Juniper-networks MX480 Instrukcja Użytkownika Strona 54

  • Pobierz
  • Dodaj do moich podręczników
  • Drukuj
  • Strona
    / 366
  • Spis treści
  • BOOKMARKI
  • Oceniono. / 5. Na podstawie oceny klientów
Przeglądanie stron 53
MX SCBE Slots
You can install one or two MX SCBEs. The MX SCBEs install horizontally into the front
of the chassis in the slots labeled 0 and 1. If any slots are empty, you must install a blank
panel.
MX SCBE Redundancy
If two MX SCBEs are installed, one MX SCBE functions as the master MX SCBE and the
other as its backup. If the master fails or is removed, the backup restarts and becomes
the master.
MX SCBE Components
Each MX SCBE consists of the following components:
I2C bus logic, used for low-level communication with each component
Component redundancy circuitry
Control Board/Routing Engine mastership mechanism
Gigabit Ethernet switch that is connected to the embedded CPU complex on all
components
External clock interface—Allows BITS or GPS clock source input to the centralized
timing circuit, or allows centralized timing to be output to BITS or GPS
Switch fabric—Provides the switching functions for the DPCs, FPCs, and MPCs
Control field-programmable gate array (FPGA)—Provides the Peripheral Component
Interconnect (PCI) interface to the Routing Engine
1000Base-T Ethernet controller—Provides a 1-Gbps Ethernet link between the Routing
Engines
Circuits for chassis management and control
Power circuits for the Routing Engine and SCBE
LEDs—Provide status of the SCBE and clocking interface
Related
Documentation
MX480 Switch Control Board (SCB) Description on page 26
MX480 Enhanced Switch Control Board LEDs on page 30
Upgrading an MX480 SCB on page 177
MX480 Enhanced Switch Control Board LEDs
The FABRIC ACTIVE, FABRIC ONLY, and OK/FAIL LEDs indicate the status of the SCBE.
The BITS, GPS, and UTI LEDs, located next to the EXT CLK port, indicate the status of the
respective clocking interface. Table 7 on page 31 describes the functions of the Enhanced
MX SCB (MX SCBE) LEDs.
Copyright © 2013, Juniper Networks, Inc.30
MX480 3D Universal Edge Router Hardware Guide
Przeglądanie stron 53
1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 365 366

Komentarze do niniejszej Instrukcji

Brak uwag