Configuring The Ospf Area Parameters - D-Link xStack DGS-3610 Series Configuration Manual

DGS-3610 Series Configuration Guide
message from the designated routers within specified time and it is considered that the
router is down.
To configure the broadcast network type, execute the following commands in the interface
configuration mode:
Command
DGS-3610(config-if)# ip ospf network
broadcast
DGS-3610(config-if)# ip ospf priority priority
28.2.4 Configuring the OSPF Area
Parameters
To configure area authentication, stub area, and default route total cost, you need to
implement this through configuring the area commands.
Area authentication is configured to avoid the learning of non-authenticated and invalid
routers and the notificaion of invalid routes to the non-authentication route. In the broadcast
network, area authentication can also prevent non-authentication routers from becoming the
designated routers to ensure that the stability and intrusion prevention of the routing system.
When an area is the leaf area of the OSPF route domain, which means that the area does
not act as the transit area, neither does it injects external routes to the OSPF routing area,
you can configure the area as a stub area. The stub area routers can only learn about three
routes, namely, 1) Routes in the stub area, 2) Other area routes, and 3) Default routes
advertised by the border router in the stub area. For there is no much external routing, the
route table of the stub area routers is small and it can save the resource of routers, so the
stub area routers may be low- or middle-level of routers. To further reduce the Link Status
Advertisements (LSA) sent to the stub areas, you can configure an area as the full stub area
(configured with the no-summary option). The routers in a full stub area can learn two types
of routes: 1) routes in the stub area; 2) default routes advertised by the border router in the
stub area. The configuration of the full stub area allows the OSPF to occupy the minimized
router resources, increasing the network transmission efficiency.
If the routers in a stub area can learn multiple default routes, you need to set the costs of the
default routes (by using the area default-cost command), so that they first use the specified
default route.
You should pay attention to the following when you configure the STUB area:
The backbone area cannot be configured as a STUB area, and the STUB area cannot

be used as the transmission area of the virtual links.
To set an area as the STUB area, all the routers in the area must be configured with this

attribute.
Chapter 28 OSPF Routing Protocol Configuration
Function
Specify the type of the interface to be the
broadcast network type
(Optional) Specify the priority of the interface
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