Overview of the ASP

This chapter describes the LightStream 1010 Asynchronous Transfer Mode (ATM) switch processor (ASP), shown in Figure 1-1. The ASP card resides in slot 2 of the LightStream 1010 ATM switch chassis or in slot 13 of the Catalyst 5500 switch. This card contains the main system processor that includes the ATM switching engine and network management processor for the system software and most of the system memory components. The ASP maintains and executes the management functions that control the LightStream 1010 ATM switch.

Figure 1-1: ASP Card

Features of the ASP

The ASP features include the following:

• Virtual path (VP) and virtual channel (VC) support

• 5-Gbps switching fabric

• MultiChannel Interface Processor (MIP) architecture R4700 microprocessor at 100 MHz internally, 50-MHz system interface

• Three memory components:

  • Two dynamic random-access memory (DRAM) single in-line memory modules (SIMMs) for storing incoming and outgoing packets, queues, and caches (32-MB default for the feature card per-class queueing [FC-PCQ] or 64-MB default for the feature card per-flow queueing [FC-PFQ])

  • One Flash memory SIMM for storing the system software image (8-MB default, upgradable to 16 MB)

  • Two Personal Computer Memory Card International Association (PCMCIA) card slots for additional Flash memory

• Air-temperature sensor for environmental monitoring

• Console serial port for connection to a terminal or a modem

• Auxiliary serial port for connection to a modem

• Ethernet port for connection to a Simple Network Management Protocol (SNMP) management station

In addition to these features, the ASP performs the following management functions:

• Monitors interface and environmental status

• Provides SNMP management and the console/Telnet interface

Flash Memory SIMM

The Flash memory SIMM allows you to load and store system software images remotely. You can download a new software image over the network, or from a local server, and add the new image to Flash memory or replace an existing image.

LEDs

The LEDs on the ASP indicate the status of the ASP, fan assembly, and power supplies. (See Figure 1-2.)

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Note For detailed descriptions of the ASP LEDs, refer to the section "Module LEDs" in the chapter "Checking the ASP Installation."

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Figure 1-2: LEDs

Reset Switch

The reset switch is at the left side of the ASP faceplace, through a small hole between two columns of LEDs. You can use the reset switch when a software-initiated reset is not possible. (See Figure 1-2.)

Ethernet Port

The ASP includes one RJ-45 Ethernet port (labeled Enet) that you can use to connect a management workstation for SNMP management. (See Figure 1-2.)

PCMCIA Card Slots

The ASP includes two PCMCIA card slots into which you can install up to two Type II Flash memory cards. (See Figure 1-3.) You can store the system software and configuration information on these cards. You can also configure the system to boot from a software image stored on the Flash memory card.

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Note For detailed descriptions of the Flash memory card, refer to the section "Installing and Removing Flash Memory Cards" in the chapter "Installing the ASP."

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Figure 1-3: PCMCIA Card Slots

Auxiliary and Console Ports

The ASP includes one auxiliary port (labeled AUX) and one console port (labeled CONSOLE), shown in Figure 1-4.

Figure 1-4: Console and Auxiliary Ports

The auxiliary port is a male Electronics Industries Association/Telecommunications Industry Association (EIA/TIA)-232, data terminal equipment (DTE), DB-25 plug, used for connection to a modem.

The console port is a female, EIA/TIA-232, data communications equipment (DCE), DB-25 receptacle, used for connection to a console terminal or modem.

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Note EIA/TIA-232 and EIA/TIA-449 were known as recommended standards RS-232 and RS-449 before their acceptance as standards by the Electronic Industries Association (EIA) and Telecommunications Industry Association (TIA).

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Feature Card

The feature card (see Figure 1-5) is a daughter card on the ASP. The feature card provides a number of value-added features in addition to the basic switch functionality.

Figure 1-5: Feature Card

Features

There are two types of feature cards available for the LightStream 1010 ATM switch: the feature card per-class queueing (FC-PCQ) and feature card per-flow queueing (FC-PFQ). Each card provides the required ATM Forum Traffic Management features. FC-PCQ provides a subset of the features provided by FC-PFQ, as described in Table 1-1.

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Note To determine which feature card you have, enter the show hardware privileged EXEC command. Either FeatureCard1 (FC-PCQ) or FC-PFQ displays in the Ctrlr-Type column.

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Table 1-1: FC-PCQ and FC-PFQ Feature Comparison

Feature	FC-PCQ	FC-PFQ
Traffic classes	CBR1, RT-VBR2, NRT-VBR3, ABR4 (EFCI5 and RR6), UBR7	CBR, RT-VBR, NRT-VBR, ABR (EFCI and RR), UBR
Output queuing	Four classes per port	Per-VC or per-VP
Output scheduling	SP8	SP, RS9, and WRR10
Intelligent early packet discard	Multiple fixed thresholds	Multiple, weighted, dynamic thresholds
Intelligent tail (partial) packet discard	Supported	Supported
Selective cell marking and discard	Multiple fixed thresholds	Multiple, weighted, dynamic thresholds
Shaping	Per-port (pacing)	Per-VC or per-VP (128 shaped VP tunnels)
Policing (UPC11)	Dual mode, single leaky bucket	Dual leaky bucket
Frame mode VC-merge	-	Supported
Point-to-multipoint VC (multicast)	One leaf per output port, per point-to-multipoint	Multiple leafs per output port, per point-to-multipoint
Network clock switchover	Automatic upon failure	Programmable clock selection criteria
Nondisruptive snooping	Per-port transmit or receive	Per-VC, per-VP, or per-port

Maximum Switch Configuration

Table 1-2 lists the maximum switch configuration for the feature cards.

Table 1-2: Maximum Switch Configuration for the Feature Cards

Feature	FC-PCQ	FC-PFQ
Cell buffer	64K cells	64K cells
Point-to-point VCs	64K	64K
Point-to-multipoint VCs	1098	64K
Point-to-multipoint leafs1	32 per IVC	254 per input root