Configure Aggregate Routes

Configure aggregate routes so that the router advertises a single route (aggregate route) that represents all destinations. Aggregate routes also reduce the size of routing tables.

Before you begin

  • Enable aggregate routes globally.

  • You need the appropriate aggregate address and mask.

  • If required, policies exist.

  • Change the VRF instance as required to configure BGP on a specific VRF instance. The VRF must have an RP trigger of BGP. Not all parameters are configurable on non-default VRFs.

Procedure

  1. In the navigation pane, expand Configuration > IP.
  2. Click BGP.
  3. Click the Aggregates tab.
  4. Click Insert.
  5. Configure the aggregate Address and PrefixLen.
  6. Select AsSetGenerate or SummaryOnly as required.
  7. Configure policies for the aggregate route.
  8. Click Insert.

Aggregates field descriptions

Use the data in the following table to use the Aggregates tab.

Name

Description

Address

Specifies the aggregate IP address.

PrefixLen

Specifies the aggregate PrefixLen.

AsSetGenerate

Enables or disables AS-set path information generation. The default is disable.

SummaryOnly

Enables or disables the summarization of routes in routing updates. Enable this parameter to create the aggregate route and suppress advertisements of more-specific routes to all neighbors. The default is disable.

SuppressPolicy

Specifies the route policy (by name) used for the suppressed route list. Enable this parameter to create the aggregate route and suppress advertisements of the specified routes.

AdvertisePolicy

Specifies the route policy (by name) used for route advertisements. The route policy selects the routes that create AS-set origin communities.

AttributePolicy

Specifies the route policy (by name) used to determine aggregate route attributes.
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