Dynamic DNS Update question

Hello,

We can see that the SAS Linux client dynamicallyl registers its A record in AD DNS servers when it first joins the domain.  Does it also periodically refresh this DNS record so that if scavenging was setup on the AD DNS servers it wouldn't be affected as record would continuously refresh the tmestamp ?  If so, is there a setting that controls how often it will refresh the DNS record ?  I believe the windows clients do the refresh every 24 hours by default.  Is it the same process here or do we need to do anything additional with the dnsupdate utility to keep the record alive ?  We want to avoid the records being considered stale when scavenging takes place.