cname chain limit

[Evan Hunt]

On Fri, Jul 09, 2010 at 03:08:20PM +0530, rams wrote:
> What is the cname chains limit ?

BIND will chase CNAME targets up to 16 times, then stop.  It's a
loop-prevention method:  if you have a.example.com pointing to
b.example.com which points back to a.example.com, BIND will try
16 times to find a useful target, then give up.

This has the side effect of cutting off a legitimate CNAME chain
at 17 records, but such a chain is pretty unlikely to occur in
nature.

-- 
Evan Hunt -- each at isc.org
Internet Systems Consortium, Inc.