Jumpers - Cisco 7000 Hardware Installation And Maintenance

Physical Description
NVRAM
Nonvolatile random-access memory (NVRAM) stores the system configuration and the
environmental monitoring logs, and is backed up with built-in lithium batteries that retain the
contents for a minimum of five years. When replacing an RP, be sure to back up your configuration
to a remote server so that you can retrieve it later. (See the Timesaver note that follows.)
Timesaver
Protocol (TFTP) file server so that you can later retrieve it. If the configuration is not saved, the entire
configuration will be lost—inside the NVRAM on the removed route processor—and you will have
to reenter it manually. This procedure is not necessary if you are temporarily removing an RP you
will reinstall; lithium batteries retain the configuration in memory until you replace the RP in the
system.
Flash Memory
The Cisco 7000 contains two types of Flash memory: onboard (embedded) and on a (Flash memory)
card that can be optionally installed in a slot on the RP (or RSP7000). The Flash memory card is
required for downloading software images larger than 4 MB (compressed). Cisco IOS Release 11.0
and later require a Flash memory card.
Either the onboard Flash memory (on a SIMM) or the Flash memory card allows you to remotely
load and store multiple Cisco IOS and microcode images. You can download a new image over the
network or from a local server and then add the new image to Flash or replace the existing files. You
can also transfer images between Flash memory cards and the onboard 8-MB Flash memory.
You can then boot routers either manually or automatically from any of the stored images. Flash
memory also functions as a TFTP server to allow other servers to remotely boot from stored images
or to copy them into their own Flash memory. For security of the onboard Flash memory, jumper J2,
which is adjacent to the embedded Flash memory components, provides Flash memory write
protection. (See the section "Jumpers," which follows.)
The Flash memory card installs in the card slot on the RP (or RSP7000) faceplate. This card is an 8-
or 16-MB, Intel Series 2+ Flash memory card, which conforms with the Personal Computer Memory
Card International Association (PCMCIA) format. For more information, see the section, "Using the
Flash Memory Card" in the chapter "Installing the Router."
EEPROM
An electronically erasable programmable read-only memory (EEPROM) component on the RP (and
on the SSP [or SP] and each interface processor) stores board-specific information such as the board
serial number, part number, controller type, hardware revision, and other details unique to each
board. In addition to this standard information, the RP EEPROM also contains an address allocator,
which is a bank of 40 hardware or media access control (MAC)-level addresses, one for each
possible port in the system. For an explanation of the hardware addressing function, refer to the
section "MAC Address Allocator" in this chapter.

Jumpers

The hardware configuration register is a 50-pin jumper block located above the Flash memory card
port when viewing the RP in the orientation shown in Figure 1-8. By installing jumpers on specific
pins you can define system boot instructions, set broadcast addresses and console baud rates, instruct
the router to perform factory diagnostics at startup, and recover from a lost password.
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Before replacing an RP, back up the running configuration to a Trivial File Transfer