03-18-2003 03:46 PM - edited 03-02-2019 05:58 AM
I have enabled this feature, but not yet have begun to use it. I enabled this on my fasteth 0 interface and I am also in the process of migrating this network to a new IP addressing scheme. To ensure low impact to production I set my current router IP address as SECONDARY address of the fasteth 0 interface.
Will the IP Helper-Address change the bcst address to the primary IP address of the fasteth 0 interface? If so, I do not believe my DHCP server will recognize which subnet this dhcp req packet originated from to select the appropriate DHCP IP Pool. Is this true?
Solved! Go to Solution.
03-19-2003 07:38 AM
To enable DHCP relay on secondary subnets, use the global configuration command:
ip dhcp smart-relay
This will allow the router to try the all subnets during DHCP offer negotiations with the server.
HTH
Regards,
Mustafa
03-18-2003 04:20 PM
Your primary address needs to be in the same subnet as your DHCP pool. Otherwise as you have indicated the DHCP server won't issue the addresses.
03-19-2003 07:38 AM
To enable DHCP relay on secondary subnets, use the global configuration command:
ip dhcp smart-relay
This will allow the router to try the all subnets during DHCP offer negotiations with the server.
HTH
Regards,
Mustafa
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