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- Changing the name or IP address of a resource record on the Microsoft server effectively deletes the original resource record and creates a new record with the current information. During the synchronization, the Grid member also deletes the original record, including its associated properties, such as its extensible attributes and administrative permissions, and creates a new record.
For example, as shown in Figure 35.1, the A record for printer1.corpxyz.com is on both the Microsoft and Infoblox Grid member. On the Grid, the A record has extensible attributes and a comment. A Microsoft server admin changes the IP address of the A1 resource record from 10.1.1.2 to 10.1.1.3. On the Microsoft server, this is equivalent to deleting the A1 resource record with the IP address 10.1.1.2 and then adding a new A1 resource record with the IP address 10.1.1.3. When the data is synchronized, the Grid member deletes the original record with its extensible attributes and comments and creates a new A record with IP address 10.1.1.3.
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- If a Microsoft server admin changes the IP address of a resource record and a Grid Manager admin changes the IP address of the same resource record, they are effectively deleting the record and each creating a new one.
For example, as shown in Figure 35.2, a Microsoft server admin changes the IP address of the A resource record for printer1.corpxyz.com from 10.1.1.2 to 10.1.1.3, and a Grid Manager admin changes the IP address of the same resource record to 10.1.1.4. When the data is synchronized, the Grid member deletes the A1 resource record with IP address 10.1.1.2 and creates an A resource record with IP address 10.1.1.3 and another A1 resource record with IP address 10.1.1.4.
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When a parent zone delegates a subdomain to one or more name servers, Infoblox DNS servers require the delegation name servers to also be authoritative for the subzone. Microsoft servers do not; they allow the delegation servers of a subzone to be different from its authoritative servers. Infoblox DNS servers support this configuration only if the primary server of the parent zone is a Microsoft server. This configuration is retained when delegations are synchronized from Microsoft servers to the Grid.
For example, as shown in Figure 35.3, on a Microsoft server, corpxyz.com delegates sales.corpxyz.com to the name server ns1.corpxyz.com; but the authoritative server of sales.corpxyz.com is 2k3r264-2.infoblox.com.
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Figure 35.4 shows that after corpxyz.com and its subzone are synchronized to the Grid, corpxyz.com contains an NS record for sales.corpxyz.com and an A record for the delegation name server ns1.corpxyz.com. The MS Delegation Addresses column displays the IP address of the delegation server of the subzone sales.corpxyz.com.
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After the synchronization, you can add name servers for the delegation as follows:
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NIOS adds an NS record for the new delegation server and synchronizes this update to the Microsoft server. In
Figure 35.5, a new delegation server, ns2.corpxyz.com, was added.
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When you navigate to the Name Servers tab of sales.corpxyz.com to view the authoritative name servers for the subzone, note that as shown in Figure 35.6, the table displays 2k8r264-2.infoblox.com as the authoritative server for the subzone. The Parent Delegation column indicates if the FQDN and IP address of the authoritative name server for the zone matches the FQDN and IP address in the delegation zone's NS record. In the example, the authoritative name server 2k8r264-2.infoblox.com is different from the delegation name servers (ns1.corpxyz.com and ns2.corpxyz.com), so the column displays No.
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Note though that because Infoblox DNS servers require the delegation servers to also be authoritative for the subzone, if you add another authoritative name server to the subzone from Grid Manager, NIOS also adds it as a delegation server in the parent zone. For example, as shown in Figure 35.7, when an admin adds the name server ns-100.corpxyz.com as an external secondary server for sales.corpxyz.com, NIOS automatically adds it as a delegation server by adding an NS record for it in the parent zone.
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