I am trying to setup Hot standby DHCP server2012 (two DHCP server with multi-scope)
I am using two servers with fail-over DHCP configuration. (Hot standby) with IP address
192.168.0.1 for server 1 and 192.168.0.2 for server 2
In the Cisco 3750 switch I created 3 vlans
Vlan 10 with an IP address 192.168.0.3
Vlan 20 with an IP address 192.168.1.1
Vlan 30 with an IP address 192.168.2.1
In the configuration I added IP helper-address command to refer DHCP servers
Under each Vlan interface I added two IP helper address
Under Vlan 10
ip helper-address 192.168.0.1
ip helper-address 192.168.0.2
And so on for Vlan 20 and Vlan 30
The computers work fine and got IP address and getaway for each Vlan. However, I tried to test the fail-over DHCP and I shut down the DHCP server with an IP address 192.168.0.1 and waited to get computer an IP from second DHCP server but it's not working. I Release and renew IP and nothing changed.
Is there any missing part of my configuration?