Yes, neighbour (i.e. pc) link are required at 10mb that why i am using (show inerterface interface-name speed) .When i am putting up this command then physical as well as logical link are up in rootuer but communication between pc and router goes down.
I have keep the router as autonegotiation as well ans no-autonegotiaon
If you are required to form a physical link at 10Mbs then you must hard code the PC side to use 10Mbs as well. Your connection is dropping because one side (PC) is set to auto and the other (router) is fixed.
The whole question and premise is still suspect to me and I think you are asking about rate limiting as adwivedi pointed out.