Sets the minimum interval, in milliseconds (note: this DC implementation changed the unit from the base standard's seconds to milliseconds, default 5), between retransmissions of the same unacknowledged LSP at this level — distinct from isisCircLevelLSPThrottle, which controls the rate of sending different back-to-back LSPs. An admin tunes this to control how aggressively the router re-floods a specific LSP that hasn't yet been acknowledged by a neighbor on this circuit.