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Create a Forwarding Rule


You can create a forwarding rule in two ways:

To create a new forwarding rule:

    1. Click the Forwarding Rules link in the Config Tool main menu.

The Forwarding Rule Editing View is presented. The following figure shows an example of this view.

    2. Click the Create button.
    The following figure shows an example of the Forwarding Rule Editing View after you click the Create button.

Note that:

    3. Click the forwarding rule you want the new rule to follow in the Forwarding Rules field.
    4. Type the name of the rule in the Forwarding Rule Name field.
    5. Select a forwarding option in the Forward Option field.
    Available options are: switch, forward, and cache.

    When you select cache, the first packet is processed and the route lookup and policy are cached in the GIGAswitch/IP Switch Controller after the packet is forwarded. Subsequent packets matching the cached state follow the same decision stored in the cached state.

    When you select switch, the route lookup is cached and the flow is eligible to use the hardware accelerator.
    6. Select an encapsulation option in the Encapsulation field.
    Available options are: standard and extended.

    Standard encapsulation is defined in RFC 1954 Type 2 flow, which uses IP source, destination, and TTL to classify packets.

    Extended encapsulation is defined in RFC 1954 Type 1 flow, which uses IP source, destination, TTL, ToS, IPproto, TCP/UDP source port, and TCP destination port to classify packets.

[Note] Use extended encapsulation only when it is necessary to apply QoS to an individual application that uses a specified TCP/UDP port pair.


    7. Type a value in the Wait Packets field.
    If a flow is eligible to use a hardware accelerator, this value defines when the hardware accelerator is used. For example, a value of 10 instructs the GIGAswitch/IP Switch Controller or IP Switch Gateway to wait until at least 10 packets have been forwarded prior to using the hardware accelerator.
    8. Type a value in the Refresh Timer field.
    This timer can be incremented in 20-second intervals. For example, a value of 20 seconds indicates that, in order to be eligible for using the hardware accelerator, a flow must transmit more than Wait Packets number of packets in at least one 20-second interval.
    9. Type a value in the Idle Timer field.
    Once a flow is cached, its state is not deleted until the value in this field is met. This timer can be incremented in 10-second intervals.
    10. Type a value in the Hold Timer field.

    Performance is extremely sensitive to these forwarding attributes; use extreme caution in setting these values.


    11. Click either the Apply button to use these parameters
    or
    Click the Top button to disregard these parameters and return to the previous view.

    The Apply successful message appears if no errors occur.
See also:
Select a Forwarding Rule
Copy a Forwarding Rule
Modify a Forwarding Rule
Delete a Forwarding Rule
Change Rule Order
Forwarding Rule Editing View
Move Rule Within Policy View
QoS Configuration Helpful Hints

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