Cisco 7100 Series Manuel d'installation - Page 12

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Replacing SDRAM DIMMs

Figure 8

Replacing SDRAM DIMMs

This section describes how to replace the SDRAM DIMMs in the router. You might need to upgrade

the SDRAM DIMMs for the following reasons:

•

The network processor card contains three sockets for SDRAM DIMMs (see Figure 9):

•

12 Installing Field-Replaceable Units in Cisco 7100 Series VPN Routers

Removing the Chassis Cover

Chassis cover

Front panel

You have upgraded to a new Cisco IOS feature set or release that requires more memory.

You are using very large routing tables or many protocols (for example, when the router is set up

as a connection device between large external networks and your internal network).

Socket DIMM 1 and socket DIMM 2 hold system and packet memory SDRAM DIMMs. System

memory is used by the CPU to store the operating configuration, routing tables, caches, and

queues. The DIMMs can be 64 MB or 128 MB, and the capacity of the DIMM in slot DIMM 1

must be greater than or equal to the capacity of the DIMM in slot DIMM 2.

Socket DIMM 0 holds a packet memory SDRAM DIMM. Packet memory is used to store

incoming and outgoing packets. This DIMM is fixed at 64 MB.

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Chassis bottom