3Com Switch 8800 Advanced Software V5 Configuration Guide

334 CHAPTER 30: OSPF CONFIGURATION
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■ Different OSPF processes can disable the same interface from sending OSPF
packets. Use of the silent-interface command disables only the interfaces
associated with the current process rather than interfaces associated with other
processes.
■ After an OSPF interface is set to silent, other interfaces on the router can still
advertise direct routes of the interface in router LSAs, but no OSPF packet can
be advertised for the interface to find a neighbor. This configuration can
enhance adaptability of OSPF networking and reduce resource consumption.
Configuring Stub
Routers
A stub router is used for traffic control. It informs other OSPF routers not to use it
to forward data, but they can have a route to the stub router.
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.
To configure a router as a stub router, use the following commands:
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A stub router has nothing to do with a stub area.
Configuring OSPF
Authentication
By supporting packet authentication, OSPF receives packets that pass the
authentication only, so failed packets cannot establish neighboring relationship.
To configure OSPF authentication, use the following commands:
To do... Use the command... Remarks
Enter system view system-view -
Enter OSPF view ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
-
Configure the router as a
stub router
stub-router Required
Not configured by default
To do... Use the command... Remarks
Enter system view system-view -
Enter OSPF view ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
-
Enter area view area area-id -
Configure the authentication
mode
authentication-mode {
simple | md5 }
Required
Not configured by default
Exit to OSPF view quit -
Exit to system view quit -