18-6
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter18 Configuring Interfaces
Configuring 622-Mbps SM and MM Interfaces
Synchronous Transfer Signal (STS) stream scrambling = on
Cell payload scrambling = on

Manual OC-3c MMF Interface Configuration (Catalyst 8540 MSR)

To manually change any of the default configuration values, perform the following steps, beginn ing in
global configuration mode:
Example
The following example configures ATM interface 3/0/1 as the network side of a private UNI running
version 3.1.
Switch# interface atm 3/0/1
Switch(config-if)# no atm auto-configuration
Switch(config-if)#
%ATM-6-ILMINOAUTOCFG: ILMI(ATM3/0/1): Auto-configuration is disabled, current interface
parameters will be used at next interface restart.
Switch(config-if)# atm uni version 3.1
See Troubleshooting the Interface Configuration, page 18-17 to confirm your interface configuration.
Configuring 622-Mbps SM and MM Interfaces
These interfaces are used for intercampus or wide-area links.
The 622-Mbps SONET STS12/SDH STM4 port adapter has a single port. You can configure your switch
with only the number and type of interfaces required, w ith up to eight 622-Mbps interface ports.
Note The configuration instructions in this section also apply to the ATM Fabric Integration Module.
The port adapter supports an SC-type connector, and receive and transmit LEDs give quick, visual
indications of port status and operation.
Command Purpose
Step1 Switch(config)# interface atm card/subcard/port
Switch(config-if)#
Specifies an ATM interface and enters interface
configuration mode.
Step2 Switch(config-if)# atm uni [side {private |
public}] [type {network | user}] [version {3.0 |
3.1 | 4.0}]
Modifies the ATM interface side, type, or version.
Step3 Switch(config-if)# atm maxvpi-bits max-vpi-bits Modifies the maximum VPI bits configuration.
Step4 Switch(config-if)# atm maxvci-bits max-vci-bits Modifies the maximum VCI bits configuration.
Step5 Switch(config-if)# sonet {stm-1 | sts-3c} Modifies the framing mode.
Step6 Switch(config-if)# clock source {free-running |
loop-timed | network-derived}
Modifies the clock source.
Step7 Switch(config-if)# scrambling {cell-payload |
sts-stream}
Modifies the scrambling mode.