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Migrating from Solaris 9 Enterprise Edition on Sun Fire V440 with BIND 8.3.3

to Solaris 10 Enterprise Edition on Dell PowerEdge R900 with BIND 9.3.5-P1

organization may have particular security concerns or contractual

obligations that will prevent such a consolidation.

Differences between BIND 8 and BIND 9

We list below of some of the more significant differences between

BIND 8 and BIND 9. You can find a fuller discussion in the file

/usr/share/doc/bind/migration.txt, which is part of the Solaris 10

installation.

Configuration file compatibility

• Options. BIND 9 implements most, but not all, of the

options in BIND 8. The migration.txt file gives a complete

list of implemented options. Should your named.conf file

contain an unimplemented option, or an option with a

different default value, BIND 9 will log a warning.

• Configuration file errors. BIND 9 will not start if it detects

an error in named.conf. Under certain circumstances, earlier

versions of BIND would start, and the DNS server would be

running with incomplete or erroneous information.

• Logging changes. The BIND 9 logging categories differ

from the BIND 8 logging categories, and the logging

statement takes effect later in the initialization. If you have

customized the logging in your current installation, you may

need to modify your logging statements.

Zone file compatibility

• Stricter time to live (TTL) checking. Versions of BIND

from 8.2 up to 9 would use the default value of Start of

Authority (SOA) Minimum Time to Live (MINTTL) if you did

not specify the TTL. (Versions before 8.2 did not support the

TTL statement at all.) However, all versions of BIND 9

comply with the relevant RFCs on this subject. It will use

the value of the last $TTL statement, or display an error if

there are none.

• Miscellaneous syntax changes. There are a number of

syntax changes in BIND 9:

o BIND 9 does not allow dots in SOA serial numbers.

They must be integers.

o Unbalanced quotes may cause errors because BIND

9 will not assume the string ends at the end of the

line.

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