In case of a situation where you need to re-configure the existing IPs for SDP, then these steps can be done. This includes cleanup of existing setup and re-configuring the sdp.
1. Remove your IB listener, by the grid software
/u01/app/11.2.0.4/grid/bin/srvctl remove listener -l LISTENER_IB
2. Remove your vip resources, better to use force option "-f". This has to be done each node
/u01/app/11.2.0.4/grid/bin/srvctl remove vip -i ed05db01-ibvip -f
..
..
/u01/app/11.2.0.4/grid/bin/srvctl remove vip -i ed05db08-ibvip -f
3. Remove your network, better to use force option "-f"
/u01/app/11.2.0.4/grid/bin/srvctl remove network -k 2 -f
To redo the setup, you can follow this link from "Setup"
http://ajitsolomon.blogspot.com/p/end-to-end-configuration-of-sdp-listener.html