If you're using devstack, you may run:

~/devstack: ./rejoin_stack.sh

go to screen tab with "q-svc", press ctrl-c and then run previous command in that screen.

Hi Ritesh,

to add more context to Eugene's answer, devstack does not install in your system the init.d script, as it installs code from sources rather than from package.

You should be able to restart quantum with 'service quantum-server restart' when you install it from packages.

Check this for the latest: http://docs.openstack.org/trunk/openstack-network/admin/content/ch_install.html (http://docs.openstack.org/trunk/opens...)

or if you are using Folsom: http://docs.openstack.org/folsom/openstack-network/admin/content/ch_install.html (http://docs.openstack.org/folsom/open...)