Cisco iOS Flash Memory recovery method

At present, the more popular solution flash memory fault, upgrade Flash method is to use TFTP method transmission. This article is based on the Cisco 2600 series for IT168 readers.

Step one: The device will enter the Rommon state after the delete flash memory command is executed.

Step two: We need to set the Rommon state to match our TFTP transfer environment. The specific orders are as follows:

Rommon 3 > Set

Ps1=rommon! >

ip_address=172.18.16.76 (Set the router's IP address, note that in practice we can only use port one to restore flash operations)

ip_subnet_mask=255.255.255.0 (Sets the subnet mask at one end of the router)

default_gateway=172.18.16.65 (set router's default gateway address)

tftp_server=172.18.16.2 (Set the address of the TFTP server used to transfer flash files)

TFTP_FILE=QUAKE/REL22_JAN_16/C2600-I-MZ (set file name of Flash file on TFTP server for easy downloading)

Step three: Then execute the tftpdnld command to start downloading.

Tip: The TFTP server must be established, so we should find a PC to configure the TFTP server IP address set above, and then download the Professional TFTP Server Setup tool from the Cisco website or find Third-party software to build it. The established method is very simple to select the directory to publish.

Using a routing switch device takes a long time through the sh Flash command, you'll find a lot of crashinfo files that take up a lot of flash space. When too many of these files cause flash storage space is full, it affects our future flash upgrade. So what's the Crashinfo file? How do we get rid of them?

Crashinfo files are the files that are left behind when the router restarts, and are the restart log files that we can delete them from. Use the Delete command specifically.