Cabletron Systems SmartSwitch 8-slot, User'S Reference Manual

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Chapter 6: Routing Policy Configuration Guide
SSR User Reference Manual 6 - 19
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 sev-
eral network specifications associated with it. Every route is checked against the
set of network specifications associated with all route-filters to determine its eli-
gibility 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 iprouter
policy aggr-gen command.
To create aggregates, enter the following command in Configure mode:
The
<aggr-dest-id>
is the identifier of the aggregate-destination that specifies the
aggregate/summarized route.
The
<aggr-src-id>
is 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>
.
The
<filter-id>
is the identifer 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>
.
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]]]]