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Writing DHCP database to flash

Level 1
Level 1

We have a couple of Cisco 3750 switches, IOS version 12.2(25)SEC, that are currently running DHCP server and storing the database on a Windows FTP server.

Is there a way to store that DHCP database locally in flash? It looks like

"IP DHCP DATABASE url..." command only allows tftp, rcp or ftp.

Even the "IP DHCP SNOOPING DATABASE FLASH:...." didnt seem to work.

Any pointers provided would be greatly appreciated.

Thanks in advance.

2 Replies 2

Level 9
Level 9


Can you revert whether you are getting any error message after entering the command:

ip dhcp snooping database flash:file.txt ..

Have you verified the file generation in flash ??

The IOS code has the support to the command and its being metnioned out the release notes.


Thanks for replying.

I do not get any error after entering the command. The file is created in flash but bindings are lost when the switch reloads. To me, it looks like the bindings exist only in NVRAM and not written to flash.

We had a power outage recently and all switches came back online in about 4-5 minutes whereas it took Windows FTP server about 10 minutes to come online. In the mean time, switches were not able to access DHCP database and all IP addresses renewed were moved to CONFLICTS.

Thanks again.