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Configuring PBS and Bridge Ports (CTP Menu)

Configuring a packet-bearing serial (PBS) interface allows you to connect a CTP device to an IP network through a serial interface. A port configured as a PBS interface uses static routes and does not participate in any routed protocol sessions, such as OSPF and RIP.

A port must be configured as either a circuit emulation port or a PBS interface or as a bridge port. The default is the circuit emulation port. You can change the port between circuit emulation and PBS modes from the Node Operations menu. You can configure PBS interface or bridge ports from the CTPView web interface or from the CTP menu. This section describes how to configure PBS from the CTP Menu.

If any port on a CTP node is configured as a PBS or bridge port, then the Direct Drive option is automatically set to Disabled on all bundles on that node. If a port is configured as a PBS or bridge port, then all the bundles on that port is deleted. If a bundle is created on a different port, the Direct Drive option is disabled on that port when other ports are configured as a PBS or bridge port.

Note:

Only users with administrative privileges can configure PBS.

To configure a PBS interface from CTP menu:

  1. From the Main Menu, select 5) Node Operations.
  2. Select 3) Configure network settings > 11) Config port operational mode (CE/PBS/bridge).
  3. Select the port that you want to configure for PBS.
  4. Select 1) Routed (PBS)

    The CTP system restarts after you select the port.

  5. Select 5) Node Operations > 10) Port operations (PBS/bridge).
  6. When prompted, specify the port that you want to configure as a PBS interface.
  7. Select 2) Config.
  8. Specify the options as described in Table 1.
    Table 1: Configuration Options for a PBS Port
    Field Function Your Action

    Port description

    Specifies a description for the port.

    Enter a description of up to 64 alphanumeric characters. Use only the following special characters:

     _ + @ : , . -

    Encapsulation

    PPP and HDLC encapsulation are supported by PBS interfaces. Select the encapsulation from the CLI or from the CTPView drop-down menu.

    Select one:

    • CHDLC

    • PPP

    Local Address of P2P Link

    The PBS interface requires that the IP address of the local IP interfaces be specified.

    Enter the IP address of the local IP interface.

    Remote ip of p2p link

    The PBS interface requires that the IP address of the remote IP interfaces be specified.

    Both the local and the remote IP interfaces must be on the same network.

    Enter the IP address of the remote IP interface.

    Clock Config

    The clock configuration submenu lets you configure port speed and clock configuration. The clocking options include configured rate with and without external TT, all clocked by external TT, and custom clocking.

    CTPView allows you to configure the rate using an input field and to specify the clocking from a drop-down menu of valid options.

    Select one:

    • Cfg Rate - Int Clk—Configured rate without external TX clock (TT). The CTP device synthesizes the rate that is used on the ST and RT outputs to the attached device. The ST output is used to sample Send Data from the attached DTE. The clock is created by the CTP DDS circuitry and logic. This option is commonly used on circuits that are less than 1 Mbps.

    • Cfg Rate - Ext Clk—Configured rate with external TX clock (TT). The CTP device synthesizes the rate that is used on the ST and RT outputs to the attached device. The clock is created by the DDS circuitry and logic. This option is used to sample Send Data from the attached device. It assumes that the attached device is using an ST or a clock reference that is traceable to CTP reference. It is typically used for higher data rates (>1 Mbps) and long cables.

    • All Clock - Ext Clk—All clocked with external TX clock (TT). The CTP clock uses the external TT timing from the DTE for all clocking. Ext TT is used to sample Send Data from the attached device, to generate the RT clock, and to clock data into the IP network.

    • Custom—The custom clocking configuration is used.

    Interface

    The Interface is configurable to be either EIA530, EIA530A, RS232, V.35, or T1/E1 (optional when hardware is installed). The encoding is limited to NRZ.

    Select one:

    • EIA530

    • EIA530A

    • RS232

    • V.35

    • T1/E1

    MTU

    The MTU can be configured to a value up to 1500 bytes. MTU fragmentation is not supported.

    Enter the MTU in bytes. The default value is 1500.

    First static route

    You can configure up to three active static routes that use the PBS interface. The static routes must not conflict with the static routes configured on any other PBS Interfaces.

    Enter up to three static routes.

    Second static route

    Third static route
  9. Select 3) Activate to activate the port that you configured as PBS.

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