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8-2 Riverstone Networks RS Switch Router User Guide Release 8.0
Configuring ATM Ports ATM Configuration Guide
8.1 CONFIGURING ATM PORTS
You can use two different ATM line cards on the RS, the ATM multi-rate line card and the ATM-OC12 line card. The
multi-rate line card has two available slots for various Physical Layer (PHY) interface cards. These PHY cards provide
the media-specific portion of an ATM interface. The ATM-OC12 line card provides one logical connection through
two physical ports (Link1 and Link 2). For additional information on these modules, refer to the Riverstone RS Switch
Router Getting Started Guide.
This section describes the various commands you can use to control the functionality of the ports on the ATM line
cards. Use the “at” prefix when specifying an ATM port in the CLI commands. For example, the first port on slot 5
would be “at.5.1.”
8.1.1 Configuring SONET Parameters
ATM utilizes synchronous optical network (SONET) encapsulation to transmit cells through a link. You can configure
the following SONET features on the ATM line cards:
•
Set the Circuit-ID
•
Set SONET/SDH Framing
•
Set Loopback Mode
•
Enable Path Tracing
•
Enable Payload Scrambling
•
Enable Stream Scrambling
Note
For a complete description of the SONET features, refer to Section 9,
"Packet-over-SONET Configuration Guide." Refer to the SONET chapter in the
Riverstone RS Switch Router Command Line Interface Reference Manual for a
description of the SONET commands.
Configuring Automatic Protection Switching (APS) on the ATM OC-12 Line Card
You can configure APS on the ATM OC-12 line card. This allows for redundancy for the ATM port in case there is an
interruption or failure on a link. APS specifies a working port (primary) and a protecting port (backup).
The ATM OC-12 line card has two physical ports: Link1 and Link2. However, there is only one logical port. The
Link1 port is the working port (primary port), and Link2 is the protecting port (backup port). Note that you cannot
configure a connection on the Link2 port that is different from the Link 1 port. The Link2 port operates identically to
the Link1 port, acting solely as the backup port in the case of link interruption or failure.
Note
Refer to the SONET Chapter in the Riverstone RS Switch Router Command Line
Interface Reference Manual for a complete description of the APS commands
available on the Riverstone RS Switch Router.