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Your network conguration might have other domains, computers, and record types
that are impacted by a server’s IP address change (SRV records, for instance). These
other records should be examined thoroughly after any change to a server’s IP address.
If the server is a DNS server, use the tool changeip to change the NS, A, and PTR
records. Changing a DNS server’s IP address directly impacts any client computer
that uses the DNS server. For example, the DNS server’s IP address could be provided
to DHCP clients automatically, so all DHCP clients rely on the DNS server’s correct IP
address. All DNS names for all domains hosted by the DNS server must be examined.
Because of DNS caching, many clients might not respond to changes in the DNS
system as quickly as needed. To expedite DNS server setting propagation, update all
wireless access points, DHCP servers, manually congured IP address clients, and DHCP
address clients by restarting them or renewing their DHCP leases.
In summary, clients that refer to the DNS server’s IP address for name resolution need
to be updated to use the new IP address.
Changing a server’s DNS name or domain impacts all other services that rely on the
server’s domain name resolving correctly in DNS. The aected services include:
Directory service Â
Kerberos service and Kerberos Realm names Â
WINS server names Â
DHCP supplied search domains Â
DHCP
Changing the IP address of a DHCP server might invalidate all subnets and static IP
addresses handled by the server. Additionally, the change in IP address might result in
unreachable search domain names, WINS server names, or LDAP URLs. Examine these
settings, if needed.
Many clients might not respond to the changes in the DHCP system immediately.
After a DHCP server change, update all wireless access points, manually congured IP
address clients, and DHCP address clients by restarting them or renewing their DHCP
leases.
Changing the domain name of a DHCP server could also make obsolete the search
domain names, WINS server names, or LDAP URLs. Changing the only hostname
segment to a fully qualied domain name might not have the same eect.
Directory Service and Kerberos
Changing the IP address of an Open Directory Server might invalidate the data records
themselves (computer records, or user home directories). None of the contents of the
records are altered when you change the IP address, only the conguration.
13 4 Chapter 7 Ongoing System Management