MX2008 Switch Fabric Boards
MX2008 Enhanced Switch Fabric Board (MX2008 SFB2) Description
The MX2008 Enhanced Switch Fabric Board (MX2008 SFB2; model number: MX2008-SFB2) connects to the signal backplane (see Figure 1). The MX2008 SFB2 and the native MX2000 SFB2 are exactly the same except that the native MX2000 SFB2 has two PF fabric chips per card whereas MX2008 SFB2 has only one PF fabric chip per card, and that MX2008 SFB2 is less than half the size of the native MX2000 SFB2.
MX2008 SFB2 Slots
You can install up to eight SFB2 boards in the MX2008 router.
The MX2008 SFB2 boards install vertically into the front of the chassis
in the slots labeled
7. If any slots are empty, you must install a blank panel.
If one of the MX2008 SFB2s fails, do not remove the failed SFB2 until you have a replacement or blank panel to install.
MX2008 SFB2 Redundancy
Seven out of eight MX2008 SFB2 boards are required for line-rate operation. The system can continue operating with fewer than seven SFB2s, but forwarding performance is impacted.
MX2008 SFB2 Components
Each MX2008 SFB2 consists of the following components:
One PF fabric chip per card
PCIe control of one PF ASIC
I2C bus logic interface, used for component management and monitoring of temperature, and voltage
Switch fabric—Provides the switching functions for the MPCs
Fabric capacity—MX2008 SFB2 supports 2000 Gbps per slot throughput without redundancy
Circuits for chassis management and control
Power circuits for the MX2008 SFB2
LED—Provides status of the MX2008 SFB2
MX2008 SFB LED
One bicolor LED on the MX2008 SFB2 indicates the status of the
SFB. The LED, labeled
OK/FAIL, is located directly
on the SFB. Table 1 describes the functions
of the MX2008 SFB2 LED.
Table 1: MX2008 Switch Fabric Board LED
Slow blinking when being initialized.
Fast blinking when SFB is being identified by software.
Note: The blinking of the LED is used to guide the operator to correct any action needed on the SFB.
SFB is online.
SFB has failed.
SFB is offline.
Each SFB also has a set of bicolor LEDs on the craft interface
that indicate its status. The SFB LED, labeled
7, are located along the bottom center
of the craft interface. For more information about the SFB LEDs on
the craft interface, see MX2008 Component LEDs on the Craft Interface.