Publisher API configuration dialog 1

The Publisher API multicasts messages to subscribers over one or more data channels. Four channels are recommended for a system that handles 300,000 messages per second. Use this dialog to identify the data channels.

**Table B-6: Publisher API dialog 1 configuration options**
Field name	Default value	Description
Channel Name	Custom Channel 1	Identifies the data channel that Publisher API uses to send messages to a subscriber. Although the installer assigns Custom Channel 1 to the first data channel by default, you can use any value as the channel name. You must supply a Channel Name to any subsequent data channels you define. Assigning unique names to channels can help you track each one more easily in the event that an error is logged.
Local Interface	None	Identifies the IP address of the network interface to which this channel will be bound. This allows a user to bind various data channels to separate network interfaces to enhance performance. If you plan to install all publishers and subscribers on the same server, you must configure the Local Interface to use the loopback interface (127.0.0.1). If you install publishers and subscribers on different servers, use the local machine address of the secondary Ethernet network card installed by the system administrator.
Broadcast IP Address	224.0.2.0	Identifies the Class D multicast IP address that the Publisher API uses to multicast messages to subscribers. This value should match the multicast address that the subscribers use to receive messages. Although the installer assigns 224.0.2.0 as a default multicast IP address to all Broadcast IP address fields, your Network Administrator can choose an alternate multicast address. All multicast IP addresses must range from 224.0.2.0 through 224.0.255.0.
Broadcast Port	3250	Identifies the local port on which this data channel will operate. Publishers can multicast messages to a subscriber on multiple data channels that share the same local interface and Broadcast IP Address, but the Broadcast Port must be unique to that data channel.

Table B-6: Publisher API dialog 1 configuration options

Field name

Default value

Description

Channel Name

Custom Channel 1

Identifies the data channel that Publisher API uses to send messages to a subscriber. Although the installer assigns Custom Channel 1 to the first data channel by default, you can use any value as the channel name.

You must supply a Channel Name to any subsequent data channels you define. Assigning unique names to channels can help you track each one more easily in the event that an error is logged.

Local Interface

None

Identifies the IP address of the network interface to which this channel will be bound. This allows a user to bind various data channels to separate network interfaces to enhance performance.

If you plan to install all publishers and subscribers on the same server, you must configure the Local Interface to use the loopback interface (127.0.0.1).
If you install publishers and subscribers on different servers, use the local machine address of the secondary Ethernet network card installed by the system administrator.

Broadcast IP Address

224.0.2.0

Identifies the Class D multicast IP address that the Publisher API uses to multicast messages to subscribers. This value should match the multicast address that the subscribers use to receive messages.

Although the installer assigns 224.0.2.0 as a default multicast IP address to all Broadcast IP address fields, your Network Administrator can choose an alternate multicast address. All multicast IP addresses must range from 224.0.2.0 through 224.0.255.0.

Broadcast Port

3250

Identifies the local port on which this data channel will operate.

Publishers can multicast messages to a subscriber on multiple data channels that share the same local interface and Broadcast IP Address, but the Broadcast Port must be unique to that data channel.

Note After you define the first channel, do one of the following:

Click Next with a checkmark in the I would like to define another data channel box to display a blank data channel dialog.
Remove the checkmark in the I would like to define another data channel box, and click Next to display the next set of configuration options.