Table Of Contents

Shelf Controller Gigabit Ethernet Card

SCGE Functional Overview

2-Port SCGE Card Overview

Front-Panel Interface

Asynchronous Serial Ports

LED Displays

Gigabit Ethernet Interface

PCMCIA PC Cards

22-Port SCGE Card Overview

Front-Panel Interface

Asynchronous Serial Ports

LED Displays

Gigabit Ethernet Interface

PCMCIA PC Cards

Shelf Controller Gigabit Ethernet Card

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This chapter describes the shelf controller Gigabit Ethernet card (SCGE) located on the front (SFC) side of the fabric card chassis (FCC). It includes the following sections:

•SCGE Functional Overview

•2-Port SCGE Card Overview

•22-Port SCGE Card Overview

The SCGE card described in this chapter uses a Class 1 laser. The following warnings apply to the SCGE card.

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Warning Class 1 Laser Product. Statement 113

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Warning Because invisible radiation may be emitted from the aperture of the port when no fiber cable is connected, avoid exposure to radiation and do not stare into open apertures. Statement 125

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Note Two versions of the SCGE card are available. The original 2-port version does not include integrated switching functionality. Fabric card chassis that are equipped with 2-port SCGE cards, require external Cisco Catalyst switches to perform control network tasks. The current 22-port version includes integrated switching functionality, replaces the 2-port SCGE cards, and eliminates the need for external
Cisco Catalyst switches.

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Throughout this chapter, both versions of the SCGE cards are referred to as SCGE cards, unless otherwise noted.

SCGE Functional Overview

The shelf controller Gigabit Ethernet (SCGE) card is the local system management node for an FCC. It is available in 2-port and 22-port Gigabit Ethernet (GE) interface configurations. The 2-port SCGE card links an FCC to the external Catalyst switch. The 22-port SCGE card features an integrated switch that eliminates the need for the 2-port SCGE card and the external Cisco Catalyst switch. The SCGE card also controls power up, initialization, SFCs, the optical interface module LED (OIM-LED) card, alarms, power supplies, and fans in an FCC. It also includes the 48-V soft-start circuitry for the fan tray.

The SCGE card provides system initialization, debugging, and low-level hardware control for all SFCs in an FCC and other system cards. The card includes front-panel ports and an alphanumeric LED display. It also includes two PC Card (PCMCIA) slots for local storage needs. One PC card is removable and the other one is fixed. Communication within the chassis takes place over a redundant set of backplane Fast Ethernet (FE) links controlled by the SCGE card.

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Note By default, two SCGE cards are installed in an FCC to provide redundant service. Throughout the remainder of this chapter, these cards are identified as active and standby cards.

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The SCGE card globally:

•Provides the power-on boot of the SCGE CPU and the system management ports

•Determines control of the chassis (active or standby) with the other SCGE card in the chassis

•Provides 2 or 22 GE ports for the external system management communications across the chassis

In active mode, the SCGE:

•Downloads Ethernet MAC addresses from the backplane erasable programmable read-only memory (EPROM) and assigns them to all cards in the chassis

•Serves as the FE switch for the intrachassis system management network

•On command from the system management network, starts up and monitors power supplies, chassis fans, and thermal sensors

•On command from the system management network, downloads software images to the SFCs in the chassis, starts up card power supplies, and starts and resets card processors

•Sends alarms and resets, or shuts down portions of the chassis hardware in abnormal or dangerous conditions within the chassis

•Keeps a log of SCGE card and chassis activity on nonvolatile memory and places core dumps onto an internal hard disk

•In case of a timeout, initiates self-reset or rearbitration for chassis ownership

•Controls the fan speed

In standby mode, the SCGE card:

•Periodically tests the FE links to all chassis hardware

•Keeps local state information synchronized

•Rearbitrates for chassis ownership if the active card releases ownership

The FCC holds up to 24 SFCs, 2 SCGE cards, 2 fan trays, 24 optical interface module (OIM) cards, 2 OIM-LED cards, 2 alarm modules, and 2 AC or DC power shelves. Except for the SCGE cards, OIM cards, and fan trays, each of these components has its own service processor (SP) with two backplane FE links to the SCGE cards.

In addition, the two SCGE cards have one FE link between them, and each SCGE card has one backplane FE link routed back to itself. The 48-V soft-start circuit of the fan tray is part of the SCGE card. The SCGE card controls the fan speed and monitors the status of the fan trays through four I2C buses, with two buses going to each fan tray.

2-Port SCGE Card Overview

This section describes the 2-port SCGE card (CRS-FCC-SC-GE) and its components. Figure 5-1 shows the front panel of the 2-port SCGE card in a horizontal view.

Figure 5-1 2-Port SCGE Card Front Panel (Horizontal View)

1	RJ-45 auxiliary (AUX) port	5	Alphanumeric LEDs
2	RJ-45 CONSOLE port	6	Gigabit Ethernet interface
3	STATUS LED	7	PCMCIA card slots
4	PRIMARY LED

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Note SCGE cards are located in the first slot to the right of the upper and lower card cages. They are identified as SCGE0 and SCGE1.

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Front-Panel Interface

The front panel of the 2-port SCGE card includes various components that interface with the user. This section describes the front-panel interfaces.

