3Com Switch 4800G 24-Port Configuration Manual page 304

304 C 28: OSPF C
HAPTER
Configuring Stub
Routers
n
Configuring OSPF
Authentication
n
ONFIGURATION
A stub router is used for traffic control. It tells other OSPF routers not to use it to
forward data, but they can have a route to it.
The Router LSAs from the stub router may contain different link type values. A
value of 3 means a link to the stub network, so the cost of the link remains
unchanged. A value of 1, 2 or 4 means a point-to-point link, a link to a transit
network or a virtual link. In such cases, a maximum cost value of 65535 is used.
Thus, other neighbors find the links to the stub router have such big costs, they
will not send packets to the stub router for forwarding as long as there is a route
with a smaller cost.
Follow these steps to configure a router as a stub router:
To do...
Enter system view
Enter OSPF view
Configure the router as
a stub router
A stub router has nothing to do with a stub area.
By supporting packet authentication, OSPF receives packets that pass the
authentication only, so failed packets cannot establish neighboring relationships.
Follow these steps to configure OSPF authentication:
To do...
Enter system view
Enter OSPF view
Enter area view
Configure the authentication
mode
Exit to OSPF view
Exit to system view
Enter interface view
Configure the authentication
mode (simple authentication)
for the interface
Configure the authentication
mode (MD5 authentication)
for the interface
The authentication mode and password for all interfaces attached to the same
area must be identical.
Use the command...
system-view
ospf [ process-id | router-id router-id ] * -
stub-router
Use the command...
system-view
ospf [ process-id | router-id
router-id ] *
area area-id
authentication-mode
{ simple | md5 }
quit
quit
interface interface-type
interface-number
ospf authentication-mode
simple [ plain | cipher ]
password
ospf authentication-mode
{ md5 | hmac-md5 } key-id
[ plain | cipher ] password
Remarks
-
Required
Not configured by default
Remarks
-
-
-
Required
Not configured by default
-
-
-
Optional
Not configured by default