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ACX5448, ACX5448-D, and ACX5448-M System Overview

ACX5400 Universal Metro Router Description

The Juniper Networks ACX5400 Universal Metro Routers are top-of-rack routers with deep packet buffer solutions for metro network or aggregation environments. The ACX5400 router portfolio consists of high-performance, fixed-configuration, 1 U routers that add higher port densities, additional scalability, and improved latency to the ACX Series. The routers have a high-throughput Packet Forwarding Engine, which provides full duplex throughput of 800 Gbps.

The ACX5400 line of routers are available in three variants:

  • ACX5448

  • ACX5448-D

  • ACX5448-M

Figure 1 and Figure 2 show the front and rear, respectively, of a typical ACX5448 router.

Figure 1: ACX5448 Router—FrontACX5448 Router—Front
Figure 2: AC-Powered ACX5448 Router—RearAC-Powered ACX5448 Router—Rear

Figure 3 and Figure 4 show the front and rear, respectively, of a typical ACX5448-D router.

Figure 3: ACX5448-D Router—FrontACX5448-D Router—Front
Figure 4: AC-Powered ACX5448-D Router—RearAC-Powered ACX5448-D Router—Rear

Figure 5 and Figure 6 show the front and rear, respectively, of a typical ACX5448-M router.

Figure 5: ACX5448-M Router—FrontACX5448-M Router—Front
Figure 6: AC-Powered ACX5448-M Router—RearAC-Powered ACX5448-M Router—Rear

Benefits of ACX5400 Routers

  • Optimized space—The ACX5400 router has a 1 U form factor and is ideal for Ethernet service aggregation. Its innovative design helps service providers build high-density, high-performance 100-Gigabit Ethernet infrastructures where rack space and cooling are limited.

  • High performance

    • The 52 ports on the ACX5448 router support 10-Gbps and 100-Gbps speeds providing a total throughput of up to 800 Gbps. The router provides full metro Ethernet and IP/MPLS VPN services in a space-optimized platform.

    • The innovative design of the ACX5448-D helps service providers develop converged packet optical solutions.

  • Simplified network architecture— The ACX5400 line of routers simplify access and aggregation architectures by eliminating unnecessary layers and network overlays, resulting in significant operational savings.

  • Advanced security capabilities— The ACX5448-M router supports advanced security capabilities such as Media Access Control Security (MACsec) on the 10-Gigabit or 1-Gigabit Ethernet ports to protect against potential network vulnerabilities.

ACX5448, ACX5448-D, and ACX5448-M System Overview

The ACX5400 routers have a high-throughput Packet Forwarding Engine, and the performance of the control plane running on ACX5400 routers is enhanced by the 1.9-Ghz six-core Intel CPU with 32-GB of memory and two 100-GB enterprise-grade solid-state drives (SSDs) for storage.

We ship the ACX5400 routers with redundant fans and redundant power supply modules (PSMs). You can order the routers with front-to-back airflow (airflow out or AFO) or back-to-front airflow (airflow in or AFI), and with AC or DC PSMs.

Figure 7 shows the important components on the front of the ACX5448 router.

Figure 7: Front View of the ACX5448 RouterFront View of the ACX5448 Router
  1

SFP and SFP+ ports

  4

Console (CON) port

  2

QSFP28 ports

  5

PPS and 10M GPS output ports

  3

Management (MGMT) port

  6

USB port

Figure 8 and Figure 9 shows the important components on the rear of the ACX5448 routers.

Figure 8: Rear View of the AC-Powered ACX5448 RouterRear View of the AC-Powered ACX5448 Router
  1

Power supply modules (AC)

  2

Fan modules

Figure 9: Rear View of the DC-Powered ACX5448 RouterRear View of the DC-Powered ACX5448 Router
  1

Power supply modules (DC)

  2

Fan modules

The fan modules and PSMs on the ACX5448 routers are installed in slots on the rear of the chassis. The chassis has six slots for the fan modules and two slots for the PSMs.

The six fan modules are numbered 0 through 5 from left to right. Similarly, the two PSMs are numbered 0 and 1.

Figure 10 shows the important components on the front of the ACX5448-D router.

Figure 10: Front View of the ACX5448-D RouterFront View of the ACX5448-D Router
  1

SFP and SFP+ ports

  5

Console (CON) port

  2

QSFP28 ports

  6

PPS and 10M GPS output ports

  3

CFP2 ports

  7

USB port

  4

Management (MGMT) port

 

Figure 11 and Figure 12 show the important components on the rear of the ACX5448-D routers.

Figure 11: Rear View of the AC-Powered ACX5448-D RouterRear View of the AC-Powered ACX5448-D Router
  1

Power supply modules (AC)

  2

Fan modules

Figure 12: Rear View of the DC-Powered ACX5448-D RouterRear View of the DC-Powered ACX5448-D Router
  1

Power supply modules (DC)

  2

Fan modules

The fan modules and PSMs on the ACX5448-D routers are installed in slots on the rear of the chassis. The chassis has six slots for the fan modules and two slots for the PSMs.

