User's Manual

Table Of Contents
443
Users Manual of CS-6306R
45.3.3.5 Configuring OSPF Area Parameters
The configurable area parameters include authentication, stub area and the value of the default routing
summary. The authentication is based on the password protection.
Stub area is an area which exterior routes are not sent to. ABR generates a default exterior route to enter the
stub area, enabling stub area to connect exterior networks out of the automatic area. To utilize the feature that
OSPF stub supports, the default route must be used in the stub area. To further reduce the LSAs to enter the
stub area, you need select the option No Summary in the ABR.
Run the following command in switch configuration mode to set area parameters:
Command Purpose
areaarea-idauthentication simple
Activates the authentication of the
OSPF area.
areaarea-idauthentication
message-digest
Specifies the MD5 authentication as
the authentication OSPF.
areaarea-idstub [no-summary]
Defines a stub area.
area area-iddefault-cost cost
Set the value of the default route in the
stub area.
45.3.3.6 Configuring Routing Summary in the OSPF Area
The feature enables the ABR to broadcast a summary route to other areas. In OSPF, ABR is to broadcast
every network to other areas. If the network number is distributed serially according to some method, you can
configure ABR to broadcast a summary route to other areas. The summary route can cover all networks in a
certain range.
Run the following command in switch configuration mode to set the address range:
Command Purpose
areaarea-idrangeaddress mask
Sets the address range of the summary
area.
45.3.3.7 Configuring Forwarded Routing Summary
When the routes are distributed from other areas to the OSPF area, each route will be uniquely broadcast in
the exterior LSA method. However, you can configure the switch to broadcast a route, which can cover a
certain address area. This method reduces the size of the OSPF link state database.
Run the following command in switch configuration mode to configure the summary route:
Command Purpose
summary-addressprefixmask [not
advertise]
Describes the address and mask
covering the distributed route. Only one
summary route is broadcast.