How a router decides from which DHCP pool to return address

From: Popgeorgiev Nikolay (nikolay.popgeorgiev@siemens.com)
Date: Mon May 15 2006 - 04:12:40 ART

Dear group,
 
At first I thought that the router returns an address depending on its interface addresses, but what if it returns an address which doesn't have anything in common with its interfaces.
 
 
For example
 
 
 
 
R5(ip address dhcp)--R1(dhcp-server) ---R2(helper address)---R3(ip address dhcp)
 
 
I have two pools in R1 doesn't matter their ips. From which pool R3 and R5 will take their addresses
 
Thanks
Nick

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