def configLicenseServerDetails(self, licenseServer=None, licenseMode=None, licenseTier=None):
        """
        Description
           Configure license server details: license server IP, license mode and license tier.

        Parameters
           licenseServer: (str): License server IP address(s) in a list.
           licenseMode: (str): subscription | perpetual | mixed
           licenseTier: (str): tier1 | tier2 | tier3 ...

        Syntax
           PATCH: /api/v1/sessions/{id}/ixnetwork/globals/licensing
        """
        # Each new session requires configuring the new session's license details.
        data = {}
        if licenseServer:
            data.update({'licensingServers': licenseServer})
        if licenseMode:
            data.update({'mode': licenseMode})
        if licenseTier:
            data.update({'tier': licenseTier})

        response = self.patch(self.sessionUrl+'/globals/licensing', data=data)
        self.showLicenseDetails()