This read-only Integer32 is described as the maximum total retry duration for this SA, with its fractional-second part held in the paired microseconds object. An admin reads this to know the outer bound on how long this specific SA will keep attempting retries before giving up entirely, which helps explain how quickly a stuck negotiation on this SA will finally time out. For example, an admin waiting on a dialup user's tunnel to establish would use this maximum retry duration to estimate how long to wait before concluding the negotiation has failed.