Setting Up Ospf - D-Link DFL-260E User Manual

4.5.5. Setting Up OSPF

OffsetMetric
Limit Metric To
4.5.4.4. Routing Action
A Routing Action is used to manipulate and export routing changes to one or more local routing
tables.
Destination
Offset Metric
Offset Metric Type 2
Limit Metric To
Static Route Override
Default Route Override
4.5.5. Setting Up OSPF
Setting up OSPF can seem complicated because of the large number of configuration possibilities
that OSPF offers. However, in many cases a simple OSPF solution using a minimum of
NetDefendOS objects is needed and setup can be straightforward.
Let us examine again the simple scenario described earlier with just two NetDefend Firewalls.
In this example we connect together the two NetDefend Firewalls with OSPF so they can share the
routes in their routing tables. Both will be inside a single OSPF area which will be part of a single
OSPF autonomous system (AS). If unfamiliar with these OSPF concepts, please refer to earlier
sections for further explanation.
Beginning with just one of these firewalls, the NetDefendOS setup steps are as follows:
1. Create an OSPF Router object
Create a NetDefendOS OSPF Router Process object. This will represent an OSPF Autonomous Area
(AS) which is the highest level in the OSPF hierarchy. Give the object an appropriate name. The
Router ID can be left blank since this will be assigned automatically by NetDefendOS.
2. Add an OSPF Area to the OSPF Router
Within the OSPF Router Process created in the previous step, add a new OSPF Area object. Assign
an appropriate name and use the value 0.0.0.0 for the Area ID.
An AS can have multiple areas but in many cases only one is needed. The ID 0.0.0.0 identifies this
area as the backbone area which forms the central portion of the AS.
3. Add OSPF Interfaces to the OSPF Area
Within the OSPF Area created in the previous step, add a new OSPF Interface for each physical
regard external routes as type 1 OSPF routes. Type 2 is the most
significant cost of a route.
Increases the metric of an imported route by this value.
Limits the metrics for these routes to a minimum and maximum value.
If a route has a higher or lower value than specified then it will be set to
the specified value.
Specifies into which routing table the route changes to the OSPF
AS should be imported.
Increases the metric by this value.
Increases the Type 2 router's metric by this value.
Limits the metrics for these routes to a minimum and maximum
value. If a route has a higher value than specified then it will be
set to the specified value.
Allows the override of the static routes.
Allows the override of the default route.
213
Chapter 4. Routing