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Configuring NetRef Multiple Primary Nodes (CTP Menu)

 

NetRef primary backup operation involves a new packet flow from the primary node to all the backup nodes. These timing packets are sent at a rate of approximately 4.5 packets per second.

Note

In this topic, the terms Primary and Backup refer to primary and client operations or nodes, respectively.

To configure network node reference with multiple primary nodes:

  1. From the Main Menu, select 2) Node Synchronization
  2. Select 6) NetRef to configure NetRef configuration parameters.Note

    You can select 1) 1st Priority, Reference 0, 2) 2nd Priority, Reference 1, 3) 3rd Priority, Reference 2, 4) 4th Priority, Reference 3, and 5) 5th Priority, Reference to specify the prioritized node clock references. An external reference input and any of the serial interfaces may be used for the node reference clock. Reference frequencies must be 32 KHz, n x 64 KHz, or 1,544 KHz up to a maximum of 4096 KHz (2048 KHz maximum on the CTP1002).

  3. From the NetRef Menu, 1) NetRef to enable NetRef on the CTP device..
  4. Enter 2 to select Member mode.
  5. From the NetRef Menu, select 2) NetRef Master IP (Priority 1). and specify the IP address of the NetRef primary node, which is assigned a priority of 1.
  6. From the NetRef Menu, select 3) NetRef Master IP (Priority 1). and specify the IP address of the NetRef primary node, which is assigned a priority of 2.
  7. From the NetRef Menu, select 4) NetRef Master IP (Priority 1). and specify the IP address of the NetRef primary node, which is assigned a priority of 3.
  8. From the NetRef Menu, select 5) NetRef Master IP (Priority 1). and specify the IP address of the NetRef primary node, which is assigned a priority of 4.
Note

When a node is configured for NetRef backup operation, the remote address must be configured to that of the primary node. Likewise, the NetRef primary node must be configured with the IP address of the NetRef backup node. A NetRef primary node can be configured to send data packets to up to 10 NetRef backup nodes.

Rate selection and clock configuration allow the serial interface rate to be configured through the software. Rates supported range from less than 300 bps to 12.288 Mbps (in subhertz increments). You can configure the CTP systems by using the menu interface to provide multiple prioritized node clock references. An external reference input and any of the serial interfaces may be used for the node reference clock. Reference frequencies must be 32 KHz, n x 64 KHz, or 1,544 KHz up to a maximum of 4096 KHz (2048 KHz maximum on the CTP1002).

Follow the onscreen instructions and configure the options as described inTable 1.

Table 1: Configuring Multiple NetRef Primary Node IP Addresses

FieldFunctionYour Action

NetRef Master IP (Priority)

Specifies whether you want to configure multiple primary nodes with priorities, which can be used to transmit clocking information to the backup nodes in NetRef.

Enter 2, 3, 4, and 5 to configure NetRef primary nodes with priorities 1, 2, 3, and 4, respectively.

Configure a NetRef Master? n[y]

Specifies whether you want to configure a NetRef primary node.

Specify y or n.

Enter remote node IP address for NetRef

Specifies the IP address of the NetRef primary node.

Specify IP address of the NetRef primary node assigned with different priorities.

Specify rtn to set the IP address of 127.0.0.1 interface that is prompted by the system to be specified as the default IPv4 address of the primary node. For example, if the prompt displays (rtn for 127.0.0.1), and if you specify rtn, 127.0.0.1 is set as the default IP address.