J4350 and J6350 Routing Engine Hardware

The Routing Engine consists of the following components. For more information, see Software Overview.

• Processor—Creates the packet forwarding switch fabric for the router and runs JUNOS software to maintain the router's routing tables and routing protocols.
• DRAM—Buffers incoming packets and provides storage for the routing and forwarding tables and for other Routing Engine processes.

  To view the amount of DRAM installed on your router, issue the show chassis routing-engine command.

• EPROM—Stores the serial number of the Routing Engine.

  To view the serial number of the Routing Engine, issue either the show chassis routing-engine command or the show chassis hardware command.

• Crypto Accelerator Module—Processor card that enhances performance of cryptographic algorithms used in IP security (IPSec) services. The cryptographic algorithms supported include Advanced Encryption Standard (AES), Data Encryption Standard (DES), triple DES (3DES), Hashed Message Authentication Code-Message Digest 5 (HMAC-MD5), and HMAC-Secure Hash Algorithm 1 (SHA-1).

  To determine whether there is a Crypto Accelerator Module installed on your router, issue the show chassis hardware command.

• Compact flash—Provides primary storage for software images, configuration files, and microcode. J4350 and J6350 routers have a slot on the motherboard for an internal compact flash. For information about replacing the compact flash, see Replacing Internal Compact Flashes on J4350 and J6350 Routers.