User's Manual

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router.
ipv6 ospf hello-interval
seconds Sets the interval for the OSPFv3 interface to
transmit the Hello packets.
ipv6 ospf dead-interval
seconds Means that in a regulated interval if the
OSPFv3 packets are not received from a
neighboring router, this neighboring router is
viewed to be shut down.
80.3.3 Setting OSPFv3 on Different Physical Networks
OSPFv3 divides physical network media into the following three kinds:
 Broadcast networks (Ethernet, Token Ring, FDDI)
 Non-broadcast and multi-access networks (SMDS, Frame Relay, X.25)
 Point-to-point networks (HDLC, PPP)
80.3.4 Setting the OSPF Network Type
No matter what physical media type the network is, you can configure your network to be a broadcast network,
a non-broadcast network or a multi-access network. So you can set your network flexibly and your network
can be set to be a non-broadcast and multi-access one, or a broadcast network such as the X.25, Frame Relay
or SMDS network. Also the neighbor’s settings will be simplified.
To set an un-broadcast and multi-access network is to suppose that every two routers have a virtual link or
suppose a full-mesh network. It is unrealistic due to unbearable cost. But you set this network to be a point-to-
multipoint one. Between those routers which are not adjacent the routing information can be switched through
the virtual link.
The OSPFv3 point-to-multipoint interface can be set to be multipoint-to-point interface, through which multiple
routes of a host can be established. The OSPFv3 point-to-multipoint network, comparing with the non-
broadcast and multi-access network or the point-to-point network, has the following advantages:
 The point-to-multipoint network is easy to be set without generating DR.
 This kind of network do not require the full-mesh topology, so the construction cost is
relatively low.
 This kind of networks are more reliable. Even if its virtual link fails, the connection can be
maintained.
The network type of the routers is the broadcast type.
80.3.5 Setting the Parameters of the OSPFv3 Domain
The configurable domain parameters include: authentication, designating a stub area and specifying a weight
for a default summary route. Its authentication is based on password protection.
The stub area means that external routes cannot be distributed to this area. Instead, ABR generates a default
external route that enters the stub area, enabling the stub area to communicate with external networks of an
autonomous area. In order to make use of the attributes supported by the OSPF stub, the default route must
be used in the stub area. To further reduce LSAs that are forwarded to the stub area, you can forbid the
summary function on ABR.