Chapter 6: Routing Policy Configuration GuideSSR User Reference Manual6 - 17Creating an Export SourceTo create an export source, enter one of the following commands in Configure mode:Import PoliciesImport policies can be constructed from one or more of the following building blocks:• Import-source - This component specifies the source of the imported routes. It canalso specify the preference to be associated with the routes imported from thissource. The routes to be imported can be identified by their associated attributes,including source protocol, Source interface or gateway from which the route wasreceived, and so on.• Route Filter - This component provides the means to define a filter for the routes tobe imported. Routes that match a filter are considered as eligible for importation.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 theset of network specifications associated with all route-filters to determine its eli-gibility for importation. The identifier associated with a route-filter is used in theip-router policy import command.• Specifying the networks as needed in the ip-router policy import command.If you want to create a complex route-filter, and you intend to use that route-filter inseveral import policies, then the first method is recommended. It you do not havecomplex filter requirements, then use the second method.After you create one or more building blocks, they are tied together by the iprouterpolicy import command.To create route import policies, enter the following command in Configure mode:Create a RIP export source. ip-router policy create rip-export-source <name>Create an OSPF export source. ip-router policy create ospf-export-source <name>Create an import policy. ip-router policy import source [filter|[network[exact|refines|between] [preference|restrict]]]
