Dropping a user-defined logical server results in dropping all node membership definitions.
Each login policy that has an explicit assignment to the logical server drops the logical server assignment from the login policy. However, if the logical server is the only one that is assigned to the login policy, then the logical server assignment for the login policy is set to NONE.
Existing connections to a logical server remain unaffected when it is dropped. Sybase recommends that you ensure that there are no active connections for a logical server when it is being dropped.