Cisco ASR 920 Router Features
The Cisco ASR 920 family of routers includes:
- ASR 920-Indoor version [ASR-920-12CZ-A / ASR-920-12CZ-D]—This sub-family has fixed ENET interfaces (12 x 1GE + 2 x 10GE or 2 x 1GE or any combinations of 1 GE and 10 GE among the two ports available) and dual power supplies (AC/DC).
- ASR 920-Compact version [ASR-920-4SZ-A / ASR-920-4SZ-D]—This sub-family of routers have a compact form factor and configurable ports: 4 x 1 GE or 4 x 10 GE or any combinations of 1 GE and 10 GE among the four ports available. In addition, there are 2 x 1 GE copper ports available.
The following table provides snapshot of the number and type of supported ports:
|
ASR 920 Sub-family |
1 GE Port |
10 GE Port |
Type of 1 GE Port |
Type of 10 GE Port |
|---|---|---|---|---|
|
ASR-920-12CZ-A / ASR-920-12CZ-D |
12 |
21 |
8 Combo + 4 SFP |
Built in 2 SFP+ (dual rate) |
|
ASR-920-4SZ-A / ASR-920-4SZ-D |
2 |
41 |
2 Copper |
Built in 4 SFP+ (dual rate) |
GigabitEthernet Copper Ports
Fixed copper GigabitEthernet (GE) interfaces are provided through standard RJ-45 connectors. These ports support the following features:
- Standard 10/100/1000Base-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 |
Only six Smart SFPs are 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 and Smart 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.
-
Smart SFPs do not support synchronous ENET operations
The following figures show the port numbering for the Cisco ASR 920 router:
|
1 |
Power Supply 0 (AC or DC) |
10 |
Eight Copper port |
||
|---|---|---|---|---|---|
|
2 |
Power Supply 1(AC or DC) |
11 |
1G/10G Dual Rate port |
||
|
3 |
Power Supply 0 LED (AC or DC) |
12 |
1G/10G Dual Rate port |
||
|
4 |
Power Supply 1 LED (AC or DC) |
13 |
USB Console port |
||
|
5 |
RJ-48 slots for BITS (upper slot) and ToD (lower slot) |
14 |
Alarm port |
||
|
6 |
Management port |
15 |
USB Memory port |
||
|
7 |
Console port (TIA/EIA-232F) |
16 |
Board power LED |
||
|
8 |
Auxiliary Console port |
17 |
Zero Touch Provisioning button |
||
|
9 |
4x1GE SFP + 8x1GE SFP combo ports
|
18 |
System Status LED |
|
1 |
Power Supply 0 (AC or DC) |
9 |
2 1GE Copper ports |
||
|---|---|---|---|---|---|
|
2 |
Power Supply 1 (AC or DC) |
10 |
Four 1G/10G Dual Rate Ports
|
||
|
3 |
Power Supply 0 LED (AC or DC) |
11 |
USB Console port |
||
|
4 |
Power Supply 1 LED (AC or DC) |
12 |
Alarm port |
||
|
5 |
RJ-48 slots for BITS (upper slot) and ToD (lower slot) |
13 |
USB Memory port |
||
|
6 |
Management port |
14 |
Board power LED |
||
|
7 |
Console port (TIA/EIA-232F) |
15 |
Zero Touch Provisioning button |
||
|
8 |
Auxiliary Console port |
16 |
System Status LED |
The table below describes the other features of Cisco ASR-920-12CZ (AC and DC) and Cisco ASR-920-4SZ (AC and DC) Routers.
