United States
Q
What are the default RAM and flash memory specifications on a Cisco 2900 series router?
A
A Cisco 2900 series router ships with 256 MB of DDR2 DRAM and 128 MB of internal flash memory by default.
Q
How do I check the installed DRAM and flash memory on my Cisco 2900 router?
A
Use the CLI commands show version to view DRAM and show flash: to list flash capacity and contents.
Q
What is the maximum DRAM capacity supported by the Cisco 2900 series?
A
The Cisco 2900 series supports up to 2 GB of DDR2 DRAM for enhanced routing, security, and voice services.
Q
What flash memory capacities are supported on the Cisco 2900 routers?
A
Cisco 2900 routers support up to 512 MB of internal flash and an optional CompactFlash card slot of up to 32 GB.
Q
Which types of memory modules are compatible with the Cisco 2900 series?
A
Cisco 2900 routers require Cisco-qualified DDR2 DRAM and flash modules to ensure full compatibility and warranty support.
Q
Can I use third-party memory modules in my Cisco 2900 router?
A
Cisco strongly recommends using genuine Cisco memory modules to maintain stability, performance, and warranty compliance.
Q
How do I upgrade DRAM on a Cisco 2900 series router?
A
Power off the router, remove the chassis cover, install the Cisco DDR2 DRAM module into the DRAM slot, replace the cover, and power on.
Q
How can I upgrade or replace the flash memory in a 2900 router?
A
Shut down the router, open the flash compartment, swap the flash chip or install a CompactFlash card, then reboot and verify with show flash:.
Q
What is NVRAM on a Cisco 2900 router used for?
A
NVRAM stores the router’s startup configuration file, retaining it across reboots and power cycles.
Q
How do I clear DRAM and flash memory settings on a Cisco 2900 router?
A
Use erase startup-config to clear NVRAM, then format flash: to erase internal flash contents.
Q
How do I recover a corrupted flash image on a Cisco 2900 series router?
A
Enter ROMMON mode, configure IP and TFTP parameters, then use the tftpdnld command to download a new IOS image.
Q
What file systems are supported by flash memory on the Cisco 2900 series?
A
Internal flash uses the Cisco proprietary file system, while external CompactFlash supports FAT16 and FAT32 formats.
Q
How does DRAM capacity affect performance on a Cisco 2900 router?
A
Higher DRAM enables larger routing tables, more concurrent sessions, and advanced feature sets without memory-related slowdowns.
Q
What factors should I consider when selecting a memory upgrade for my Cisco 2900 router?
A
Evaluate required IOS feature sets, expected routing table size, voice or security workloads, and ensure Cisco compatibility.
Q
Can I hot-swap DRAM or flash modules in the Cisco 2900 series?
A
No, hot-swapping is not supported. Always power down the router before installing or replacing memory modules.
Q
How do I verify that a newly installed memory upgrade is recognized by my Cisco 2900 router?
A
After reboot, run show version to confirm DRAM and show flash: to verify flash capacity and module details.
