CDVT RT-VBR
NRT-VBR
11 atmNoClpTag
gingNoScr PCR
(clp=0+1) CDVT X UBR
12 atmNoClpNo
ScrCdvt PCR
(clp=0+1) CDVT CBR UBR
13 atmNoClpScr
Cdvt PCR
(clp=0+1) SCR (clp=0+1) MBS CDVT RT-VBR
NRT-VBR
14 atmClpNoTag
gingScrCdvt PCR
(clp=0+1) SCR (clp=0) MBS CDVT RT-VBR
NRT-VBR
15 atmClpTaggin
gScrCdvt PCR
(clp=0+1) SCR (clp=0)
{excess tag
clp=1}
MBS X RT-VBR
NRT-VBR
Table 8 Traffic Descriptor Profiles (Continued)
Traffic
Descriptor
Profile
Number
Traffic
Descriptor
Name Param 1 Param 2 Param 3 Param 4 Param5 Tag QoS

PVC Addendum to the 9A686-04/9A656-04 Configuration Guide
9033126-01 Page 20 of 43
Step 5. Assign the ATM traffic descriptor type.
This section describes how to set an ATM traffic descriptor type for the user defined instance. In this
example, theATM traffic descriptor “atmNoClpScr”, which signifies a Variable Bit Rate (VBR)
connection, is used. In addition, this connection will have a Sustained Cell Rate (SCR) of 500 cells a
second, with a Peak Cell Rate (PCR) of 1000 cells a second and Maximum Burst Size (MBS) of 75. Refer
to Figure 9.
Figure 9 Assigning theTraffic DescriptorType
Figure 9 contains two callouts, which are described as follows:
A
Displays the MIB command used to view this information (atmTrafficDescrType) and the OID string
used to access this command (1.3.6.1.2.1.37.1.5.1.2).
B
Points out the user-defined Instance (value 15), and how the Instance is about to be set to “atmNoClpScr”
and the OID string that this setting uses (1.3.6.1.2.1.37.1.1.5). This OID string represents aVBR
connection with no Cell Loss Priority (CLP).
A
B