mpls ldp neighbor 192.x.x.1 password 7
This command configures a passowrd with the LDP neighbor. The number 7 indicates that the passord that will follow will be encrypted with type 7.
mpls label protocol ldp
The global mpls label protocol ldp command sets the default label distribution protocol for all interfaces to be LDP.
issu config-sync policy
When two different versions of Cisco IOS images are involved, there is a possibility that the command sets supported by two images might differ. If any of those mismatched commands are executed on the active supervisor engine, the standby supervisor engine might not recognize those commands. This causes a Config Mismatch Condition
The no form of the command removes the defined policy
HTH
Narayan
