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Chassis Management Module (CMM)

 

The Chassis Management Module (CMM) provides management and control of the chassis, and is responsible for the following functions:

  • Monitors, controls, and assures proper operation of the modules and other chassis components.

  • Watches over the basic health of the system, reports anomalies, and takes corrective action when needed.

  • Retrieves inventory information and sensor readings, as well as, receive event reports and failure notifications from the modules and field-replaceable units (FRUs).

  • Performs basic recovery operations, such as, power cycle or reset of managed entities.

  • Provides low-level hardware management services to manage the power, cooling, and interconnect resources of a chassis.

  • Provides non-volatile storage of configuration data and software loads.

  • Enables operator control of all modules in the system.

  • Supports an industry-standard CLI, NETCONF, and SNMP.

Figure 1: CMM Module
CMM Module

Table 1: CMM Ports

Port

Physical Interface

Description

Craft Serial (RS-232)

RJ-45

Provides local craft serial access for diagnostic and commissioning functions.

Expansion (EXP-1 to EXP-3)

RJ-45

Provides management plane connectivity in a multichassis configuration.

Management Ethernet (eth1)

RJ-45

Provides management network connectivity.

Craft Ethernet (eth0)

RJ-45

Provides local craft Ethernet access for diagnostic and commissioning functions.

USB-1

USB 2.0 Standard Type-A Receptacle

Provides the ability for the CMM to boot from a system repair drive.

Figure 2: CMM Slot Locations on BTI7814
CMM Slot Locations on BTI7814
Figure 3: CMM Slot Locations on BTI7802
CMM Slot Locations on BTI7802
Figure 4: CMM Slot Location on BTI7801 (Rear View)
CMM Slot Location on BTI7801 (Rear View)

CMM1 Specifications

Table 2: Chassis Management Module 1 (BT8A78CMM1) Specifications

Item

Specification

Physical Dimensions

Width

8.38 in

212.9 mm

Height

1.12 in

314.4 mm

Depth

12.38 in

30.5 mm

Weight

3.0 lb

1.36 kg

Chassis

BTI7814, BTI7802, BTI7801

Power Consumption (40°C ambient)

Note: Before using for planning or implementation purposes, contact Juniper Networks Support to confirm the power consumption values.

Typical: 70 W

Maximum: 77 W

CPU

1.86 GHz Dual-Core

Memory

4 GB DRAM

Non-volatile Storage

16 GB Flash

Supported Management Protocols

CLI, SNMP, NETCONF

Interfaces

Connector

Standard

Speed

Craft Serial

RJ45

RS232

115200 bps 8N1

(8 data bits, No parity, 1 stop bit)

EXP-1 to EXP-3

RJ45

IEEE 802.3 Ethernet

10/100/1000 Mbps

Management Ethernet

RJ45

IEEE 802.3 Ethernet

10/100/1000 Mbps

Craft Ethernet

RJ45

IEEE 802.3 Ethernet

10/100/1000 Mbps

USB-1

USB 2.0 Standard-A Receptacle

USB 2.0

n/a

LEDs

Name

Color

Description

Identify

Amber

Not used.

Active

Green

The CMM is operationally up.

Fail

Red

The CMM is operationally down or the CMM is not recognized.

Hot Swap

Blue

The CMM does not match the provisioned CMM.

Port LEDs

Link (right)

Green

The link is up.

 

Activity (left)

Green

The LED flickers to indicate activity on the link.

CMM1 Latches

The CMM latches have a spring-loaded locking mechanism. The latches must be fully closed and locked for proper module operation.

Installing a CMM

Use this procedure to install a CMM.

It is recommended that you install two CMMs for redundancy.

Tools Required

  • Number 2 Phillips screwdriver

Note

Be familiar with the site, safety, and installation guidelines described in Module Installation and Removal Guidelines.

  1. Remove the filler panel from the slot into which you are installing the module and store it in a safe place for future use.
  2. Remove the module from its antistatic bag, holding it by its edges and faceplate to prevent damage to the module circuitry.

    Visually inspect the module, including the pins and connectors that attach to the backplane, for signs of damage before installation.

  3. Install the module.
    1. Ensure that all latches are in the fully open position. See CMM1 Latches.

    2. Facing the front of the chassis, position the module horizontally so that the text on the faceplate is in the correct orientation.

    3. Align the module with the slot guides.

    4. Insert the module edges in the slot guides and carefully slide the module until it contacts the backplane.

    5. Press firmly on a part of the faceplate away from the latches. The latches close by themselves as the module is seated. Take care not to pinch your fingers as the latches close.

    6. Lock the latches by closing the latches until the locking mechanism springs shut.

      When the latches are in the locked position, the latches cannot be opened without squeezing the spring-loaded locking mechanism to disengage the lock from the module faceplate.

  4. Carefully tighten the faceplate thumbscrews.

You have successfully completed this procedure.

Removing a CMM

Use this procedure to remove a CMM from a chassis.

Tools Required

  • Number 2 Phillips screwdriver

  • Antistatic bag

Note

Be familiar with the site, safety, and installation guidelines described in Module Installation and Removal Guidelines.

  1. Disconnect the cables from the module.Note

    Ensure that cables are protected with protective caps while disconnected.

  2. Loosen the two faceplate thumbscrews. Use a screwdriver if necessary.
  3. Squeeze the spring-loaded locking mechanism to disengage the latch from the module faceplate, and pull the latches to the open and unlocked position to unseat the module. See CMM1 Latches.
  4. Slide the module from the slot and place it in an antistatic bag.
  5. If the slot is to remain empty, install a CMM filler plate.

You have successfully completed this procedure.