Overview


Note

The Cisco ASR-920-12SZ-IM and Cisco ASR-920U-12SZ-IM are collectively referred to as the Cisco ASR-920-12SZ-IM Router in this document. Any differences between the routers are specifically called out.

The Cisco ASR 920 Series Aggregation Services Router is a family of fixed configuration routers that provides common network architecture to the Service Providers for macro and small cell networks.

This router acts as an access device for mobile backhaul services—macro Cell Site Router (CSR) and Small Cell Router (SCR). As an access device, it provides capabilities like 1GE/10GE, MPLS, H-QoS, Services, GPS clocking, PoE and fit within ETSI 300 mm depth cabinet. It can easily be integrated into the Unified MPLS for Mobile Transport (UMMT) and Fixed Mobile Convergence (FMC) solution.

Cisco ASR 920 Router Features

The router provides 1GE/10GE, MPLS, H-QoS, high availability hardware design, advanced Ethernet Operations, Administration, and Maintenance (OAM), as well as advanced timing support, including satellite timing (GNSS) based clocking, and PoE in one platform.

  • ASR-920-12SZ-IM—This router has fixed Ethernet interfaces (8x1G copper + 4x1G SFP + 4x10G/1G (dual rate)
  • ASR-920-12SZ-IM-CC—Has the same specifications as the above variant. However, this chassis is coated with an acrylic-based material to help improve the reliability against air-borne contamination.

The following table provides snapshot of the number and type of supported ports:

ASR 920 Sub-family

1 GE Port

Dual Rate 1G/10G Port

Type of 1 GE Port

ASR-920-12SZ-IM, ASR-920-12SZ-IM-CC

12

41

Te0/0/12 – Te 0/0/15

8 Cu ports Ge0/0/0 – Ge0/0/7

4 SFP ports Ge0/0/8 – Ge0/0/11

1 Each port can operate at either 1G or 10G, and operates in a mutually exclusive way. You cannot insert both 1G and 10G together. If you insert IG IMs (A900-IMA8T1Z, A900-IMA8S1Z, A900-IMA8T, A900-IMA8S), the dual rate port would support only 10G.

GigabitEthernet Copper Ports

Fixed copper GigabitEthernet (GE) interfaces are provided through standard RJ-45 connectors. These ports support the following features:

  • Standard 100/1000Base-T/TX operation with forced or auto-negotiation for speed and duplex.
  • Automatic crossover (auto-MDIX) for straight-through and crossover connections.
  • Pause flow control as defined by the 802.3x standard.
  • Frame size of 9216 bytes.
  • Synchronous ENET operation that provides its recovered receive clock as an input clock source for the SETS as well as uses the system-wide reference clock to derive its transmit clock.

GE SFP Ports

The GE SFP ports support the following features:

  • 100Base-FX and 1000Base-X SFP modules.
  • Digital optical monitoring as specified by the SFP.
  • Any mix of SFPs is supported unless specifically noted.

Note
Smart SFPs are not supported on the router.
  • Pause flow control as defined by the 802.3x standard.
  • Frame size of 9216 bytes.
  • Synchronous ENET operation that provides its recovered receive clock as an input clock source for the SETS as well as uses the system-wide reference clock to derive its transmit clock.

Note
Copper based SFPs do not support synchronous ENET operations.

SFP+ Ports

The SFP+ ports support the following features:

  • Digital optical monitoring as specified by the optical transceiver module.

  • Any mix of SFPs is supported unless specifically noted.

  • Pause flow control as defined by the 802.3x standard.

  • Frame size of 9216 bytes.

The following figures show the port numbering for the Cisco ASR 920 router:

Figure 1. Front Panel of Cisco ASR-920-12SZ-IM Router—With DC Power Supply

Figure 2. Front Panel of Cisco ASR-920-12SZ-IM Router—With AC Power Supply

1

Power Supply 0 (AC or DC)

10

Alarm port

2

Power Supply 1 (AC or DC)

11

Eight Copper port (1G PoE)

Note   

Port 0 is located at the bottom right, port 1 is located at the top right, and so on.

