Table of Contents

NI-2 Subtending Support
Configuring 155 Mbps SM and MM Interfaces

Default 155 Mbps ATM Interface Configuration Without Autoconfiguration
Manual 155 Mbps Interface Configuration

Configuring DS3 and E3 Interfaces

Default DS3 ATM Interface Configuration Without Autoconfiguration
Manual DS3 and E3 Interface Configuration

Interface Configuration Troubleshooting

Configuring the Trunk and Subtended Interfaces

This chapter describes the steps required to configure the trunk and subtended interfaces on the Cisco DSLAM NI-2 card. This chapter includes these sections:

• Configuring 155 Mbps SM and MM Interfaces

• Configuring DS3 and E3 Interfaces

• Interface Configuration Troubleshooting

NI-2 Subtending Support

NI-2 cards offer the same level of service and traffic fairness in subtending Cisco 6100, Cisco 6260 and Cisco 6130 nodes. The level of service remains the same for both NI-1 and NI-2 based subtended nodes. (That is, you can mix NI-1 and NI-2 cards in the same subtending network.)

The following guidelines apply to subtending on an NI-2 supported DSLAM:

• The NI-2 accepts the same VP/VC constraints that exist on the NI-1.

• The NI-2 allows subtending for up to 1664 ports per system.

• The NI-2 supports tree and daisy chain subtending.

Configuring 155 Mbps SM and MM Interfaces

You can configure the NI-2 ports as redundant links using the switch routing protocols. The NI-2 card supports system controller-type connectors.

Each port can be configured to support these clocking options:

• Self-timing based on a Stratum three-level clock

• Loop timing from the received data stream—Ideal for public network connections

• Timing synchronized to a selected master clock port—Required to distribute a single clock across a network

Traffic pacing allows you to set the aggregate output traffic rate on any port to be set to a rate below the line rate. This feature is useful when communicating with a slow receiver or when connected to public networks with peak-rate tariffs.

The plug-and-play mechanisms of the DSLAM allow the interface to launch automatically. You can save all configuration information between hot swaps and reboots, while interface types are automatically discovered by the DSLAM, eliminating the need for mandatory manual configuration.

Default 155 Mbps ATM Interface Configuration Without Autoconfiguration

If Interim Local Management Interface (ILMI) has been disabled or if the connecting end node does not support ILMI, these defaults are assigned to all 155 Mbps (OC-3c) interfaces:

• ATM interface type = UNI

• UNI Version = 3.1

• Maximum virtual path identifier (VPI) bits = 8

• Maximum virtual channel identifier (VCI) bits = 14

• ATM interface side = network

• ATM UNI type = private

• Framing = sts-3c

• Clock source = network-derived

• Synchronous Transfer Signal (STS) stream scrambling = on

• Cell payload scrambling = on

The default subtend ID for each NI-2 DSLAM is 0 (zero).

Manual 155 Mbps Interface Configuration

To manually change any of the default configuration values, perform these tasks, beginning in global configuration mode. Note that Step 1. and Step 9. are alternatives; do not perform both steps.

Step	Command	Task
1.	subtend-id 0-12	Assign to this node a subtend ID that is unique in the subtend tree. The node attached to the trunk must have subtend ID0.
2.	interface atm slot/port	Specify an ATM interface and enter interface configuration mode.
3.	atm uni [side {private | public} type {network | user} version {3.0 | 3.1 | 4.0}]	Modify the ATM interface side, type, or version.
4.	atm maxvpi-bits 0-8	Modify the maximum VPI bits configuration.
5.	atm maxvci-bits 0-14	Modify the maximum VCI bits configuration.
6.	sonet {stm-1 | sts-3c}	Modify the framing mode.
7.	clock source {free-running | loop-timed | network-derived}	Modify the clock source.
8.	scrambling {cell-payload | sts-stream}	Modify the scrambling mode.
9.	subtend-id 0-12	Assign to this interface a subtend ID that is unique in the subtend tree. (This subtend ID identifies the subtended node attached to the interface, in the case where the attached node does not support the subtend ID feature.)

Examples

This example shows how to change the default ATM interface type to private using the atm uni type private command:

DSLAM# configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
DSLAM(config)# interface atm 0/0
DSLAM(config-if)# 
 

This example shows how to change the clock source using the clock source network-derived command:

DSLAM# config term
Enter configuration commands, one per line.  End with CNTL/Z.
DSLAM(config)# interface atm 0/0
DSLAM(config-if)# clock source network-derived
 

Refer to the "Interface Configuration Troubleshooting" section, to confirm your interface configuration.

Configuring DS3 and E3 Interfaces

Use the 45-Mbps DS3 to:

• Set up wide-area connections

• Link multiple campuses

• Connect to public networks

The ports can be set up as redundant links, for use by sophisticated switch routing protocols.

