RTNETLINK answers: File exists - Unable to bring bond0 up

Hi

After changing IP address on the server i restarted network service and it doesnt come up .

~]# systemctl start network
Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
[ ~]# jouralctl -xe
bash: jouralctl: command not found...
[ ~]# journalctl -xe
Jul 08 12:09:15 network[18745]: Bringing up interface bond0
Jul 08 12:09:15 tnetwork[18745]: [FAILED]
Jul 08 12:09:15 network[18745]: RTNETLINK answers: File exi
Jul 08 12:09:15 network[18745]: RTNETLINK answers: File exi
Jul 08 12:09:15 network[18745]: RTNETLINK answers: File exi

Jul 08 12:09:15 t systemd[1]: network.service: control proces
Jul 08 12:09:15 te systemd[1]: Failed to start LSB: Bring up/d
-- Subject: Unit network.service has failed
-- Defined-By: systemd

-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

-- Unit network.service has failed.

-- The result is failed.

Jul 08 12:09:15 systemd[1]: Unit network.service entered fa
Jul 08 12:09:15 systemd[1]: network.service failed.
Jul 08 12:09:15 polkitd[3077]: Unregistered Authentication
lines 1456-1478/1478 (END)