dhcp failover reversing over sites [ Edited ]

[#1]

Hello 

We have multiple sites in different cities worldwide.
Each site have local customers.
IE:
site1 - city1 - country1
site2 - city2 - country1
site3 - city3 - country2
site4 - city4 - country2

Is there a way to create dhcp-failovers as follows:
primary site1 secondary site2
primary site2 secondary site1
primary site3 secondary site4
primary site4 secondary site3

What i want to achieve is to create redundancy but to keep connection distances/response times as low as possible as some of these sites are 1000:s of km apart.

[#2]

With NIOS? Not quite like that. You create the following Failover Associations

• FO-site1-site2 and then use that Failover Association for both Site 1 and Site 2.
• FO-site3-site4 and then use that Failover Association for both Site 3 and Site 4.

All DHCP Relays in site 1 and site 2 point at the DHCP servers in both Site 1 and Site 2. The servers respond based on a hash of the requesting MAC address. This provides resiliancy across sites (the higher the latency between sites, the worse the performance of DHCP in terms of LPS)