A end user want to have a bandwidth guarantee with some special address.The route from the user to it's destination will through three routers.routerA-routerB-routerC.If I set a higher precedence on routerA by dhcp and have no qos setting on the other two routers,will the other two router see the high precedence of the special traffic?And I want to the diffrence about set a parameter of precedence(critical,0-7) and dhcp?thanks