Concise Guide to DNS and BIND, The

The Limits of BIND

BIND does not have many implementation limits, or at least not limits you easily bump into. Most of these limits are not explicitly documented, and for that reason, I might easily have missed or misinterpreted some in spite of my best efforts. These are some of the limits in BIND 8.2.2P5:

• A slave zone can have only 16 masters.

• BIND will try only up to 16 NS records when making queries about a zone.

• The maximum concurrent inbound zone transfers is 20.

• BIND handles only 65,536 zones.

• BIND will issue only 20 queries to recursively resolve a name.

• The maximum SOA refresh interval is 2,419,200 seconds, or 4 weeks.

• The maximum retry interval is 1,209,600 seconds, or 2 weeks.

• Only 20 additional records in a query answer are handled.

• Domain ...