Cache not expiring...

[Mark.Andrews at nominum.com]

> 
> 
> Hey guys.
> 
> While I've never gotten a complaint from my users, I have a reseller
> who keeps moving hosts and ips on a separate network from mine.  Then
> since his customers use my dial-up and DNS, they are not seeing the DNS
> changes right away.  In fact, sometimes it takes days... usually until
> I rehup my named for a DNS change on my network.  His complain is that
> our DNS returns old cached data for days after other DNS server's (Uu.net,
> Digex, MSN, etc.) serve up the fresh data.

	It sounds like you are secondarying the zone if HUP fixes
	things.  HUPing a nameserver does not clear the cache.  It
	does however cause a refresh check to occur.

	But as always this is supposition as you have failed to
	tell us the names of the zones and servers involved.

> 
> My bind is 8.2.2-P5 and I don't have the option "cleaning-interval" set in 
> my config.  Reading the Grasshopper book, it states that versions of Bind
> after 8 will default to a cleaning interval of 60 minutes, at which time
> records over thier TTL will be discarded... He claims his TTL is
> one day, and judging by the behavior of other servers, I tend to believe 
> him... Why is my name server not discarded stale cache data?
> 
> Thanx in advance.
> 
> 					----Steve
> Stephen Amadei
> Dandy.net CTO
> Atlantic City, NJ
> 
> 
> 
> 
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com