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This chapter describes cabling and configuration procedures for the LightStream 1010 ATM switch 12-port, 25-Mbps port adapter modules (PAMs). When your switch leaves the factory, it is configured as specified in your order and is ready for installation and startup. As your communication requirements change, you might want to upgrade your system, add components, or change the initial configuration.
Software and upgrades require specific document part numbers and other frequently updated information; therefore, only basic software configuration guidelines are included in this publication. Detailed, up-to-date instructions are included in the LightStream 1010 ATM Switch Software Configuration Guide. Command-line interface (CLI) command descriptions are provided in the LightStream 1010 ATM Switch Command Reference publication.
This chapter contains the following sections:
The 25-Mbps PAM has 12 25.6-Mbps ATM ports. Each port is compliant with the ATM Forum PHY standard for 25.6 Mbps over twisted-pair cable and is ideal for workgroup links (see Figure 8-1). Any of the 12 ports on the PAM can be configured as redundant links using the switch routing protocols. The PAM has a 96-pin Molex connector and a multileg 12 RJ-45 cable assembly.
Each port on the PAM supports single, local clocking only.
Traffic pacing allows the aggregate output traffic rate on port group 0 to 5 or 6 to 11 to be set to a rate below the line rate; this is useful when communicating with a slow receiver. Pacing cannot be done on any individual port, only on a group of six ports.
The LightStream 1010 supports any PAM combination. You can configure your switch with only the number and type of interfaces required, with up to 96 25-Mbps ports.
The 25-Mbps PAM has 12 ports and is ideal for workgroup links. Figure 8-2 is an example of the 25-Mbps PAM application.
The various 25-Mbps PAMs provide 12 UTP-5 interface connections from the desktop to the wiring closet.
All ATM interfaces are full duplex. You must use the appropriate ATM interface cable to connect the ATM UTP PAM interface with an external ATM network.
This section describes the ATM connectors and 25-Mbps PAM network connections and LEDs.
The 96-pin Molex connector is used to connect the 12 RJ-45 UTP to the end workstations. See the section "ATM Connection Equipment" in the chapter "Installing the LightStream 1010 ATM Switch PAMs" for a description of a 96-pin Molex connector.
For UTP traffic, use the RJ-45 connector to connect the 25-Mbps PAM to the workstations. See the section "ATM Connection Equipment" in the chapter "Installing the LightStream 1010 ATM Switch PAMs" for a description of an RJ-45 connector.
The 25-Mbps PAMs provide an interface to ATM end workstations for transmitting and receiving data at up to 25.6 Mbps bidirectionally. The PAM LEDs provide status information for the individual interface connections. (See Figure 8-3.)
Connect the ATM interface cables as shown in Figure 8-3. For detailed descriptions of ATM cabling requirements, refer to the sections "ATM Connection Equipment" and "ATM Connection Equipment" in the chapter "Installing the LightStream 1010 ATM Switch PAMs."
The ATM PAMs provide an interface to ATM switching fabrics for transmitting and receiving data at up to 25 Mbps bidirectionally over 12 interfaces.
The LEDs provide status information for the individual 25-Mbps interface connections. The LEDs are shown in Figure 8-3 and described in Table 8-1.
| LED | Description |
|---|---|
Off---No receive line activity |
| 1FERF = far-end receive failure. 2LCD = loss of cell delineation. |
When the switch is powered on initially without any previous configuration data, the ATM interfaces are automatically configured on the physical ports. The Interim Local Management Interface (ILMI) and the physical card type are used to automatically derive the ATM interface type, User-Network Interface (UNI) version, maximum virtual path identifier (VPI) and virtual channel identifier (VCI) bits, ATM interface side, and ATM UNI type.
When you hot swap a carrier module (CM) or PAM, the configuration for the initially installed PAM interface configuration is saved. If the same type of PAM is reinstalled, no additional configuration is needed. The initial configuration is reestablished.
The interface configuration is described in the following section "Default ATM Interface Configuration Without Autoconfiguration."
If ILMI is disabled or the connecting end node does not support ILMI, the following defaults are assigned to all 12 25-Mbps interfaces:
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