Here is a list of files that you need to edit when changing the IP address of an interface in Solaris 10.
/etc/hosts
/etc/hostname.interface-name
/etc/nodename
/etc/defaultrouter
/etc/resolv.conf
/etc/netmasks
Add the ip address and server name to the host file.
vi /etc/hosts
10.0.0.10 server-name
Select the interface you want, your server may have more than one network interfaces.
vi /etc/hostname.bge0
10.0.0.10 netmask 255.255.255.0
Change the node name
vi /etc/nodename
server-name
Add the gateway ip address
vi /etc/defaultrouter
10.0.0.1
Add the DNS servers ip addresses
vi /etc/resolv.conf
nameserver 168.20.0.10
nameserver 168.20.10.22
Add the network address
vi /etc/netmasks
10.0.0.0 255.255.255.0
Now reboot the server.