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The LightStream 1010 ATM switch is Cisco System's Asynchronous Transfer Mode (ATM) switch for workgroup and campus backbone deployment. Incorporating support for the latest ATM Forum specifications and building upon the Cisco System's Internetwork Operating System (IOS(TM)) software, the LightStream 1010 offers the most complete, sophisticated feature set of any ATM switch in its class. It also provides the performance, scalability, and robustness required for production ATM deployment.
The LightStream 1010 uses a five-slot, modular chassis featuring the option of dual, fault-tolerant, load-sharing AC or DC power supplies (see Figure 1-1). The central slot in the LightStream 1010 is dedicated to a single, field-replaceable ATM switch processor (ASP) module that provides a five-Gbps shared memory based nonblocking switch fabric. The ASP also supports the Feature Card and high-performance Reduced Instruction Set (RISC) processor that provides the central intelligence for the device. The remaining slots support up to four hot-swappable carrier modules (CMs). Each CM supports up to two hot-swappable port adapter modules (PAMs) for a maximum of eight PAMs per switch, supporting a wide variety of desktop, backbone, and wide-area interfaces.
See the following documents for detailed ASP and PAM configuration information:
The LightStream 1010 ATM switch should be installed in a standard 19-inch (48-centimeter) rack.
The LightStream 1010 ATM switch provides the following features:
ATM technology now plays a central role in the evolution of current workgroup, campus and enterprise networks. ATM delivers important advantages over existing LAN and WAN technologies, including the promise of scalable bandwidths at unprecedented price and performance points and QOS guarantees. These features allow many new classes of applications, such as multimedia, to use ATM technology.
These benefits, however, come at a price. Contrary to common misconceptions, ATM is a very complex technology, perhaps the most complex ever developed by the networking industry. Whereas the structure of ATM cells and cell switching do facilitate the development of hardware-intensive, high-performance ATM switches, the deployment of ATM networks requires the overlay of a highly complex, software intensive, protocol infrastructure. This infrastructure is required to allow both individual ATM switches to be linked into a network, and for such networks to function with the vast installed base of existing local and wide-area networks.
See the LightStream 1010 ATM Software Configuration Guide and LightStream 1010 ATM Switch Command Reference for detailed description of ATM functions and network configuration.
The LightStream 1010 ATM switch provides Layer 2 switching, with both local and remote management.
Figure 1-2 shows an example of a network configuration using the LightStream 1010 ATM switch in a high-performance workgroup.
Figure 1-3 shows an example of a network configuration using the LightStream 1010 ATM switch for a campus backbone.
Figure 1-4 shows an example of a network configuration using the LightStream 1010 ATM switch in a multisite network.
Figure 1-5 shows an example of a network configuration using the LightStream 1010 ATM switch in a LANE network.
Figure 1-6 shows an example of a network configuration in which private switches form a private network interconnected over permanent VPs. These VPs provide logical trunks tunnelling across a public network.
See the LightStream 1010 ATM Switch Software Configuration Guide for detailed software information and configuration including the following:
This section describes functions that support and maintain the LightStream 1010 ATM switch. The hot-swapping feature for modules and the redundant hot swapping for power supplies enable you to quickly install new equipment without interrupting system power or shutting down interfaces. The environmental monitoring and reporting functions continuously monitor temperature and voltage points in the system, and provide reports and warning messages that enable you to quickly locate and resolve problems and maintain uninterrupted operation. The redundant power option provides dual load-sharing power supplies. In the event of a power-supply failure, or a failure of one of two separate AC power sources, the redundant power option assures uninterrupted operation.
You can install any combination of PAMs in any of the eight available PAM slots. There are no restrictions on either the number of modules that can be installed or their proximity to the ASP. See the LightStream 1010 ATM Switch PAM Installation Guide for detailed port density information.
The hot-swapping feature allows you to install and replace PAMs while the system is operating; you do not need to disable the software or shut down the system power. All PAMs support hot-swapping.
 | Caution The ASP is a required system component. Removing an ASP while the system is operating will cause the system to shut down, and may damage the processor. |
The environmental monitoring functions use three levels of status conditions to monitor the system: normal, alarm, and critical. The processor monitors the temperature inside the module compartment, and the power supplies use the normal and critical levels to monitor DC voltages. Table 1-1 lists temperature thresholds for the processor-monitored levels. Table 1-2 lists the DC power thresholds for the normal and critical power-supply-monitored levels.
| Parameter | Normal | Alarm |
|---|---|---|
Airflow | 10-55ºC | > 55ºC |
| Parameter | Critical | Normal | Critical |
|---|---|---|---|
+5V | < 4.74V | 4.74-5.26V | > 5.26V |
The three levels of status condition includes:
The power supply monitors its own internal temperature and voltages. The power supply is either within tolerance (normal) or out of tolerance (alarm level), as shown in Table 1-2. If an internal-power-supply temperature or voltage reaches a critical level, the power supply shuts down without any interaction with the processor.
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