The interval between successive State Refresh(S,G) messages originated by the local router. This object corresponds to the 'RefreshInterval' timer value defined in the PIM-DM specification (RFC3973). This field is only relevant for PIM-DM. It is ignored if either - 'dense' is clear for pimTmEntMode - pimTmEntMgmdProxy is 'true'. It is recommended that this value is set consistently throughout the network, and that in order to provide robustness to message loss, its value is much less than (for example, 3 or 3.5 times less than) pimInterfaceJoinPruneHoldtime and pimInterfaceAssertHoldtime for any interface on the local router. If this field is changed while the entity is active, for each (S,G) the change will only take effect after the next State Refresh(S,G) message is generated. If pimTmEntStateRefreshCapable is 'false', this value has no effect.