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Juniper was the first North American IP routing vendor to achieve the prestigious TL 9000 certification by the Quality of Excellence for Suppliers of Telecommunications (QuEST) Forum in the router category, for design, development, provision and service and support.



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M40e Routing Engine Components

The Routing Engine (shown in Figure 1) is a two-board system with the components:

  • CPU—Runs JUNOS Software to maintain the router's routing tables and routing protocols. It has a Pentium-class processor.
  • DRAM—Provides storage for the routing and forwarding tables and for other Routing Engine processes.
  • Internal flash disk—Provides primary storage for software images, configuration files, and microcode. The drive is a fixed compact flask disk and is inaccessible from outside the router.
  • Hard disk—Provides secondary storage for log files, memory dumps, and rebooting the system if the internal flash disk fails.
  • PC Card slot—Accepts a removable PC Card, which stores software images for system upgrades.
  • LED—Indicates disk activity for the internal IDE interface. It does not necessarily indicate routing-related activity.
  • Interfaces for out-of-band management access—Provide information about Routing Engine status to devices (console, laptop, or terminal server) that can be attached to access ports located on the Connector Interface Panel (CIP).

    Each Routing Engine has one 10/100-Mbps Ethernet port for connecting to a management network, and two asynchronous serial ports—one for connecting to a console and one for connecting to a modem or other auxiliary device.

  • EEPROM—Stores the serial number of the Routing Engine.
  • Reset button—Reboots the Routing Engine when pressed.

Note: The LEDs that report host module status (including Routing Engine status) are on the craft interface rather than the Routing Engine faceplate.

Note: The appearance and position of electronic components or the PC Card slot on your Routing Engine might differ from Figure 1 and other figures in this document that depict the Routing Engine. These differences do not affect Routing Engine installation and removal or functionality.

Note: For specific information about Routing Engine components (for example, the amount of DRAM), issue the show chassis routing-engine command.

Note: If two Routing Engines are installed, they must both be the same hardware model.

Figure 1: M40e Routing Engine

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Published: 2009-08-27