Sets the maximum interval, in seconds, between regenerations of this router's own LSPs, defaulting to 900 seconds; it must be set higher than isisSysLevelMinLSPGenInt and should be at least 300 seconds below isisSysMaxAge so a refreshed LSP always arrives before the old one would expire. An admin tightens this interval on a network where faster LSP refresh is needed, while keeping the 300-second safety margin against isisSysMaxAge to avoid routes flapping from premature expiry.