18-6
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 18
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, beginning 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, with 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
Step 1
Switch(config)#
interface atm
card
/
subcard
/
port
Switch(config-if)#
Specifies an ATM interface and enters interface
configuration mode.
Step 2
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.
Step 3
Switch(config-if)#
atm maxvpi-bits
max-vpi-bits
Modifies the maximum VPI bits configuration.
Step 4
Switch(config-if)#
atm maxvci-bits
max-vci-bits
Modifies the maximum VCI bits configuration.
Step 5
Switch(config-if)#
sonet
{
stm-1
|
sts-3c
}
Modifies the framing mode.
Step 6
Switch(config-if)#
clock source
{
free-running
|
loop-timed
|
network-derived
}
Modifies the clock source.
Step 7
Switch(config-if)#
scrambling
{
cell-payload
|
sts-stream
}
Modifies the scrambling mode.