|
Specification |
ASR-920-12CZ-A/ASR-920-12CZ-D |
ASR-920-4SZ-A/ASR-920-4SZ-D |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
DimensionWidth x Depth x Height |
17.5 x 9.25 x 1.75 inches |
15.5 x 9.25 x 1.75 inches |
||||||||
|
Weight |
ASR-920-12CZ-A: 3.80 kg ASR-920-12CZ-D: 3.54 kg |
ASR-920-4SZ-A: 3.50 kg ASR-920-4SZ-D: 3.22 kg |
||||||||
|
Rack Unit |
One RU |
One RU |
||||||||
|
Airflow |
Front to back |
Front to back |
||||||||
|
Cable access |
Front cable access |
Front cable access |
||||||||
|
System throughput |
32 Gbps |
42 Gbps |
||||||||
|
Power Supply |
||||||||||
|
Modularity |
None |
None |
||||||||
|
Redundant |
Yes |
Yes |
||||||||
|
AC |
Yes |
Yes |
||||||||
|
Power Specification |
115 W |
105 W |
||||||||
|
DC |
Yes |
Yes |
||||||||
|
Power Specification |
110 W |
105 W |
||||||||
|
Operating Temperature |
–40º C to 70º C
|
–40º C to 70º C
|
||||||||
|
Alarms |
|
|
||||||||
|
TDM Support |
None |
None |
||||||||
|
Mounting option |
|
|
||||||||
|
Port Configuration |
12x1G and 2x10G/1G ports |
2x1G and 4x10G/1G ports |
||||||||
|
Port Numbering |
4x1G SFP – Port [0:3] 8x1G Combo – Port [4:11] 2x10G – Port [12-13] |
2x1G Copper – Port [0:1] 4x10G – Port [2-5] |
||||||||
|
Combo Ports |
Ports 4 to 11 are combo ports |
No combo ports |
||||||||
|
Copper Port LEDs |
Link/Activity/Duplex LED indication |
Link/Activity/Duplex LED indication |
||||||||
|
Temperature Sensors |
Four temperature sensors |
Three temperature sensors |
||||||||
|
BITS/ToD |
External ports for BITS/TOD |
External ports for BITS/TOD |
Limitation
When a P router acts as a mid-node and has a multicast receiver connected to it, for a default Multicast Distribution Tree (MDT), the packets that reach the multicast receiver from the ingress Provider Edge (PE) receive Experimental Bits (EXP). But, marking is lost when the same stream egresses out from the P router towards another PE router that has the same multicast receiver connected to it .
External Interfaces
The Cisco ASR 920 routers have these external physical interfaces on the front panel:
Network Interfaces
The network interfaces are provided through these fixed ports:
-
GE SFP ports—supports 100/1000 modes
-
GE Copper RJ-45 ports—supports 10/100/1000 operation
-
10GE SFP+—supports 10G/1G mode depending on the SFP+/SFP in the network interface slot
Network Timing Interfaces
- BITS input or output—The BITS interfaces support clock recovery from either a T1 at 1.544 MHz or an E1 at 2.048 MHz, configurable by software. BITS interface is provided through a standard RJ-48 connector on the front panel.
- 1PPS input or output and ToD input or output—This shielded RJ-45 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 configurable through software.
External Alarm Inputs
The device supports four dry contact alarm inputs through an RJ-45 jack on the front panel.
The alarm condition is normally open, which 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 being critical, major, or minor.
Management Interfaces
The Cisco ASR 920 routers have the following management interfaces:
Management ENET Port
A single management copper ENET port supporting 10/100/1000Base-T operation is provided at the front panel. It uses a standard RJ-45 jack.
Note |
The management ENET port is not a data plane port. |
RS232 Console Port
The RS232 console port provides transmission (Tx), reception (Rx), and grounding (Gnd).
Note |
The RS232 console port is enabled through only 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. |
USB Console
A single USB 2.0 Type-A receptacle is provided on the front panel of the Cisco ASR 920 router for providing 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 is provided on the front panel of the Cisco ASR 920 router for inserting 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. It supports operation up to 12Mbps.
Maximum memory supported in ROMmon is 8GB and in Cisco IOS is 16GB.
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 system reset.
For more information on ZTP, see Power and Status LED section.
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 routers support AC and DC power supplies in a 1+1 redundant configuration.
One AC and one DC power supply in the same router is also a supported configuration.
Note |
The power supply units are built-in and are not modular. |
|
Specification |
AC |
DC |
|---|---|---|
|
Voltage |
100 V – 240 V |
24 V – 60 V |
|
Current |
2A through a standard C16 type receptacle |
6A through a three-position terminal block |
|
Input Power |
115 W (ASR-920-12CZ-A/ASR-920-4SZ-A) |
105 W (ASR-920-12CZ-D/ASR-920-4SZ-D) |
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 routers have fixed fans are part of the system. The system is designed to operate at its maximum operating temperature of 70º C and at 65º C in case of failure of a single fan, for a maximum of four hours. The fan is not removable and in case of a failure, the system must be replaced.
 Caution |
In case of power supply or fan failure, it is highly recommended to let a Cisco technician replace the router. |
|
Feature Name |
Release Information |
Description |
|---|---|---|
|
Switching Fan Speed |
Cisco IOS XE Cupertino 17.8.1 |
This feature enables the fan speed for Cisco ASR-920-12CZ-A/D and Cisco ASR-920-4SZ-A/D to switch from default dynamic fan speed to static fan speed in the presence of smart SFP. This enables the smart SFPs to function efficiently. |
The dynamic fan-speed algorithm sets the fan speed based on the ASIC temperature.
