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Voice, IP, and ATM MPLS Features

  • Sample Chapter is provided courtesy of Cisco Press.
  • Date: May 17, 2002.

RPM Memory Locations

The RPM card module has several memory locations that it uses to store and manage software code, configuration information, and other information.

The RPM boot Flash is used to store a boot image. This boot image is used by the RPM if a suitable IOS image is unavailable. When you install a new RPM, the boot image is loaded, and you must configure the RPM to upload the IOS image from the PXM1 hard drive.

The startup configuration file is stored in nonvolatile random-access memory (NVRAM).

Dynamic random-access memory (DRAM) on the RPM is used to run the IOS software, and it stores a working copy of the configuration files. As soon as the initial RPM configuration is done, the RPM uploads the IOS image into DRAM.

Static random-access memory (SRAM) on the RPM is used for shared-memory switching of packets. This memory is used when routing data packets from one interface to another.

NOTE

Unlike many Cisco routers, the RPM does not support optional Flash cards.

The PXM1 has an IDE hard drive that the MGX switch uses to store firmware and configuration files. The RPM also utilizes this drive for IOS image and configuration storage. If you want to store the IOS image or RPM configuration file on the PXM hard drive, you must do so manually from the RPM CLI.

19. RPM Port Numbering | Next Section Previous Section

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