Cisco 2800 Series, Руководство пользователя

Страница: 230 / 266

2
Using CompactFlash Memory Cards
OL-5596-01
Requirements and Restrictions
Requirements and Restrictions
• Cisco 3800 series routers, Cisco 2800 series routers, and Cisco 1800 series routers do not support
internal flash memory. Because the system image can be stored only on a CF memory card, you need
to have a CF memory card installed to boot the system image.
•
We recommend that you erase (Class B) or format (Class C) new CF memory cards to initialize them
with either a Class B or Class C flash file system. This ensures proper formatting and enables the
ROM monitor to recognize and boot the flash memory.
• Only CF memory cards purchased from Cisco are supported on these platforms.
Cisco 1800 Series Routers and Cisco 2801 Routers
•
Support only the Class C flash file system.
•
Support only external CF memory cards.
• The CF memory card file system can be formatted on a Cisco 1800 series router or Cisco 2801
router. After the file system has been formatted, files on the CF memory card can be copied to or
from any PC that is equipped with a CF memory reader. If you use a PC to format the CF memory
card, use only the Microsoft 16-bit File Allocation Table (FAT16) file system.
Cisco 3800 Series Routers and Cisco 2800 Series Routers (Except for Cisco 2801 Routers)
•
Support Class B and Class C flash file systems.
• Support only external CF memory cards.
•
If you use a PC to format the CF memory cards, you can format the cards with the Microsoft 16-bit
File Allocation Table (FAT16), Microsoft 32-bit File Allocation Table (FAT32), or Microsoft
Windows NT file system (NTFS). Alternatively, you can format the CF memory card on the router.
Note
When formatted on the router, flash memory cards are formatted with the DOSFS file system, a
platform-independent industry-standard file system that is supported on all Cisco 3800 series routers,
Cisco 2800 series routers, and Cisco 1800 series routers.
Online Insertion and Removal
Online insertion and removal (OIR) is a feature that allows you to replace CF memory cards without
turning off the router and without affecting the operation of other interfaces. OIR of CF memory cards
provides uninterrupted operation to network users, maintains routing information, and ensures session
preservation.
Caution The external CF memory card should not be removed if the flash memory busy “CF” LED on the router
is ON, because this indicates that the software is accessing the CF memory card. Removing the CF
memory card may disrupt the network, because some software features use the CF memory card to store
tables and other important data.
For instructions on inserting, removing, and replacing the external CF memory card, see the hardware
installation documentation that came with your router.