This object identifies the module that manages the grouping of vlans in this virtual context. mstp(1) - MSTP(Multiple Spanning Tree Protocol) module manages the grouping of vlans. In this case, MSTI(MSTP instance Id) identifies the group (or vlan list). If a MSTI is mapped to a Protection Group, then that Protection group will protect the list of vlan mapped to that MSTI. Administrator should make sure that MSTP module is started and enabled, if this object is set to mstp(1). elps(2) - ELPS module manages the grouping of vlans. If this value is set, In this case ELPS instance identifies the group. The group will be created for the fsElpsPgConfigWorkingInstanceId and fsElpsPgConfigProtectionInstanceId and the VLAN mapping will be done for the objects fsElpsPgConfigWorkingServiceValue and fsElpsPgConfigprotectionServiceValue or fsElpsPgServiceListValue based on the fsElpsPgConfigType when the fsElpsPgConfigRowStatus is Active