Troubleshooting Aids

Certain troubleshooting aids of the Cisco ASR 920 Router enable you to perform these tasks that assist the troubleshooting process:

Verify Pinout

Pinouts provide input signal (to the device) and output signal (from the device) information. Bits (BITS) port, GPS Port (1PPS and 10MHz), USB Console (CONSOLE) port, Time-of-Day (TOD) port, Alarm (ALARM) port, USB (USB CON and USB MEM) port, and Management Ethernet (MGMT) port pinout information is provided in the following sections.

BITS Port Pinouts

The following table summarizes the BITS port pinouts.

Table 1. BITS Port Pinouts

Pin

Signal Name

Direction

Description

1

RX Ring

Input

Receive Ring

2

RX Tip

Input

Receive Tip

3

—

—

Not used

4

TX Ring

Output

TX Ring

5

TX Tip

Output

TX Tip

6

—

—

Not used

7

—

—

Not used

8

—

—

Not used

GPS Port Pinouts

The following table summarizes the GPS port pinouts.


Note
The 10 Mhz and 1 PPS interfaces can be configured as input or output using Cisco IOS CLI commands. For more information, see the Cisco ASR 920 Series Aggregation Services Router Configuration Guide.
Table 2. GPS Port Pinout

10 Mhz (input and output)

1PPS (input and output)

Waveform

Input—Sine wave

Output—Sine or square wave

Input—Pulse shape

Output—Pulse shape

Amplitude

Input— > 1.7 volt p-p (+8 to +10 dBm)

Output— > 2.4 volts TTL compatible

Input— > 2.4 volts TTL compatible

Output— > 2.4 volts TTL compatible

Impedance

50 ohms

50 ohms

Pulse Width

50% duty cycle

26 microseconds

Rise Time

Input—AC coupled

Output—5 nanoseconds

40 nanoseconds

Time-of-Day Port Pinouts

The following table summarizes the ToD/1-PPS port pinouts.

Table 3. RJ-45 1PPS/ToD Port Pinouts

Pin

Signal Name

Direction

Description

1

RESERVED

Output

Do Not Connect

2

RESERVED

Input

Do Not Connect

3

1PPS_N

Output or Input

1PPS RS422 signal

4

GND

—

—

5

GND

—

—

6

1PPS_P

Output or Input

1PPS RS422 signal

7

TOD_N

Output or Input

Time-of-Day character

8

TOD_P

Output or Input

Time-of-Day character

Alarm Port Pinouts

The following table summarizes the external alarm input pinouts.

Table 4. External Alarm Input Pinouts

Pin

Signal Name

Description

1

ALARM0_IN

Alarm input 0

2

ALARM1_IN

Alarm input 1

3

—

No connect

4

ALARM2_IN

Alarm input 2

5

ALARM3_IN

Alarm input 3

6

—

No connect

7

—

No connect

8

COMMON

Alarm common

Management Ethernet Port Pinouts

The following table summarizes the Management Ethernet port pinouts.

Table 5. Fan Alarm Port Pinout

Pin

Signal Name

1

TRP0+

2

TRP0-

3

TRP1+

4

TRP2+

5

TRP2-

6

TRP1-

7

TRP3+

8

TRP3-

USB Console Port Pinouts

The following table summarizes the USB console port pinouts.

Table 6. Single USB Console Port Pinouts

Pin

Signal Name

Description

A1

Vcc

+5VDC

A2

D-

Data -

A3

D+

Data +

A4

Gnd

Ground


Note
The USB console port +5VDC is input, and operates as an USB peripheral device.

USB MEM Port Pinouts

The following table summarizes the USB MEM port pinouts.

Table 7. Single USB MEM Port Pinouts

Pin

Signal Name

Description

A1

Vcc

+5VDC (500mA)

A2

D-

Data -

A3

D+

Data +

A4

Gnd

Ground

Note
USB TYPE-A receptacle is used.

Note
The USB MEM port +5VDC is output. Cisco ASR 920 Router provides power for USB MEM port. This port operates as a USB host device.

Check Optical Fiber Specifications

The specification for optical fiber transmission defines two types of fiber: single mode and multimode. Within the single-mode category, three transmission types are defined: short reach, intermediate reach, and long reach. Within the multimode category, only short reach is available. For information about optical SFP modules, see the documentation for the SFP module at:

http://www.cisco.com/en/US/partner/products/hw/modules/ps5455/prod_installation_guides_list.html .

Check Alarm Conditions

The following table summarizes the meaning of the alarm conditions on the Cisco ASR 920 Router.

Table 8. Alarm Condition Summary

Alarm Type

Alarm Meaning

Critical

Port in down state.

Environmental sensor threshold exceeded critical level (voltage, temperature)

Major

Environmental sensor threshold exceeded major level (voltage, temperature)

Info

Port administratively shut down.

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.
Table 9. 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. No console messages.

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.

System is in unresponsive state. No console messages.

Green

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.
Table 10. CPU Management Port LED Indication

LED

LED State

Indication

Left

Green

Link up in 1000 Mbps

Blinking Green

Activity in 1000 Mbps

Amber/Orange

Link up in 100/10 Mbps

Blinking Amber/Orange

Activity in 100/10 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.

Table 11. 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

Yellow

Fault/Error

Off

Link down

SFP+ LEDs

Each SFP+ port has an LED indicator.

Table 12. SFP+ Port LED Indication

LED

LED State

Indication

Labeled same as the SFP port number

Green

Link up in 10G

Blinking Green

Activity in 10G

Yellow

Fault/Error

Off

Link 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.

Table 13. RJ-45 LED Indication

LED

LED State

Indication

Left

Green

Link up in 10/100/1000Base-T

Blinking Green

Activity in 10/100/1000Base-T

Yellow

Fault/Error/Link down

Off

Administratively 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.

Table 14. PSU LED Indication

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

Table 15. 1G Copper and 1G SFP LED Indication

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

Table 16. Management Port LED Indication

Event

10G Port LEDs

Management Port LEDs (Link/Duplex)

ROMMON (cable connect)

Off

Green/Green (1000 Mbps, Full Duplex)

Orange/Green (100/10 Mbps, Full Duplex)

ROMMON (cable disconnect)

Off

Off/Off

IOS Shut

Off

Off/Off

IOS No shut (cable disconnect)

Orange

Off/Off

IOS No shut (cable connect)

Green

Green/Green in 1G mode

Orange/Green in 100/10M mode