The maximum number of classes you can configure for a router—and, therefore, within a policy map—is 64.
it is included with class-default or excluding class-default mean 63 manual class + classdefault or 64 manual class + class-default Both for router and policy map if i configured a fastethernet interface with the available bandwidth of 75 Mbps available 75% And if suddenly that interface got duplex mismatch or speed mismatch and becomes 10 Mbps What will happen to the policy it will get removed from the interface or will allocate the bandwidth according to 75% rule. -- Thanks Kamlesh Sharma
