[question] new bind option "max-recursion-depth"

Barry Margolin barmar at alum.mit.edu
Wed Dec 17 22:20:09 UTC 2014

In article <mailman.1299.1418839938.26362.bind-users at lists.isc.org>,
 Evan Hunt <each at isc.org> wrote:

> On Wed, Dec 17, 2014 at 03:32:30AM -0500, Barry Margolin wrote:
> > Didn't someone post a problem they were having a few days ago because of 
> > a chain of Akamai CNAMEs that exceeded the limit?
> Recursion depth is about how many layers deep you have to go to
> resolve an NS address.  CNAME chains have different limits on them.

But each CNAME is in a different domain, and their nameservers were in 
yet other domains. So while resolving the CNAME chain, you also have to 
perform several levels of recursion.

Does the max-recursion-depth limit apply to all of these combined, or 
does each step in the chain start at zero?

Barry Margolin
Arlington, MA

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