3

Front Air-Inlet Area

12

ToD port

4

GNSS RF IN (SMA threaded connector)

13

Management Port

5

DIN 1.0/2.3 Snap-in connector (10MHZ)

14

USB Memory port

6

DIN 1.0/2.3 Snap-in connector (1PPS)

15

USB Console port

7

Four 1G/10G SFP+

16

Zero Touch Provisioning button

8

Interface Module

17

RS232 Console port

9

Four 1G SFP

18

RS232 Aux Console port

Figure 3. Rear View of Cisco ASR-920-12SZ-IM Router

1

Fan tray

3

Air vents

2

Grounding lug

—

The following table describes the other features of Cisco ASR-920-12SZ-IM (AC and DC) Router.

Table 1 Cisco ASR-920-12SZ-IM Router Specifications

Specification

ASR-920-12SZ-IM

DimensionWidth x Depth x Height

17.5 x 9.88 x 1.73 inches

Weight

Total weight: 4.83 kg

Weight of PSU: 0.59 kg

Weight of Fan: 0.33 kg

Rack Unit

One RU

Airflow

Front to back

Cable access

Front cable access

System throughput

60 Gbps, 95 Mpps

Power Supply

  

Redundant

Yes

AC

Yes

Voltage Range

85V AC to 264V AC, nominal 100/240 VAC

Frequency Range

47 Hz to 63 Hz, nominal 50/60 Hz

Maximum Power

360 W

DC

Yes

Voltage Range

-18 VDC to -32 VDC or -40 VDC to -72 VDC

Nominal Voltage Range

-24 VDC/-48 VDC/-60 VDC

Maximum Power

375 W

Operating Temperature

–40º C to 70º C

Alarms

  • 4 alarm dry contact inputs (normally open)

  • LED indicators for critical, major, and minor alarms

Supported Interface Modules

For more information on these IM modules, see the Cisco ASR 903 Aggregation Series Router Hardware Installation Guide.

For more information on the supported IMs, see the Cisco ASR920 Data sheet.

Mounting option

  • Front or rear rail 19 or 23 inches

  • ETSI 300 mm open cabinet

  • Wall mount

Port Configuration

12x1G and 4x10G/1G ports

Port Numbering

4x10G SFP+ – Port [12:15]

4x1G SFP – Port [8:11]

8x1G PoE RJ45/Cu ports [0:7]

Combo Ports

Ports 12 to 15 are Dual Rate ports

Copper/1G/10G Port LEDs

Link/Activity/Fault

Temperature Sensors

Four temperature sensors

1PPS/ToD

External ports for 1PPS/TOD

PoE

Provides power over Ethernet

GNSS

Connects to the external GPS

Figure 4. Cisco ASR-920-12SZ-IM Router—Dimensions

External Interfaces

The external physical interfaces on the front panel of the router are given below:

Network Interfaces

The network interfaces are provided through fixed ports.

  • GE SFP ports—supports 100/1000 modes
  • GE Copper RJ-45 ports—supports 10/100/1000 operation. All eight copper RJ-45 ports support PoE/PoE+/UPoE with overall power budget of 180 W.

Note
PoE is not supported when the system is powered with 24 V DC.
  • 10GE SFP+—supports 10G/1G mode depending on the SFP+/SFP in the network interface slot.

Network Timing Interfaces

  • 10Mhz input or output—Miniature coaxial connectors for 10Mhz timing (input or output). You can use this interfaces with an external GPS device to send or receive clocking from the router
  • 1PPS input or output and ToD input or output—This interface is used for input or output of time-of-day (ToD) and 1PPS pulses. ToD format includes both NTP and IEEE 1588-2008 time formats.

The same RS422 pins for 1PPS and TOD are shared between input and output directions. The direction for each can be independently configured through software.

  • GNSS RF IN—This interface is used to connect the external GPS antenna to the in-built GPS module.

External Alarm Inputs

The router supports four dry contact alarm inputs through an RJ-45 jack on the front panel.

  • Normally Open—indicates that no current flows through the alarm circuit and the alarm is generated when the current is flowing.

Each alarm input can be provisioned as critical, major, or minor.

Management Interfaces

The following management interfaces are supported:

Management ENET Port

A single management copper ENET port supporting 100/1000Base-T operation is provided on the front panel. It uses a standard RJ-45 jack.

RS232 Console Port

The RS232 console port provides transmission (Tx), reception (Rx), and ground (Gnd).


Note
The RS232 console port is enabled only through the Cisco-designed cable adapter USB type A cable to RJ-45 adapter cable. To use this port, disable the flow control on the terminal.