The six fan modules are numbered 0 through 5 from left to right. Similarly, the two PSMs are numbered 0 and 1.

Figure 13 shows the important components on the front of the ACX5448-M router.

Figure 13: Front View of the ACX5448-M RouterFront View of the ACX5448-M Router
  1

SFP and SFP+ ports

  4

Console (CON) port

  2

QSFP28 ports

  5

PPS and 10M GPS output ports

  3

Management (MGMT) port

  6

USB port

Figure 14 and Figure 15 show the important components on the rear of the ACX5448-M routers.

Figure 14: Rear View of the AC-Powered ACX5448-M RouterRear View of the AC-Powered ACX5448-M Router
  1

Power supply modules (AC)

  2

Fan modules

Figure 15: Rear View of the DC-Powered ACX5448-M RouterRear View of the DC-Powered ACX5448-M Router
  1

Power supply modules (DC)

  2

Fan modules

The fan modules and PSMs on the ACX5448-M routers are installed in slots on the rear of the chassis. The chassis has six slots for the fan modules and two slots for the PSMs.

The six fan modules are numbered 0 through 5 from left to right. Similarly, the two PSMs are numbered 0 and 1.

Figure 16 shows the important components on the front of the ACX5448-M-LT router.

Figure 16: Front View of the ACX5448-M-LT RouterFront View of the ACX5448-M-LT Router
  1

SFP and SFP+ ports

  4

Console (CON) port

  2

QSFP28 ports

  5

PPS and 10M GPS output ports

  3

Management (MGMT) port

  6

USB port

Figure 17 and Figure 18 show the important components on the rear of the ACX5448-M-LT routers.

Figure 17: Rear View of the AC-Powered ACX5448-M-LT RouterRear View of the AC-Powered ACX5448-M-LT Router
  1

Power supply modules (AC)

  2

Fan modules

Figure 18: Rear View of the DC-Powered ACX5448-M-LT RouterRear View of the DC-Powered ACX5448-M-LT Router
  1

Power supply modules (DC)

  2

Fan modules

The fan modules and PSMs on the ACX5448-M-LT routers are installed in slots on the rear of the chassis. The chassis has six slots for the fan modules and two slots for the PSMs.

The six fan modules are numbered 0 through 5 from left to right. Similarly, the two PSMs are numbered 0 and 1.

The electrostatic discharge (ESD) point on the router is located on the rear of the chassis. Figure 19 shows the ESD point on the ACX5448 router and Figure 20 shows the ESD point on the ACX5448-D and ACX5448-M routers.

CAUTION:

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

Figure 19: ESD Point on the ACX5448 RouterESD Point on the ACX5448 Router
  1

ESD point

 
Figure 20: ESD Point on the ACX5448-D and ACX5448-M RouterESD Point on the ACX5448-D and ACX5448-M Router
  1

ESD point

 

ACX5400 Router Models

The ACX5400 line of routers are available with either AC or DC power supply modules (PSMs) and with either airflow-out (AFO) or airflow-in (AFI) cooling. AFO is also known as front-to-back or port-to-FRU cooling; similarly AFI is known as back-to-front or FRU-to-port cooling.

Table 1 lists the model numbers for ACX5448 routers.

Table 1: ACX5448 Router Model Numbers and Description

Model Number

Power Supply

Airflow

ACX5448-AC-AFI

AC

Airflow in (back-to-front)

ACX5448-DC-AFI

DC

Airflow in (back-to-front)

ACX5448-AC-AFO

AC

Airflow out (front-to-back)

ACX5448-DC-AFO

DC

Airflow out (front-to-back)

Table 2 lists the model numbers for ACX5448-D routers.

Table 2: ACX5448-D Router Model Numbers and Description

Model Number

Power Supply

Airflow

ACX5448-D-AC-AFI

AC

Airflow in (back-to-front)

ACX5448-D-DC-AFI

DC

Airflow in (back-to-front)

ACX5448-D-AC-AFO

AC

Airflow out (front-to-back)

ACX5448-D-DC-AFO

DC

Airflow out (front-to-back)

Table 3 lists the model numbers for ACX5448-M routers.

