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    Configuring IP Forwarding for CTP Bundles (CTPView)

    There are two ways to set up CTP bundles for IP forwarding:

    • Direct drive—Packets are forwarded directly between drivers on the local and remote CTP device. Use this method for simple port-to-port configurations. We recommend that you use this method with supervision from JTAC.
    • Direct drive disabled—Packets are forwarded based on information in the kernel’s IP stack.

    Before you begin:

    • Log in to the CTPView software at least at the Net_Admin level.
    • Connect the CTPView server to the CTP device for which you want to configure bundles.

    To configure IP forwarding for CTP bundles using CTPView:

    1. In the side pane, select Bundle > Configuration.
    2. Run your mouse over the Display and Select an Existing Bundle bar.
    3. In the table of bundles, select the bundle that you want to modify.
    4. Under Bundle Options, select Advanced Options Show to display advanced parameters and configure the parameters as described in Table 1.

    5. Click Click to Submit Bundle AND Port Changes.

    Table 1: CTP Bundle IP Forwarding Parameter Settings in CTPView

    FieldFunctionYour Action

    Direct Drive

    Specifies whether the CTP bundle uses direct drive or IP tables to forward packets.

    If you are using route redundancy, port mirroring, or VLANs, you must disable direct drive and use IP tables.

    If any port on the CTP node is configured for a PBS or bridged port, then the Direct Drive option is automatically set to Disabled on all existing and future bundles on that node.

    If a port is configured as a PBS or bridged port, then the bundles on that port is deleted. If a bundle is created on a different port, then it disables Direct Drive on that port when other ports are configured as a PBS or bridged port.

    Until CTPView Release 7.1R1, the direct drive feature is enabled by default and this functionality configuration is not displayed in the output of the bundle query. If you explicitly enabled the direct drive capability (using IP tables instead of direct drive for packet-forwarding) by using the selecting No for the Disable direct drive field in the Advanced Options screen of the Configuration window under Bundle Operations of the CTP Main Menu, bundle query displayed "NotDirDrv" when you run the bundle query from the Main Menu of CTP Menu by selecting 1) Query. Starting with CTPOS and CTPView Release 7.2, the default behavior is direct-drive disabled (IP table is turned on for forwarding of packets). With default configuration, the bundle query output does not display the direct drive settings. Only if you explicitly enable the direct-drive capability, the bundle query output displays "Bndl Config Flags: DirDrv" in bundle query. CTP bundle circuits that use route redundancy and port forwarding must have direct drive disabled to allow for asymmetric routing. When direct drive is disabled, packets are forwarded based on information in the kernel’s IP stack. When direct drive is enabled, packets are forwarded directly between drivers on the local and remote CTP device.

    Select one:

    • DISABLED—CTP uses the kernel’s IP stack to forward packets.
    • ENABLED—CTP uses direct drive to forward packets.

    Modified: 2015-05-22