IF you not upgrading yes
If you upgrading no... you need the server address
If you doing it via console which is what you will need to do you need to add this entry also
setenv serverip 172.16.3.221
If i have to configure it manually i put both...
A example of how it should look like all the config
setenv ipaddr 172.16.3.223
setenv netmask 255.255.255.0
setenv gatewayip 172.16.3.1
setenv serverip 172.16.3.221
setenv master 172.16.3.221
Now if you are for any change using DHCP which i guess you are using... on the DNS server put a record of aruba-master on it and put the ip address of the master controller and he wil get the master ip address and the server ip addresss automatically unless you did hardcoded it.