Brand: Cisco
Category: Networking
Document Type: Installation Guide
Language: EN
Installation Guide for NCS 540
Uploaded: Sept. 12, 2025, 4:19 a.m.
Manual Publish Date: 2021-07-30
Safety Warnings
This section outlines critical safety warnings to prevent injury and equipment damage. It covers standard warnings, personal safety, equipment protection, module installation, electrical safety, power supply considerations, and ESD prevention.
Cisco NCS 540 Router Overview
This section provides an overview of the Cisco NCS 540 1RU router, detailing its variants and hardware features, including various port types like SFP+, SFP28, and QSFP28. It also describes network interface configurations.
Specification and Interface Naming
Details on physical specifications, temperature, and processor information are available. This section clarifies the naming conventions for different interface types such as GigE, TenGigE, and HundredGigE, including their port numbering schemes across various router models.
Appendices
The appendices provide detailed information on router LEDs, fan assembly LEDs, power supply LEDs, system specifications, environmental specifications, transceiver and cable specifications, connector pinouts (RJ-45, GPS, ToD/1-PPS, BITS, Management/PTP Ethernet, USB, Alarm), console port pinouts, and AC power cord specifications.
Troubleshooting and error codes
| LED | Color | Status |
|---|---|---|
| STATUS | Green | The module is operational and has no active major or critical alarms. |
| Amber | Host kernel is booted and is ready to start SysAdmin VM. | |
| Red | Power-up failure is preventing the CPU from booting (set by hardware). | |
| Flashing Amber (Slow) | The module is booting up (set by IOFPGA). | |
| Flashing Amber (Fast) | The module is booting up (set by BIOS), shutting down, or the SysAdmin VM is being reloaded. | |
| Flashing Red | RPO has active major or critical alarms. | |
| ALARM | Red | Critical alarm - system-scope (including RP0). |
| Flashing Red | Critical alarm - Relating to voltage rail failures. | |
| Amber | Major alarm - system-scope (including RP0). | |
| Flashing Amber | Minor alarm - system-scope (including RP0). | |
| Off | No alarm. | |
| SYNC | Green | Time core is synchronized to an external source including IEEE1588. |
| Flashing Green | System is in Synchronous Ethernet mode. | |
| Amber | Acquiring state or Holdover: Time core is in acquiring state or holdover mode. | |
| Off | Time core clock synchronization is disabled or in free-running state. | |
| STATUS + ALARM (Both LEDs) | Flashing Red | Secure Boot boot flash contents validation failed. (set by IOFPGA). This case is only applicable immediately after power-on. |
| Off | The module is powered-off (set by hardware). | |
| TIMING | Off | GPS config and GPS port is down. Time-of-day (ToD), 1PPS, and 10 MHz ports are not provisioned or disabled. |
| Amber | ToD, 1PPS, and 10 MHz signals are not valid. | |
| Green | GPS port is up. ToD, 1PPS, and 10 MHz signals are valid. |