The ATM Router Module

This chapter describes the ATM Router Module that is supported in the Catalyst 8540 MSR.

This chapter includes the following sections:

Overview of the ATM Router Module

The ATM Router Module provides the Catalyst 8540 MSR with high-speed internetworking between the Layer 2 and Layer 3 network topologies. When the
ATM Router Module is installed, you no longer need to choose either Layer 3 or ATM technology, as is frequently the case with enterprise and metropolitan area applications. You can have both Layer 3 and ATM technologies in the same multiservice ATM switch router chassis.

The Catalyst 8540 MSR equipped with ATM Router Module functionality provides Ethernet-ATM and ATM-ATM bridging and routing.The ATM Router Module offers interoperability between the Layer 3 switching interface modules used in the Catalyst 8540 CSR and the ATM port adapters and interface modules used in the Catalyst 8540 MSR chassis. You can therefore combine Layer 3 and ATM port adapters and interface modules in a Catalyst 8540 MSR chassis equipped with the ATM Router Module.

Note For information on how to configure the Layer 3 modules that interoperate with the ATM Router Module in the Catalyst 8540 MSR chassis, refer to the Catalyst 8540 Campus Switch Router Interface Module and Route Processor Installation Guide and the Layer 3 Software Feature and Configuration Guide.

The ATM Router Module has two internal interfaces to the route processor across the backplane. Each interface provides switching at 1 Gbps between Layer 2 and Layer 3 in the ATM switch. The ATM Router Module is a full-width module that occupies the entire slot in the ATM switch. (See Figure 15-1.) You can install up to two ATM Router Modules in slots numbered 0-3 and 9-12 in the Catalyst 8540 MSR chassis.

Figure 15-1: ATM Router Module

Note The ATM Router Module is hot-swappable. When hot swapping an ATM Router Module, wait 1 minute after removing the module and installing a new module.

ATM Connections Supported

You can use the ATM Router Module for high-speed enterprise campus and metropolitan-area networks. The Catalyst 8540 MSR equipped with the
ATM Router Module is an ideal solution where an ATM infrastructure already exists or where ATM is the desired backbone solution. The ATM Router Module performs Gigabit Ethernet and ATM internetworking seamlessly on a single platform. You can use the
ATM Router Module in campuses that are migrating from ATM to Gigabit Ethernet. The ATM Router Module allows you to use Gigabit Ethernet for wiring closet uplinks in an existing ATM backbone.

The Catalyst 8540 MSR equipped with the ATM Router Module can be used either as a core or an edge device in an ATM network. (See Figure 15-2)

Figure 15-2: Catalyst 8540 MSR Using the ATM Router Module as a Core and an Edge Device

ATM Router Module LEDs

The status LED provides information for the two internally looped back gigabit interfaces on the ATM Router Module. The LEDs are shown in Figure 15-3 and described in Table 15-1.

Figure 15-3: ATM Router Module LED

Table 15-1: ATM Router Module LED Description

LED State Description

Status

Green

Microcode download successful

Red

Microcode download not successful

LED	State	Description
Status	Green	Microcode download successful
Status	Red	Microcode download not successful

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