This object indicates the maximum interval of intelligent timer for OSPF to
perform the SPF calculation. When hwOspfv2SpfSchMaxIntvl is specified, you
need also specify hwOspfv2SpfSchStartIntvl and hwOspfv2SpfSchHoldIntvl, but
you cannot specify hwOspfv2SpfSchIntvlUnit or hwOspfv2SpfSchIntvlNumber.
Note that -1 is not a configurable value. Instead, by set the intelligent
timer to default value, it will get back to default configuration.