Prior to Cisco IOS XE Cupertino Release 17.8.1, when the smart SFP was inserted, it would not function with the static fan-speed algorithm mode. This was resulting in the increase of the router's temperature.
Starting with Cisco IOS XE Cupertino Release 17.8.1, when the smart SFP is inserted, the switch from default dynamic fan-speed algorithm to static fan-speed algorithm helps the smart SFP to function efficiently.
Use the show platform fan-algorithm command to verify the fan-speed algorithm configuration for the router:
Router#show platform fan-algorithm
Fan Algorithm : Static
Router#Check LED Indicators
This section describes the different types of front panel LEDs and their behavior.
PWR and STAT LEDs
The PWR and STAT LEDs are available on the front panel. These LEDs provide power on the board (PWR) and overall router health (STAT) 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. |
|
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.
|
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 10/100/1000 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 is non-functional.
Note |
The CPU management port LED on the right is non-functional and hence doesn’t indicate any port status. |
|
LED |
LED State |
Indication |
|---|---|---|
|
Left |
Green |
Link up in 1000 Mbps |
|
Blinking Green |
Activity in 1000 Mbps |
|
|
Orange |
Link up in 100 Mbps |
|
|
Blinking Orange |
Activity in 100 Mbps |
|
|
Off |
Link down |
SFP LEDs
Each SFP port has an LED indicator. The LED is configured such that the up arrow indicates the port on the upside and the down arrow indicates the port on the downside.
|
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 |
|
|
Yellow |
Fault/Error |
|
|
Off |
Link down |
SFP+ LEDs
Each port in sets of GE SFP+ ports has an LED indicator.
|
LED |
LED State |
Indication |
|---|---|---|
|
GE / GE SFP |
Green |
Link up in 10G/1G |
|
Blinking Green |
Activity in 10G/1G |
|
|
Yellow |
Fault/Error/Link down |
|
|
Off |
Admin down |
RJ-45 LEDs
Each RJ-45 port has two LED indicators. Left LED indicates the Link status; right LED indicates the status of the duplex LED.
|
LED |
LED State |
Indication |
|---|---|---|
|
Left |
Green |
Link up in 10/100/1000Base-T |
|
Blinking Green |
Activity in 10/100/1000Base-T |
|
|
Yellow |
Fault/Error |
|
|
Off |
Link down |
|
|
Right |
Green |
Link up in full duplex |
|
Off |
Link up in half duplex |
Power Supply Unit LEDs
Each power supply unit has a corresponding LED on the front panel.
|
LED |
LED State |
Indication |
|---|---|---|
|
OK |
Green |
Power Supply is working and 12V output is alright. |
|
Red |
12V output failure (Either input not present or fault in the power supply unit). |
System–Interface LED Behavior
|
Event |
1G Copper Port LEDs (Link/Duplex) |
1G SFP Port LEDs |
|---|---|---|
|
ROMMON |
Off/Off |
Off |
|
IOS Shut |
Off/Off |
Off |
|
IOS No shut (cable disconnect) |
Yellow/Off |
Yellow |
|
IOS No shut (cable connect) (media-type RJ-45) |
Green/Green |
Off |
|
IOS No shut (cable connect) (media-type SFP) |
Off/Off |
Green |
|
IOS No shut (cable connect) (media-type auto) |
Off/Off |
Green |
|
Event |
Dual Rate (1G/10G) Port LEDs |
Management Port LEDs (Link/Duplex) |
|---|---|---|
|
ROMMON |
Off |
Green/Off |
|
IOS Shut |
Off |
Off/Off |
|
IOS No shut (cable disconnect) |
Orange |
Orange/Off |
|
IOS No shut (cable connect) |
Green |
Green/Green in 1G mode Orange/Green in 100M mode |
Online Insertion and Removal
The Cisco ASR 920 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. If the power supply needs repair, the whole system must be replaced.
Licensing the Cisco ASR 920 Router
The Cisco ASR 920 Series Routers support the following types of licenses:
-
Port Licensing—Port Upgrade license is available as a "Pay as you Grow" model.
- 1G upgrade license
- 10G upgrade license
- Bulk licensing—Bulk port licensing allows you to enable all the ports with a single license.
- Timing license (1588)—Timing license is required if the router is used as a master clock.
- Advanced Metro IP Access
- Metro IP Access
- Metro Access (default)
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.
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