Importing Routes From An Ospf As Into The Main Routing Table - D-Link NetDefend DFL-210 User Manual

4.4.3. Dynamic Routing Policy
In a dynamic routing environment, it is important for routers to be able to regulate to what extent
they will participate in the routing exchange. It is not feasible to accept or trust all received routing
information, and it might be crucial to avoid that parts of the routing database gets published to oth-
er routers.
For this reason, NetDefendOS provides a Dynamic Routing Policy, which is used to regulate the
flow of dynamic routing information.
A Dynamic Routing Policy rule filters either statically configured or OSPF learned routes according
to parameters like the origin of the routes, destination, metric and so forth. The matched routes can
be controlled by actions to be either exported to OSPF processes or to be added to one or more rout-
ing tables.
The most common usages of Dynamic Routing Policy are:
• Importing OSPF routes from an OSPF process into a routing table.
• Exporting routes from a routing table to an OSPF process.
• Exporting routes from one OSPF process to another.
4.4.3.2. Importing Routes from an OSPF AS into the Main Routing
Table
In this example, the routes received using OSPF will be added into the main routing table.
Example 4.6. Importing Routes from an OSPF AS into the Main Routing Table
First of all a Dynamic Routing Policy filter needs to be created. The filter needs to have a name, in this example
ImportOSPFRoutes is used, as it explains what the filter does.
The filter must also specify from what OSPF AS the routes should be imported. In this example, a pre-configured
OSPF AS named as0 is used.
Depending on how your routing topology looks like you might want to just import certain routes using the Destina-
tion Interface/Destination Network filters, but in this scenario all routes that are within the all-nets network (i.e.
0.0.0.0/0) are allowed.
CLI
gw-world:/> add DynamicRoutingRule OSPFProcess=as0 Name=ImportOSPFRoutes
Web Interface
1. Go to Routing > Dynamic Routing Rules > Add > Dynamic routing policy rule
2. Specify a suitable name for the filter, in this case ImportOSPFRoutes.
3. In the Select OSPF Process, make as0 selected.
4. Choose all-nets in the ...Exactly Matches dropdown control.
5. Click OK.
The next step is to create a Dynamic Routing Action that will do the actual importing of the routes into a routing ta-
Note
By default, NetDefendOS will not import or export any routes. In other words, for dy-
namic routing to be meaningful, it is mandatory to define at least one Dynamic Rout-
ing Policy rule.
DestinationNetworkExactly=all-nets
85
Chapter 4. Routing