On Wed, Dec 17, 2014 at 05:20:09PM -0500, Barry Margolin wrote: > 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?
It limits how deep the server will go at any one time. If looking up a name server requires looking up a second name server which requires looking up a third, they're each pushed on to a stack. Eventually (one hopes), you reach bottom and pop back up. If it turns out the name you asked for is a CNAME, then you start a new stack while you resolve the CNAME target. As long as the stack never exceeds seven layers of recursion, you're fine. -- Evan Hunt -- e...@isc.org Internet Systems Consortium, Inc. _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
