Save DHCP table inside of the external flash in a 2801 router.

[Marcos Martinez Garcia]

Hello everybody,

I want to know how to storage the DHCP IP table in a external flash of a router. This is because the router is switched off and switched on everyday but I want that it remembers which MAC is associated with which IP when it starts again and avoid IP duplicate problems. The command "lease" doesn't seem useful here.

I was looking for some info in Cisco docummentation, but finally I found nothing...

Someone knows how to do that or have another idea which help me to solve this issue?

Thank you very much in advance!

Best regards,

Marcos.

[cadet alain · Accepted solution]

Hi,

ip dhcp database  flash:/xxxx  is the command you're looking for, you could also disable conflict logging in case you were not saving the database with no ip dhcp conflict logging command.

Regards.

Alain

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[Marcos Martinez Garcia]

Thank you so much Alain!

What do you mean with disable coflict logging? I think that is just information for troubleshooting. How can disable it help me?

Thank you again in advance. Your information is very appreciated.

Marcos.

[Marcos Martinez Garcia]

Almost forguet!

The command ip dhcp database  flash:/xxxx will save the DHCP table into the internal flash or intro the external flash (the extraible card)??

Thanks!

[cadet alain · Accepted solution]

Hi,

flash:/ is internal but replace by the external flash path for your need.

Concerning conflict logging: if you don't save the binding database it's best to disable conflict logging with: no ip dhcp conflict logging global configuration command to alleviate the problems when the router reboots.

Regards.

Alain

Don't forget to rate helpful posts.