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Aggregate Routes


Aggregation combines multiple static routes into a single entry in the routing table.

The success of aggregation is largely dependent on careful allocation of network addresses.

For example: Router A <---------> Router B <--------> Router C

If the routing table for Router B has:

10.1.16.0

masklen 22

10.1.20.0

masklen 22

10.1.24.0

masklen 22

10.1.28.0

masklen 22

Aggregation reduces the routing table entry on Router C to a single entry:

10.1.16.0

masklen 20


[Note] Aggregation occurs on the even bit boundary from the left.


To aggregate a new set of static routes:

    1. Click the Route Aggregation link in the Routing Configuration section of the Config Tool main menu.
    The Route Aggregation View is presented. The following figure shows an example of the Route Aggregation View.

    2. Type the prefix of the static routes to aggregate in the Add New Aggregate field.
    This is the portion of the IP address shared by all static routes to be aggregated (for example 10.0.2.1).
    3. Type the mask length in the Mask Length field.
    This is the number of bits in the prefix. If you leave this field blank, Config Tool assigns the value.
    4. 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:
Route Aggregation View

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