Caution

Do not plug the USB-to-RJ45 adapter cable in the USB Memory port.

USB Console

A single USB 2.0 Type-A receptacle on the front panel of the router provides console access to ROMMON, Cisco IOS-XE and diagnostics. While it uses the Type-A connector, it operates as a USB peripheral only for connection to an external host computer. This interface requires the use of a Type-A to Type-A connector instead of a standard USB cable.


Note
Use of the USB console is mutually exclusive of the RS232 console port. This interface requires the use of a Type-A to Type-A USB cable.

USB Mass Storage

A single USB 2.0 Type-A receptacle on the front panel of the router allows external USB mass storage devices, such as standard USB flash drives. This interface is used to load images, load or store configurations, write logs, and so on.


Note
More than 8 GB is not supported in ROMMON mode,

Zero Touch Provisioning Button

The Zero Touch Provisioning (ZTP) button on the front panel initiates the ZTP process on a short press of less than eight seconds. Pressing the ZTP button for more than eight seconds causes a board reset.

RS232 Auxiliary Console Port

The RS232 Aux console port provides transmission (Tx), reception (Rx), and ground (Gnd).


Note
The RS232 Aux console port is enabled only through the Cisco-designed cable adapter from USB type A cable to RJ-45 adapter cable.

Note
This is a debug-only port. it is recommended that this port be used by field service engineers only.

Power Supply and Fans

The router supports AC, D, or a combination of both power supplies in a 1+1 redundant configuration.

Table 2 Power Supply Specification

Specification

AC (A920-PWR400-A)

DC (A920-PWR400-D)

Voltage

100 V – 240 V

24 V – 60 V

Current

5A through a standard C16 type receptacle

20A through a two-position terminal block

Input Power

360 W

375 W

Note
This product requires surge protection as part of the building installation. To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, an external surge protective device (SPD) is required at the AC power service equipment.

Note
For DC systems, if a surge of more than 500 V is expected, add an appropriate external surge protective device.

The router has a single fan-tray with four fans. The system is designed to operate at its maximum operating temperature of 70º C, in case of failure of a single fan operating temperature of 65º C. The fan tray is field-replaceable.

LED Indicators

This section describes the different types of LEDs and their behavior.

PWR and STAT LEDs

The PWR LEDs are available on the front panel. These LEDs provide power on the board (PWR) status. During power up state, these LEDs provide booting status and report errors.


Note
The digital code signing functionality validates the integrity and authenticity of the ROMMON image before booting it.
Table 3 PWR and STAT LED Indications

PWR LED State

STAT LED state

Indication

Comment

Amber

Off

Power in the system is all right and FPGA configuration is taking place.

Permanent Amber/Off indicates FPGA configuration failure.

Amber

Red

FPGA Image Validation Error.

System is in unresponsive state.

Flashing Amber and Green alternatively

Amber

Upgrade FPGA image error, continuing with Golden FPGA image.

—

Flashing Amber and Green alternatively

Off

FPGA configuration successful and Digital code signing successfully validated FPGA image. Digital code signing passed the control to Microloader to boot ROMMON.

—

Flashing Amber and Green alternatively

Red

Digital code signing reported failure in ROMMON image validation.

—

Flashing Amber

Flashing Amber

ZTP process has begun.

Note    A short press of the ZTP button triggers the provisioning. A longer press of more than eight seconds, resets the board.

Both LEDs turn Green once provisioning is complete.

Green

Off

IOS-XE image is booting.

Green

Green

Successfully booted and system is operating normally.

—

Green

Amber

A minor alarm or synchronization is in Holdover or free-running mode

—

Green

Red

A major or critical alarm (high temperature reported for any sensor) or multiple fan failure.

—

CPU Management Port LEDs

The LED for the 100/1000 Management port is integrated on the connector itself. There are two LEDs in the connector—the LED on the left indicates the Link/Activity status and the LED on the right indicates the duplex status of the link.

Table 4 CPU Management Port LED Indication

LED

LED State

Indication

Left

Green

Link up in 1000 Mbps

Blinking Green

Activity in 1000 Mbps

Amber

Link up in 100 Mbps

Blinking Amber

Activity in 100 Mbps

Off

Link down

Right

Green

Link up in full duplex

Off

Link up in half duplex

SFP LEDs

Each SFP port has an LED indicator.

