'Check all input params'

def check_params(self):

    if (self.vrf == '_public_'):
        self.module.fail_json(msg='Error:    The    vrf    name    _public_    is    reserved.')
    if ((len(self.vrf) < 1) or (len(self.vrf) > 31)):
        self.module.fail_json(msg='Error:    The    vrf    name    length    must    between    1    and    242.')
    if self.description:
        if ((len(self.description) < 1) or (len(self.description) > 242)):
            self.module.fail_json(msg='Error:    The    vrf    description    length    must    between    1    and    242.')
