Cisco Catalyst 4000 Manuale - Pagina 11

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Memory Requirements in the Cisco 4000 Series

Each module in the Cisco 4000 series can change memory configurations to accommodate

internetworking demands. The memory requirements are affected by the following factors:

•

The number of Cisco IOS software images a system stores can be increase by adding

Flash memory.

•

Network expansion, the use of additional protocols or Cisco IOS services, or newer

Cisco IOS releases may require additional main memory

•

I/O performance or more physical or virtual interfaces may require additional shared

memory.

Shared Memory Requirements

The standard configuration for shared memory is 4 MB for the Cisco 4000 series. 4 MB of

memory is enough for most configurations with fewer than 24 physical or virtual interfaces.

Routers with multiple ISDN BRI network processor modules or with 24 or more physical

and virtual interfaces require 8 to 16 MB of shared memory.

Note

affect main or flash memory requirements.

The types and numbers of network processor modules installed in a system does not

Overview of the Cisco 4000 Series Routers 1-11

Memory Systems