Setup guide

4-10
Cisco 6400 Software Setup Guide
OL-1183-04
Chapter4 Node Line Card Interface Configuration
DS3 NLC Interface Options
DS3 NLC Interface Options
The DS3 NLC supports the following framing modes:
• cbitadm—C-bit with ATM direct mapping (default framing mode)
• cbitplcp—C-bit with physical layer convergence procedure (PLCP) framing
• m23adm—M23 ATM direct mapping
• m23plcp—M23 with PLCP framing
The DS3 NLC supports the cell payload scrambling mode, which scrambles only the payload of the cell
(not the header). Cell payload scrambling is turned off by default.
The DS3 NLC defaults to a short line buildout, which supports cables less than 50 feet long. If the cable
attached to the DS3 interface is longer than 50 feet, you must configure the long line buildout.
The DS3 NLC automatic far-end receive failure (FERF) alarms support the following values, all turned
on by default:
• los—Loss of signal
• oof—Out of frame
• red—Indicates a major alarm
• ais—Alarm indication signal
• lcd—Loss of cell delineation
Configuring the DS3 Interface Options
To manually change any of the default configuration values, complete the following steps, beginning in
global configuration mode:
Example
In the following example, the DS3 interface ATM 3/0/0 is configured for C-bit with the ATM direct
mapping framing mode and a short line buildout.
!
interface atm 3/0/0
framing cbitadm
lbo short
!
Command Purpose
Step1
Switch(config)# interface atm slot/subslot/port
Specifies an ATM interface and
enters interface configuration
mode.
Step2
Switch(config-if)# framing {cbitadm | cbitplcp | m23adm | m23plcp}
Modifies the framing mode.
Step3
Switch(config-if)# [no] scrambling cell-payload
Enables or disables the scrambling
mode.
Step4
Switch(config-if)# lbo {long | short}
Modifies the line buildout.
Step5
Switch(config-if)# [no] auto-ferf {ais | lcd | los | oof | red}
Modifies the automatic FERF
configuration.