Create a floating CommServe name before setting up the production and standby CommServe hosts for a CommServe Failover configuration.
This can done by creating a DNS A record in the DNS server with a virtual host name and IP address of the active CommServe host.
Use the following step to create an A Record in Windows 2008 Server. For Windows 2012 Server, refer to Creating a DNS A Record Using the PowerShell Commands.
Before You Begin
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Login to host computer as member of the Administrators group
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Have the host name and IP address ready
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Use an account with full permissions to create and delete A records in the DNS Server for the floating CommServe name.
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If you have multiple NICs, determine the IP address that must be used for populating the Floating CommServe name.
Create a DNS A Record
Use the following command to add an A record on the Domain Name Server:
dnscmd.exe ServerName /RecordAdd ZoneName ComputerName TTL A IPAddress /f
Where:
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ServerName - Specifies the DNS server that you are planning to manage.
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ZoneName - Specifies the zone in which the record will reside.
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ComputerName - Specifies the name of the computer that needs to be created in the DNS server with the specified IP address.
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TTL - Specifies the amount of Time-To-Live (TTL) for the resource record. Default value of TTL is 10 seconds.
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A - Specifies the resource record type of the record you are adding.
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IPAddress - The IP Address of the host /f Executes the command without asking for confirmation.
Example
Add A record for floating CommServe name
dnscmd.exe dnshost.mydomain.mycompany.com /RecordAdd mydomain.mycompany.com prodcs 10 A 100.10.15.52
Add A record for the physical CommServe host name (optional)
dnscmd.exe dnshost.mydomain.mycompany.com /RecordAdd mydomain.mycompany.com prodcs01 10 A 100.10.15.52
Delete a DNS A Record
Use the following command to delete an A record on the Domain Name Server:
dnscmd.exe ServerName /RecordDelete ZoneName ComputerName A IPAddress /f
where,
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ServerName - Specifies the DNS server that you are planning to manage.
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ZoneName - Specifies the zone in which the record resides.
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ComputerName - Specifies the name of the computer that needs to be deleted in the DNS server with the specified IP address
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A - Specifies the resource record type of the record you are adding
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IPAddress - The IP Address of the host
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/f - Executes the command without asking for confirmation.
Example
dnscmd.exe dnshost.mydomain.mycompany.com /RecordDelete mydomain.mycompany.com prodcs A 100.10.15.52 /f
What To Do Next
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To make sure that the CommServe hosts use the new DNS record added above, run the ipconfig/flushdns command from the command line.
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Make sure that the floating CommServe name is resolvable from both the production and standby CommServe hosts, using the "ping" or any other name resolution commands / tools.
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If you have multiple NICs, make sure that the Floating CommServe name resolves to the correct IP.