|
|
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.
The ASP features include the following:
In addition to these features, the ASP performs the following management functions:
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.
The LEDs on the ASP indicate the status of the ASP, fan assembly, and power supplies. (See Figure 1-2.)
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.)
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.)
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.
The ASP includes one auxiliary port (labeled AUX) and one console port (labeled CONSOLE), shown in Figure 1-4.
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.
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.
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.
| Feature | FC-PCQ | FC-PFQ |
|---|---|---|
Traffic classes | CBR, RT-VBR, NRT-VBR, ABR (EFCI and RR), UBR | |
Output queuing | Four classes per port | Per-VC or per-VP |
Output scheduling | SP8 | |
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 |
Table 1-2 lists the maximum switch configuration for the feature cards.
| Feature | FC-PCQ | FC-PFQ |
|---|---|---|
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 |
| 1Maximum leaves per LightStream 1010 ATM switch (both feature cards) is 128K. |
|
|