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How do I write log of DHCP bindings from cisco 3750 switch to a TFTP server periodically?

Posted on 2007-11-19
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Last Modified: 2008-02-07
We had a known cisco software bug on 3750 switch where if you enable DHCP ping check before it gives out address it causes chaos if more than 50 devices ask for DHCP at once.

workaround is to disable the ping check - Done this.

Ok, but now, in the event of switch failure/reboot the DHCp will allocate addresses from the beginning of the range again, potentially causing a DHCP conflict.

I have heard there is the function to enable the switch(DHCP server) to write a bindings list to a TFTP server periodically, and in the event of a switch reboot, it checks for the binding list on start up before issuing any DHCP addresses.

How do I acvieve this?

Thanks
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Question by:mac326a
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Router(config)#ip dhcp database tftp://10.1.1.1/dhcp_filename

where: 10.1.1.1 is the tftp server ip address; make sure the tftp server software is running on the server and that the server is configured to receive files.
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