Cisco Systems Cisco 12404 appendix Power-On/Off Control

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Appendix A Technical Specifications

Maintenance Bus

directly from the power supply and performs the functions of power-up/down control, device discovery, code download, diagnostics, and environmental monitoring and alarms.

Power-On/Off Control

Based on commands it receives from its on-board EPROM and from the master RP, each MBus module directly controls the DC-DC converters on the component to which it is mounted. Each MBus module is tied directly to +5 VDC from the power supply. When power is applied to the Cisco 12404 Internet router, all MBus modules immediately power on. The MBus modules on the RP or CSF immediately turn on the DC-DC converter, powering up the respective card. The line card MBus module waits to power on the line card until it receives a command from the master RP.

•Device discovery—The RP can determine the system configuration using the MBus. A message is sent from the RP over the MBus requesting all installed devices to identify themselves. The response back provides slot number, card and component type.

•Code download—A portion of the line card operating software can be downloaded from the RP to the line card over the MBus. Because the MBus is relatively slow compared to the CSF, only enough code is downloaded to the line card for it to access the CSF and complete the download process.

•Diagnostics—The diagnostic software image is downloaded from the RP to the card under test.

•Environmental Monitoring and Alarms—The MBus module on each component monitors that component’s environment as follows:

–Line cards and the RP are monitored for temperature by two temperature sensors mounted on each card. The MBus module makes voltage adjustments through software for the +2.5, +3.3, and +5 VDC DC-DC converters.

–The CSF is monitored for temperature by two temperature sensors mounted on each card. The MBus module makes voltage adjustments through software for the +2.5, +3.3, and +5 VDC DC-DC converters.

–Environmental monitoring includes voltage monitoring, temperature monitoring, fan tray assembly and rotational sensing for each fan in the fan tray.

 

 

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Contents Overview Technical SpecificationsProduct Architecture Feature DescriptionNebs SpecificationsRequirements Ranges Description ValueAC Power Plugs AC-Powered RoutersRoute Processor AC Power PlugsFigure A-2 Gigabit Route Processor Gigabit Route ProcessorType Size Quantity Description GRP MemoryTotal Dram Product Numbers Dram Sockets Number of DIMMs DramSram LED Types LEDs Description and Power SourceAsynchronous Serial Ports PcmciaPerformance Route Processor Ethernet PortMemory components of the PRP are listed in Table A-7 PRP MemorySdram MEM-PRP-1G= Total Route Memory Cisco Product Number Dimm ModulesNvram MEM-12KRP-FD1G= Flash Disk Size Product NumberLED Types Line Cards Fabric AlarmStatus Definition Consolidated Switch Fabric StatusPower Entry Module Monitoring System Clock CSF FunctionalityClock and Scheduler Functionality Switch Fabric Power Entry ModulesAC Power Entry Module SchedulerFigure A-6 DC Power Entry ModuleDC PEM DC PDUFigure A-8 Fan Tray Assembly Fan Tray AssemblyFigure A-9 Internal Air Flow-Top View Figure A-10 Cisco 12404 Internet Router Air Filter Location Air FilterChassis Cable-Management System Maintenance BusPower-On/Off Control OL-11636-01
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Cisco 12404 specifications

The Cisco 12404 is a robust router designed for service providers and large enterprises, aiming to deliver high performance, scalability, and flexibility in networking. As part of the Cisco 12000 Series, the 12404 is built to address the demands of high-bandwidth applications and a growing number of users in modern networks.

One of the standout features of the Cisco 12404 is its versatility. The router supports various modules for enhanced functionality, including high-speed interfaces, advanced processing capabilities, and additional memory. This modular design allows organizations to customize their router according to specific networking needs and expand as requirements evolve.

In terms of performance, the Cisco 12404 is equipped with a high-capacity forwarding engine that ensures rapid data transfer and low latency. This capability is crucial for businesses that rely on real-time communication, such as VoIP and video conferencing. The router supports a variety of protocols, including IP, MPLS, and Ethernet, making it adaptable to diverse operational environments.

Scalability is another significant characteristic of the Cisco 12404. It can handle thousands of routes and high volumes of traffic, making it suitable for ISPs managing large subscriber bases. With its support for 10 Gigabit and 100 Gigabit Ethernet interfaces, the router can accommodate increasing data loads without compromising performance.

Advanced features like Quality of Service (QoS) enable network administrators to prioritize traffic based on the type or importance of data. This ensures that critical applications receive the bandwidth they need while less essential services are deprioritized, thus optimizing overall network efficiency.

The Cisco 12404 also integrates advanced security measures to protect sensitive data as it flows through the network. With features like Access Control Lists (ACLs), Virtual Private Network (VPN) support, and encryption capabilities, organizations can safeguard their information against potential threats.

In conclusion, the Cisco 12404 presents a compelling solution for organizations seeking a high-performance router with scalability and versatility. By combining advanced routing technologies, modular design, and robust security features, it stands out as a reliable choice for enterprises and service providers looking to optimize their core networking infrastructure.
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