Riverstone Networks WICT1-12 - Manual (Page 447)

Riverstone Networks RS Switch Router User Guide Release 8.0 18-17
Routing Policy Configuration Configuring Advanced Routing Policies
• Aggregate-Destination - This component specifies the aggregate/summarized route. It also specifies
the attributes associated with the aggregate route. The preference to be associated with an aggregate
route can be specified using this component.
• Aggregate-Source - This component specifies the source of the routes contributing to an
aggregate/summarized route. It can also specify the preference to be associated with the contributing
routes from this source. The routes contributing to an aggregate can be identified by their associated
attributes, including protocol type, tag associated with a route, and so on.
• Route Filter - This component provides the means to define a filter for the routes to be aggregated
or summarized. Routes that match a filter are considered as eligible for aggregation. This can be
done using one of two methods:
- Creating a route-filter and associating an identifier with it. A route-filter has several network
specifications associated with it. Every route is checked against the set of network specifications
associated with all route-filters to determine its eligibility for aggregation. The identifier
associated with a route-filter is used in the
ip-router policy aggr-gen
command.
- Specifying the networks as needed in the
ip-router policy aggr-gen
command.
• If you want to create a complex route-filter, and you intend to use that route-filter in several
aggregates, then the first method is recommended. It you do not have complex filter requirements,
then use the second method.
After you create one or more building blocks, they are tied together by the
ip-router policy aggr-gen
command.
To create aggregates, enter the following command in Configure mode:
<aggr-dest-id> The identifier of the aggregate-destination that specifies the aggregate/summarized route.
<aggr-src-id> The identifier of the aggregate-source that contributes to an aggregate route. If an aggregate has
more than one aggregate-source, then the
ip-router policy aggr-gen destination
<aggr-dest-id> command should be repeated for each <aggr-src-id>.
<filter-id> The identifier of the route-filter associated with this aggregate. If there is more than one route-filter
for any aggregate-destination and aggregate-source combination, then the
ip-router policy
aggr-gen destination
<aggr-dest-id>
source
<aggr-src-id> command should be repeated
for each <filter-id>.
18.3.8 Creating an Aggregate Destination
To create an aggregate destination, enter the following command in Configure mode:
Create an aggregate
route.
ip-router policy aggr-gen destination
<aggr-dest-id>
[source <aggr-src-id>
[filter
<filter-id>
|[network
<ipAddr-mask>
[exact|refines|between
<low-high>
]
[preference
<number>
|restrict]]]]
Create an aggregate destination.
ip-router policy create aggr-gen-dest
<name>
network
<ipAddr-mask>