Asynchronous Serial Ports

The 2-port SCGE card has two asynchronous serial ports, the CONSOLE and auxiliary (AUX) ports. These ports allow you to connect external serial devices so you can monitor and manage the system. Both ports use RJ-45 receptacles.

•CONSOLE port—Provides a data terminal equipment (DTE) interface for connecting a console terminal.

•Auxiliary (AUX) port—Provides a data terminal equipment (DTE) interface and supports flow control. The port is often used to connect a modem, a channel service unit (CSU), or other optional equipment for Telnet management.

LED Displays

The 2-port SCGE card includes the following LED displays:

•Alphanumeric LEDs—Displays Cisco IOS XR software status and error messages.

•PRIMARY LED—When lit, this LED indicates whether or not the 2-port SCGE card is operating as the active SCGE card in the chassis.

•STATUS LED—Indicates the status of the 2-port SCGE cards relative to power and thermal conditions. A green LED indicates that the card is operating normally. A flashing yellow LED indicates that one of the following abnormal conditions has occurred:

–One of the power supplies is operating at 10 percent below nominal specifications.

–The temperature at one of the three thermal sensors exceeds 90 degrees Celsius.

The 2-port SCGE card includes a safety shutdown circuit that powers down all voltages except the 5-V housekeeping voltage. When an abnormal condition is sensed, the STATUS LED on the front panel flashes yellow. Ten seconds later, the shutdown is triggered and power to the card is shut down until the card is reset. After the card powers down, it must be power-cycled by removing it from the chassis or powering down the entire chassis. This mechanism requires that the 5-V housekeeping voltage be functioning correctly.

Gigabit Ethernet Interface

The 2-port SCGE card includes a two-port GE interface (1000BASE-LX) for connection to the control network that links all LCCs and FCCs. See the Cisco CRS-1 Carrier Routing System Multishelf System Interconnection and Cabling Guide for complete multishelf system cabling information.

PCMCIA PC Cards

The 2-port SCGE card includes one removable and one fixed PC Card (PCMCIA Type I / II). The removable, external PC Card facilitates image files of up to 1 gigabyte. The nonremovable, internal PC Card also facilitates image files of up to 1 gigabyte. However, this card is for Cisco use only and is not accessible to users.

22-Port SCGE Card Overview

This section describes the 22-port SCGE card (SC-GE-22) and its components. Figure 5-2 shows the front panel of the 22-port SCGE card in a horizontal view.

Figure 5-2 22-Port SCGE Card Front Panel (Horizontal View)

1	RJ-45 auxiliary (AUX) port	5	Alphanumeric LEDs
2	RJ-45 CONSOLE port	6	Gigabit Ethernet interface
3	STATUS LED	7	PCMCIA card slots
4	PRIMARY LED

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Note SCGE cards are located in the first slot to the right of the upper and lower card cages. They are identified as SCGE0 and SCGE1.

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Front-Panel Interface

The front panel of the 22-port SCGE card includes various components that interface with the user. This section describes the front-panel interfaces.

Asynchronous Serial Ports

The 22-port SCGE card has two asynchronous serial ports, the CONSOLE and auxiliary (AUX) ports. These ports allow you to connect external serial devices so you can monitor and manage the system. Both ports use RJ-45 receptacles.

•CONSOLE port—Provides a data terminal equipment (DTE) interface for connecting a console terminal.

•Auxiliary (AUX) port—Provides a data terminal equipment (DTE) interface and supports flow control. The port is often used to connect a modem, a channel service unit (CSU), or other optional equipment for Telnet management.

LED Displays

The 22-port SCGE card includes the following LED displays:

•Alphanumeric LEDs—Displays Cisco IOS XR software status and error messages.

•PRIMARY LED—When lit, this LED indicates whether or not the 22-port SCGE card is operating as the active SCGE card in the chassis.

•STATUS LED—Indicates the status of the 22-port SCGE cards relative to power and thermal conditions. A green LED indicates that the card is operating normally. A flashing yellow LED indicates that one of the following abnormal conditions has occurred:

–One of the power supplies is operating at 10 percent below nominal specifications.

–The temperature at one of the three thermal sensors exceeds 90 degrees Celsius.

The 22-port SCGE card includes a safety shutdown circuit that powers down all voltages except the 5-V housekeeping voltage. When an abnormal condition is sensed, the STATUS LED on the front panel flashes yellow. Ten seconds later, the shutdown is triggered and power to the card is shut down until the card is reset. After the card powers down, it must be power-cycled by removing it from the chassis or powering down the entire chassis. This mechanism requires that the 5-V housekeeping voltage be functioning correctly.

Gigabit Ethernet Interface

The 22-port SCGE card includes a 22-port GE interface (1000BASE-LX) for connection to the control network that links all LCCs and FCCs. See the Cisco CRS-1 Carrier Routing System Multishelf System Interconnection and Cabling Guide for complete multishelf system cabling information.

PCMCIA PC Cards

The 22-port SCGE card includes one removable and one fixed PC Card (PCMCIA Type I / II). The removable, external PC Card facilitates image files of up to 1 gigabyte. The nonremovable, internal PC Card also facilitates image files of up to 1 gigabyte. However, this card is for Cisco use only and is not accessible to users.