System information

Chapter 3 Initially Configuring the ATM Switch Router
Modifying the Physical Layer Configuration of an ATM Interface
3-6
ATM Switch Router Software Configuration Guide
78-6277-03, Cisco IOS Release 12.0(13)W5(19)
Manually Setting the ATM Address
To configure a new ATM address that replaces the previous ATM address when running IISP software
only, see the “Configuring the ATM Address” section on page 10-5.
To configure a new ATM address that replaces the previous ATM address and generates a new PNNI
node ID and peer group ID, see the “Configuring an ATM Address and PNNI Node Level” section on
page 10-10.
ModifyingthePhysicalLayerConfigurationofanATMInterface
Each of the ATM switch router’s physical interfaces has a default configuration, listed in Chapter 17,
“Configuring Interfaces.” You can accept the defaults, or you can override them by reconfiguring the
physical interface.
The following example describes modifying an OC-3c interface from the default settings to the
following:
• Disable scrambling cell-payload.
• Disable scrambling STS-streaming.
• Change Synchronous Optical Network (SONET) mode of operation from Synchronous Time Stamp
level 3c (STS-3c) mode to Synchronous Transfer Module level 1 (STM-1).
To change the configuration of the example interface, perform the following steps, beginning in global
configuration mode:
Example
The following example shows how to disable cell-payload scrambling and STS-stream scrambling and
changes the SONET mode of operation to Synchronous Digital Hierarchy/Synchronous Transfer
Module 1 (SDH/STM-1) of OC-3c physical interface ATM 0/0/0:
Switch(config)# interface atm 0/0/0
Switch(config-if)# no scrambling cell-payload
Switch(config-if)# no scrambling sts-stream
Switch(config-if)# sonet stm-1
To change any of the other physical interface default configurations, refer to the commands in the
ATM Switch Router Command Reference publication.
Command Purpose
Step 1
Switch(config)# interface atm card/subcard/port
Switch(config-if)#
Selects the physical interface to be configured.
Step 2
Switch(config-if)# no scrambling cell-payload Disables cell-payload scrambling.
Step 3
Switch(config-if)# no scrambling sts-stream Disables STS-stream scrambling.
Step 4
Switch(config-if)# sonet stm-1 Configures SONET mode as SDH/STM-1.