SCBE-MX Description

The SCBE-MX is the second generation switch control board and is designed specifically for use with MPC3E line cards to provide full line-rate performance and redundancy without a loss of bandwidth.

The SCBE-MX installs vertically in the MX960 chassis and horizontally in the MX480 and MX240 chassis. The routing engine installs directly into a slot on the SCBE-MX (see Figure 1).

Figure 1: SCBE-MX Technical drawing of a server blade highlighting control panel buttons, network ports, and power reset controls.

Software Release	11.4R1
CLI Identification	`Enhanced MX SCB`
SCBE-MX Maximum Power Requirements	160 W at 55° C 130 W at 40° C 120 W at 25° C
SCBE-MX Cooling Requirements
Fabric Bandwidth Per Slot	Up to 240 Gbps (non-redundant fabric configuration); 160 Gbps (redundant fabric configuration). MX240: Up to 930 Gbps MX480: Up to 2.79 Tbps MX960: Up to 5.25 Tbps
Switch Fabric Capacity	5.12 Tbps

SCBE-MX Features

Feature	Description
Increased Bandwidth	Provides 160 Gbps/slot bandwidth with redundant fabric support
Improved Fabric Performance	Provides improved fabric performance for high-capacity line cards using the next-generation fabric (XF) chip
Centralized Stratum 3 Clock Module	Provides a central clocking module and a centralized clocking architecture that supports clock cleanup and distribution. The Stratum 3 clock module performs clock monitoring, filtering, and holdover at a centralized chassis location.
Redundancy	Provides full performance with fabric redundancy for high-capacity line cards

Maximum Number of SCBE-MX’s Per Chassis

Table 1 lists the maximum number of SCBE-MXs you can install in the MX chassis, the corresponding slot labels, and the backup slot used for redundancy. If any slots are empty, you must install a blank panel.

Table 1: SCBE-MX Specifications
Chassis	Maximum SCBE-MXs	Slot Labels	Backup Slot
MX960	3	0, 1, and 2	2
MX480	2	`0` and `1`	`1`
MX240	2	`0` and `1`	`1`

SCBE-MX Interoperability with Routing Engines

Routing Engines	Maximum Power Requirement
RE-S-1800 (all variants) RE-S-1300 (EOLed) RE-S-2000 (EOLed) RE-S-2000-4096 (EOL’d)	90 W

Routing Engines

Maximum Power Requirement

RE-S-1800 (all variants)

RE-S-1300 (EOLed)

RE-S-2000 (EOLed)

RE-S-2000-4096 (EOL’d)

90 W

Note: The SCBE-MX was designed to be used specifically with MPC3E line cards to provide full line-rate performance and redundancy without a loss of bandwidth.

SCBE-MX LEDs

The FABRIC ACTIVE, FABRIC ONLY, and OK/FAIL LEDs indicate the status of the SCBE-MX. The BITS, GPS, and UTI LEDs (next to the EXT CLK port) indicate the status of the respective clocking interface. Table 2 describes the behavior of the SCBE-MX LEDs.

Table 2: SCBE-MX LEDs
Label	Color	State	Description
FABRIC ACTIVE	Green	On steadily	Fabric is in active mode.
FABRIC ONLY	Green	On steadily	SCBE-MX operates in fabric-only mode.
FABRIC ONLY	–	Off	SCBE-MX operates in fabric/control board mode.
OK/FAIL	Green	On steadily	SCBE-MX is online.
	Red	On steadily	SCBE-MX has failed.
	–	Off	SCBE-MX is offline.
	Red	On steadily	GPS clocking interface has failed.
	–	Off	GPS clocking interface is offline.
Note: The LEDs BITS, GPS, and UTI are not currently supported.
BITS	Green	On steadily	Building-integrated timing supply (BITS) clocking interface is active.
	Red	On steadily	BITS clocking interface has failed.
	–	Off	BITS clocking interface is offline.
GPS	Green	On steadily	Global positioning system (GPS) clocking interface is active.
	Red	On steadily	GPS clocking interface has failed.
	–	Off	GPS clocking interface is offline.
UTI	Green	On steadily	Universal Timing Interface (UTI) clocking interface is active.
	Red	On steadily	UTI clocking interface has failed.
	–	Off	UTI clocking interface is offline.

Upgrading to the SCBE-MX

Here’s the procedures for upgrading your MX960, MX480, or MX240 router to use the SCBE-MX: