Advanced Operations › Network Configuration Details › Network Addresses › Public Network

Public Network

On the public network CA 3Tera AppLogic grids use the following IP addresses (all as assigned by the grid administrator):

• Server public IP addresses - The server public IP addresses are automatically assigned by the Backbone Fabric Controller during the discovery process. These addresses are used for obtaining the time from external time source (NTP) and for troubleshooting grid problems (may be disabled altogether in a future release of CA 3Tera AppLogic)
• Application IP addresses - This is a range of freely available public IP addresses that can be used by applications running on the grid. If these applications running on the grid are to be accessible outside of the Ethernet segment to which the servers' public NICs are connected, these addresses should be in the range that is routed into the public NICs' segment. All public NICs in a grid should be on the same Ethernet segment, as appliances can be moved from server to server (and servers from the same backbone may be added and removed from a grid). These addresses must be available and designated for use only by applications on the grid. The application addresses don't need to be a proper subnet; however, it is recommended that they are a contiguous range in a single subnet.
• controller IP address. An IP address through which grid users access the CA 3Tera AppLogic grid's user interface. The address is assigned by the grid administrator during grid install and is automatically configured by CA 3Tera AppLogic during grid startup. Same as for the application IP addresses, if the controller is to be accessed outside the 'public' Ethernet segment, this IP address must be routed to that segment from outside. The address must not be in use prior to creating the grid. Note: Usually the grid controller public IP address is in the same subnet as the application IP addresses.

CA 3Tera AppLogic is also configured with an IP gateway and one or more DNS server IP addresses.

The controller's public IP addresses is assigned during grid install and cannot be changed without destroying the grid first.