The no form of the mpls command typically removes an MPLS instance and all associated information. However, MPLS must be disabled (shut down) and all SDP bindings to LSPs removed before an MPLS instance can be deleted. Once MPLS is shut down, the no mpls command deletes the protocol instance and removes all configuration parameters for the MPLS instance.
If MPLS is not shut down first, when the no mpls command is executed, a warning message on the console indicates that MPLS is still administratively up.
To delete the MPLS instance:
Disable the MPLS instance using the shutdown command.
Remove the MPLS instance from the router using the no mpls command.
config>router# no mpls