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MX2020 Chassis Description

 

The router chassis is a rigid sheet metal structure that houses all the other router components, (see Figure 1, Figure 2, and Figure 3). The chassis installs in a standard 19-in. four-post rack or enclosed cabinet.

Note

There must be a minimum of 45-U of usable rack space when installing the MX2020 router into a 45-U rack.

Note

If you are installing the MX2020 router into a network cabinet, make sure that no hardware, device, rack, or cabinet component obstructs the 45-U rack space from access during installation.

There are two types of chassis configurations available for the MX2020:

  • The chassis with standard cable managers and EMI covers measures 78.75 in. (200 cm) high, 19 in. (48.26 cm) wide, and 35.72 in. (90.7 cm) deep.

  • The chassis with extended cable managers and extended EMI covers measures 78.75 in. (200 cm) high, 19 in. (48.26 cm) wide, and 37.46 in. (95.1 cm) deep.

Caution

Before removing or installing components, attach an ESD strap to an ESD point, and place the other end of the strap around your bare wrist. Failure to use an ESD strap could result in damage to the hardware components.

Warning

The router must be connected to earth ground during normal operation.

Note

One router can be installed in a 45-U four-post rack if the rack can support the combined weight, which can be greater than 1,500 lb (680.39 kg).

Mounting hardware includes built-in front-mounting flanges on the front of the chassis, and one large shelf attached to a four-post rack or cabinet to support the chassis.

Figure 1: Front View of a Fully Configured MX2020 Router Chassis
Front View of a Fully Configured
MX2020 Router Chassis

Remove field replacement units (FRUs) from the front of the MX2020 router before you install the router. See Table 1 for information on MX2020 router components.

Table 1: Front Components in a Fully Configured MX2020 Router

Component No.

Component Description

Slots

Number of FRUs

1

Upper cable manager– (standard or extended)

1

2

MPCs with ADCs and MICs (top)

10 through 19 (top)

10

3

Switch Fabric Boards (SFBs)

0 through 7

8

4

Control Board and Routing Engine (CB-RE)

0 and 1

2

5

Middle card cage air filter

1

6

MPCs with ADCs and MICs (bottom)

0 through 9

10

7

Lower cable manager– (standard or extended)

1

Note

A combination middle cable manager and air filter is installed over the middle card cage.

Figure 2: Rear View of a Fully Configured AC-Powered MX2020 Router Chassis
Rear View of a Fully Configured
AC-Powered MX2020 Router Chassis

Remove field replacement units (FRUs) from the rear of the MX2020 router before you install the router. See Table 2 for information on MX2020 router components.

Table 2: Rear Components in a Fully Configured AC-Powered MX2020 Router

Component No.

Component Description

Slots

Number of FRUs

1

Upper fan trays (two)

Fan tray 2 and fan tray 3 (behind cage door)

2

2

AC PDM—Three-phase delta or wye

PDM3/Input1

1

3

AC PSM

9 through 17

9

4

PSM air filter

1

5

AC PDM—Three-phase delta or wye

PDM2/Input0

1

6

AC PDM—Three-phase delta or wye

PDM1/Input1

1

7

AC PSM

0 through 8

9

8

PSM air filter

1

9

AC PDM)—Three-phase delta or wye

PDM0/Input0

1

10

Fan tray air filter

1

11

Lower fan trays (two)

Fan tray 0 and fan tray 1 (behind access door)

2

Figure 3: Rear View of a Fully Configured DC-Powered MX2020 Router Chassis
Rear View of a Fully Configured
DC-Powered MX2020 Router Chassis

Remove field replacement units (FRUs) from the rear of the MX2020 router before you install the router. See Table 3 for information on MX2020 router components.

Table 3: Rear Components in a Fully Configured DC-Powered MX2020 Router

Component No.

Component Description

Slots

Number of FRUs

1

Upper fan trays (two)

Fan tray 2 and fan tray 3 (behind cage door)

2

2

DC PDM

PDM3/Input1

1

3

DC PSM

9 through 17

9

4

PSM air filter

1

5

DC PDM

PDM2/Input0

1

6

DC PDM

PDM1/Input1

1

7

DC PSM

0 through 8

9

8

PSM air filter

1

9

DC PDM

PDM0/Input0

1

10

DC cable manager–(standard or extended)

4

11

Fan tray air filter

1

12

Lower fan tray (two)

Fan tray 0 and fan tray 1 (behind access door)

2

The MX2020 router has four electrostatic discharge (ESD) points. Two are located on either side of the upper MPCs on the front of the chassis. A second pair is located on either side of the lower MPCs on the front of the chassis (see Figure 4).

Figure 4: MX2020 Router ESD Points
MX2020 Router ESD Points