Configuring Ip Forwarding For Ctp Bundles (Ctp Menu) - Juniper CTP Series Manual

Using Bundles to Create Logical Configurations for Physical Interfaces, CTP Release 7.3, CTPView Release 7.3
Table 17: CTP Bundle IP Forwarding Parameter Settings in CTPView
Field Function
Direct Specifies whether the CTP bundle uses direct drive or IP tables to forward packets.
Drive
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.

Configuring IP Forwarding for CTP Bundles (CTP Menu)

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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:
Disable the bundle before you modify the bundle options.
To configure IP forwarding for CTP bundles using the CTP Menu:
From the CTP Main Menu, select 1) Bundle Operations.
1.
Select 1) CTP.
2.
Select a bundle from the list.
3.
Your Action
Select one:
DISABLED—CTP
uses the kernel's IP
stack to forward
packets.
ENABLED—CTP uses
direct drive to
forward packets.
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