When creating reverse zones, Address Manager deploys classless IPv4 space as either a series of zones with classful networks or, as a single zone with a single network of classless space.
How Address Manager does this depends on the range of your block or network:
- Address Manager deploys blocks and networks falling within Class A and Class B as a series of Class B and Class C zones.
- Address Manager deploys blocks and networks falling within Class C as a single classless zone.
The following examples assumes that you have set the [start-ip]-[net-mask].[net].in-addr.arpa reverse zone name format.
Example 1: The 10/10 block contains a single 10/10 network. This is a
classless part of Class A. Address Manager deploys this as 64 separate
reverse zones for 64 separate Class B
networks:
// zone: 0.10.in-addr.arpa [master]
// zone: 1.10.in-addr.arpa [master]
// zone: 2.10.in-addr.arpa [master]
...
// zone: 61.10.in-addr.arpa [master]
// zone: 62.10.in-addr.arpa [master]
// zone: 63.10.in-addr.arpa [master]Example 2: The 172.20.128/19 block contains a single 172.20.128/19 network.
This is a classless part of Class B. Address Manager deploys this as 64
separate reverse zones for 64 separate Class C
networks:
// zone: 128.20.172.in-addr.arpa [master]
// zone: 129.20.172.in-addr.arpa [master]
// zone: 130.20.172.in-addr.arpa [master]
...
// zone: 157.20.172.in-addr.arpa [master]
// zone: 158.20.172.in-addr.arpa [master]
// zone: 159.20.172.in-addr.arpa [master]Example 3: The 192.168.1.0/26 block contains a single 192.168.1.0/26 network.
This is a classless part of Class C. Address Manager deploys this as a
single reverse
zone:
// zone: 0-26.1.168.192.in-addr.arpa [master]