18-4
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter18 Configuring Interfaces
Configuring 155-Mbps SM, MM, and UTP Interfaces
Note The 155-Mbps port adapter supports mixed mode. Port 0 is a single-mode interface and ports 1
through 3 are multimode interfaces.
The port adapter supports SC-type and unshielded twisted-pair (UTP) connectors, while receive and
transmit LEDs on each port give quick, visual indications of port status and operation.
Traffic pacing allows 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.
Default 155-Mbps ATM Interface Configuration without Autoconfiguration
If Integrated Local Management Interface (ILMI) has been disabled or if the connecting end node does
not support ILMI, the following defaults are assigned to all 155-Mbps interfaces:
ATM interface type = UNI
UNI version = 3.0
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
Manual 155-Mbps Interface Configuration
To manually change any of the default configuration values, perform the following steps, beginn ing in
global configuration mode:
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 {network |
user}] [type {private | public}]
[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 configuratio n.
Step5 Switch(config-if)# sonet {stm-1 | sts-3c} Modifies the framing mode.