2. Will there be any impact while changin the IP address of CCM if so what are those ?
Yes. CUCM is a real time application. So, when you change the IP address, any existing conversation with other CUCM nodes, voicemail systems, application servers, phones, voice gateways, etc. is interrupted and needs to be re-established. Also, when you change the IP address of a node in the cluster, you need to reboot all other nodes.
3. Does any services or application associated or binded with the IP address of CCM ?
On the CUCM system itself? Yes, all of the services are bound to the IP address. This is why you need to reboot a CUCM node after changing the IP address. Other CUCM nodes are affected as well. That is why you need to reload them. Outside of the cluster, it depends on the application. For Unity, you need to modify UTIM. For CUC, you need to modify the telephony integration. For UCCX, you need to modify the JTAPI and AXL providers. There are other examples. Don't forget DHCP Option 150. This is usually an IP address.
4. Is there any pre-requistes for upgrading the CCM.
I am not sure where you are going with this, but I am sure the answer to this question is yes. You can look at compatibility information here:
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...