Change of network parameters

does changes in /etc/sysconfig/network/config requires reboot or restart some service on SLES?

You should use YaST to make the changes, this will then handle the
changes and restart services as necessary. I would imagine a network
restart would be required.

rcnetwork restart

Cheers Malcolm °¿° (Linux Counter #276890)
openSUSE 12.1 (x86_64) Kernel 3.1.10-1.9-desktop
up 0:03, 3 users, load average: 0.13, 0.23, 0.11
CPU Intel i5 CPU M520@2.40GHz | Intel Arrandale GPU