You can configure each port to support these clocking options:

• Self-timing based on a Stratum 4 level clock

• Loop timing from the received data stream—Ideal for public network connections

• Timing synchronized to a selected master clock port—Required to distribute a single clock across a network

Note   Network clocking configuration options are applicable only to DS3 quad interfaces.

Traffic pacing allows you to set the aggregate output traffic rate on any port to a rate below the line rate. This feature is useful when communicating with a slow receiver or when connected to public networks with peak-rate tariffs.

The plug-and-play mechanisms of the DSLAM allow the interface to launch automatically. You can save all configuration information between hot swaps and reboots, while interface types are automatically discovered by the DSLAM, eliminating the need for mandatory manual configuration.

Default DS3 ATM Interface Configuration Without Autoconfiguration

If ILMI has been disabled or if the connecting end node does not support ILMI, these defaults are assigned to all DS3 interfaces:

• ATM interface type = UNI

• UNI Version = 3.0

• Maximum VPI bits = 8

• Maximum VCI bits = 14

• ATM interface side = network

• ATM UNI type = private

These defaults are assigned to all DS3 interfaces:

• Framing = cbit-adm

• Cell payload scrambling = off

• Clock source = network-derived

• LBO = short

• Auto-ferf on loss of signal (LOS) = on

• Auto-ferf on out of frame (OOF) = on

• Auto-ferf on red = on

• Auto-ferf on loss of cell delineation (LCD ) = on

• Auto-ferf on alarm indication signaling (AIS) = on

These defaults are assigned to all E3 interfaces:

• Framing = G.832 adm

• Cell payload scrambling = on

• Clock source = network-derived

• Auto-ferf on LOS = on

• Auto-ferf on OOF = on

• Auto-ferf on LCD = on (applicable to nonplcp mode only)

• Auto-ferf on AIS = on

Manual DS3 and E3 Interface Configuration

To manually change any of the DS3 or E3 default configuration values, perform these tasks, beginning in global configuration mode. Note that Step 1. and Step 12. are alternatives; do not perform both steps.

Step	Command	Task
1.	subtend-id 0-12	Assign to this node a subtend ID that is unique in the subtend tree. The node attached to the trunk must have subtend ID0.
2.	interface atm slot/port	Specify an ATM interface and enter interface configuration mode.
3.	atm uni [side {private | public} type {network | user} version {3.0 | 3.1 | 4.0}]	Modify the ATM interface side, type, or version.
4.	atm maxvpi-bits 0-8	Modify the maximum VPI bits configuration.
5.	atm maxvci-bits 0-14	Modify the maximum VCI bits configuration.
6.	framing {cbitadm | cbitplcp | m23adm | m23plcp}	Modify the framing mode.
7.	scrambling {cell-payload | sts-stream}	Modify the scrambling mode.
8.	clock source {free-running | loop-timed | network-derived}	Modify the clock source.
9.	network-clock-select {1-4_priority} atmslot/port	Configure the network-derived clock.
10.	lbo {long | short}	Modify the line build-out.
11.	auto-ferf {ais | lcd | los | oof | red}	Modify the auto-ferf configuration.
12.	subtend-id 0-12	Assign to this interface a subtend ID that is unique in the subtend tree. (This subtend ID identifies the subtended node attached to the interface, in the case where the attached node does not support the subtend ID feature.)

Examples

This example shows how to change the default ATM interface type to private using the atm uni type private command:

DSLAM# configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
DSLAM(config)# interface atm 0/0
DSLAM(config-if)# atm uni type private
 

This example shows how to change the clock source using the clock source network-derived command:

DSLAM# config term
Enter configuration commands, one per line.  End with CNTL/Z.
DSLAM(config)# interface atm 0/0
DSLAM(config-if)# clock source network-derived
 

Refer to the section "Interface Configuration Troubleshooting", to confirm your interface configuration.

Interface Configuration Troubleshooting

Table 16-1 describes commands that you can use to confirm that the hardware, software, and interfaces for the DSLAM are configured as intended:

Table 16-1: Configuration Testing Commands

Command	Description
show version	Confirm the correct version and type of software is installed.
show hardware	Confirm the type of hardware installed in the system.
show interface ethernet	Confirm the type of hardware installed in the system.
show atm addresses	Confirm the ATM address is configured correctly.
ping atm	Test for connectivity between the DSLAM and a host.
show {atm | ces} interface	Confirm the ATM interfaces are configured correctly.
show atm status	Confirm the status of the ATM interfaces.
show atm vc	Confirm the status of ATM virtual interfaces.
show running-config	Confirm the configuration being used is configured correctly.
show startup-config	Confirm the configuration saved in NVRAM is configured correctly.
show controller {atm | ethernet}	Confirm interface controller memory addressing.

Posted: Tue Sep 19 10:48:23 PDT 2000
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