Table 5 SFP Port LED Indication

LED

LED State

Indication

Labeled same as the SFP port number

Green

Link up in 1000Base-X/100Base-FX

Blinking Green

Activity in 1000 Base-X/100Base-FX

Amber

Fault/Error/Link down

Off

Administratively down

SFP+ LEDs

Each SFP+ port has an LED indicator.

Table 6 SFP+ Port LED Indication

LED

LED State

Indication

Labeled same as the SFP port number

Green

Link up in 10G/1G

Blinking Green

Activity in 10G/1G

Amber

Fault/Error/Link down

Off

Administratively down

RJ-45 LEDs

There is only one LED on each RJ45 port on the fixed slot (slot 0/0) and this indicates only the link or speed status. There is no LED to show the Duplex state. However, there are two LEDs for IM RJ45 ports and they indicate the Link and Duplex state.

Table 7 RJ-45 LED Indication

LED State

Indication

Green

Link up in 10/100/1000Base-T

Blinking Green

Activity in 10/100/1000Base-T

Amber

Fault/Error/Link down

Off

Administratively down

Power Supply Unit LEDs

Each power supply unit has a corresponding LED on the front panel.

Table 8 PSU LED Indication

Power LED

FAIL LED

Power Supply Condition

Green

Off

Power Supply ON; valid input/output

Yellow 1Hz blinking

Red 1Hz blinking

PSU Warning due to OCP, OTP, UV, OV, OP, abnormal fan operation

PSU continues to operate

Off

On

PSU failure due to OCP, OTP, UV, OV, OP, abnormal fan operation. No valid output.

Green 1Hz blinking

Off

Valid power present, shutdown by system.

Yellow

Off

Input voltage low

Off

Off

No valid power input.

System–Interface LED Behavior

Table 9 1G Copper and 1G SFP LED Indication

Event

1G Copper Port LEDs (Link)

1G SFP Port LEDs

ROMMON

Off

Off

IOS Shut

Off

Off

IOS No shut (cable disconnect)

Amber

Amber

IOS No shut (Link Up)

Green

Green

Table 10 Dual Rate Port LED Indication

Event

Dual Rate (1G/10G) Port LEDs

ROMMON

Off

IOS Shut

Off

IOS No shut (cable disconnect)

Amber

IOS No shut (Link Up)

Green

Table 11 Management Port LED Indication

Event

Management Port LEDs (Link/Duplex)

ROMMON

Green/Off

IOS Shut

Off/Off

IOS No shut (cable disconnect)

Amber/Off

IOS No shut (cable connect)

Green/Green in 1G mode

Amber/Green in 100M mode

Online Insertion and Removal

This router supports the following OIR operations:

  • When an SFP is removed, there is no effect on traffic flowing on other ports.
  • When an SFP is installed, the system initializes that port for operation based upon the current configuration. If the inserted SFP is incompatible with the current configuration for that port, the port does not become operational until the configuration is updated.
  • Both power supplies are installed and active and the load may be shared between them or a single PSU could support the whole load. When a power supply is not working or the input cable is removed, the remaining power supply takes the entire load without disruption.

  • When a fan tray is removed or replaced, there is no need to power down the router. However, when the fan tray is removed from the router, the router shuts down automatically after some time, depending on the ambient temperature. The time duration before the router shuts down is shown in the table below:

Licensing

The router supports the following types of licenses:

  • Port Licensing—Port Upgrade license is available as a "Pay as you Grow" model.
    • 6 ports 1GE upgrade license
    • 2 ports 10G upgrade license
    • Bulk License to enable 12x1port 1GE and 4x10GE ports
  • Advanced Metro IP Access
  • Metro IP Access
  • Metro Access (default)
  • Feature licensing

The following methods are used to activate the above licenses:

  • Cisco Software Licensing—The Cisco Software License Activation feature is a set of processes and components to activate Cisco software feature sets by obtaining and validating fee-based Cisco software licenses.

Note
Licenses generated by the Cisco Software Licensing are tied to the UDI of the chassis and a corresponding watchtower device certificate (WDC) is stored in the system.
  • Cisco Smart Licensing—Smart Licensing is usage-based licensing where devices register with the Cisco Secure server.