Table 3: ACX5448-M Router Model Numbers and Description

Model Number

Power Supply

Airflow

ACX5448-M-AC-AFI

AC

Airflow in (back-to-front)

ACX5448-M-DC-AFI

DC

Airflow in (back-to-front)

ACX5448-M-AC-AFO

AC

Airflow out (front-to-back)

ACX5448-M-DC-AFO

DC

Airflow out (front-to-back)

ACX5448-M-AC-AFO-L

AC

Airflow out (front-to-back)

ACX5448-M-DC-AFO-L

DC

Airflow out (front-to-back)

ACX5448-M-AC-AFI-L

AC

Airflow in (back-to-front)

ACX5448-M-DC-AFI-L

DC

Airflow in (back-to-front)

The ACX5448-M-LT router supports only Junos Limited image. The Junos Limited image does not have data-plane encryption and is intended only for countries in the Eurasian Customs Union because these countries have import restrictions on software containing data-plane encryption. Unlike the Junos Worldwide image, the Junos Limited image supports control plane encryption through Secure Shell (SSH) and Secure Sockets Layer (SSL), thus allowing secure management of the system.

CAUTION:

Do not mix different types (AC and DC) of power supply modules and different airflow modules (AFI and AFO) in the same chassis.

Field-Replaceable Units in ACX5400 Routers

Field-replaceable units (FRUs) are components that you can replace at your site. The ACX5400 FRUs are hot-insertable and hot-removable: you can remove and replace them without powering off the router or disrupting the routing function.

The following are the ACX5400 FRUs:

  • Power supply modules (PSMs)

  • Fan modules

  • Optical transceivers

CAUTION:

Replace a failed PSM with a new PSM within one minute of removal to prevent chassis overheating. The router continues to operate with only one PSM running. Replace a failed fan module with a new fan module within one minute of removal to prevent chassis overheating. Do not operate the router with missing FRUs for longer than one minute.

Note:

If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/csc/management/updateinstallbase.jsp. Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.

Note:

Before removing the optical transceivers, we recommend that you disable the interface using the set interfaces interface-name disable command.

Hardware Redundancy of ACX5400 Router Components and Functionality

The following hardware components provide redundancy on ACX5400 routers:

  • Power supply modules (PSMs)—The ACX5400 routers have two PSMs. Each PSM provides power to all components in the router. If two PSMs are installed, they provide full power redundancy to the device. If one PSM fails or if you remove one PSM, then the second PSM balances the electrical load without interruption.

    To provide power redundancy to the system, both PSMs must be installed. Connect the first power source feed to one PSM and the other power source to the second PSM.

    CAUTION:

    Do not connect both the power source feeds to the same power supply input terminal.

  • Cooling system—The ACX5400 routers have six fan modules. If a fan module fails and is unable to keep the router within the desired temperature thresholds, chassis alarms occur and the router can eventually shut down. The router can work with one failed fan module for a long duration, but for the router to work efficiently you must replace the failed fan module immediately.

ACX5400 Routers Hardware and CLI Terminology Mapping

Table 4 describes the hardware terms used in ACX5400 router documentation and the corresponding terms used in the Junos OS command line interface (CLI).

Table 4: CLI Equivalents of Terms Used in Documentation for ACX5400 Routers

Hardware Item (as Displayed in the CLI)

Description (as Displayed in the CLI)

Value (as Displayed in the CLI)

Item in Documentation

Additional Information

Chassis

ACX5448

ACX5448-D

ACX5448-M

Router chassis

Chassis Physical Specifications for ACX5400 Routers

Routing Engine

Routing Engine

Built-in Routing Engine.

FPC n

Abbreviated name of the Flexible PIC Concentrator (FPC; an FPC is equivalent to a line card)

Value of n is always 0.

The router does not have actual FPCs. In this case, FPC refers to the router itself.

Built-in FPC.

Interface Naming Conventions Used in the Junos OS Operational Commands

PIC n

Abbreviated name of the Physical Interface Card (PIC)

Value of n is a value in the range of 0-1.

The router does not have actual PIC devices; see entries for PIC n for the equivalent item on the router.

Built-in network ports on the front panel of the router are mapped to logical PICs.

Interface Naming Conventions Used in the Junos OS Operational Commands

xcvr n

Abbreviated name of the transceiver

n is a value equivalent to the number of the port in which the transceiver is installed.

Optical transceivers

Port and Interface Specifications

PEM n

Power supply

n is a value in the range of 0—1.

AC power supply module

DC power supply module

AC Power Supply for ACX5400 Routers

DC Power Supply for ACX5400 Routers

Fan tray

Fan

n is a value in the range of 0-5.

Fan

Cooling System and Airflow in ACX5448, ACX5448-D, and ACX5448-M Routers

ACX5400 System Software Overview

The ACX5400 routers run the Junos operating system (OS), which provides Layer 2 and Layer 3 switching, routing, and security services. Junos OS is installed on an ACX5400 router’s 100-gigabyte (GB) internal solid-state flash drive. The same Junos OS code base that runs on an ACX5400 router also runs on all Juniper Networks QFX and EX Series switches, SRX Series devices, and on MX Series, ACX Series, and PTX Series routers.

For more information about which features are supported on an ACX5400 router, see Feature Explorer.

You manage the router using the Junos OS command-line interface (CLI), accessible through the console and out-of-band management ports on the router.