PLANET XGS3-24042 - Manual (Page 296)

37-2
destination, and route table is built based on this database. When a RIPng layer3 switch sent route update
packets to its neighbor devices, the complete route table is included in the packets. Therefore, in a large
network, routing data to be transferred and processed for each layer3 switch is quite large, causing degraded
network performance.
Besides the above mentioned, RIPng protocol allows IPv6 route information discovered by the other routing
protocols to be introduced to the route table.
The operation of RIPng protocol is shown below:
1． Enable RIPng The switch sends request packets to the neighbor layer3 switches by broadcasting; on
receiving the request, the neighbor devices reply with the packets containing their local routing
information.
2． The Layer3 switch modifies its local route table on receiving the reply packets and sends triggered
update packets to the neighbor devices to advertise route update information. On receiving the
triggered update packet, the neighbor lay3 switches send triggered update packets to their neighbor
lay3 switches. After a sequence of triggered update packet broadcast, all layer3 switches get and
maintain the latest route information.
In addition, RIPng layer3 switches will advertise its local route table to their neighbor devices every 30
seconds. On receiving the packets, neighbor devices maintain their local route table, select the best route and
advertise the updated information to their own neighbor devices, so that the updated routes are globally valid.
Moreover, RIP uses a timeout mechanism for outdated route, that is, if a switch does not receive regular
update packets from a neighbor within a certain interval (invalid timer interval), it considers the route from that
neighbor invalid, after holding the route fro a certain interval (garbage collect timer interval), it will delete that
route.
As a result of continuous development of IPv6 network, it has the network environment of nonsupport IPv6
sometimes, so it needs to do the IPv6 operation by tunnel. Therefore, our RIPng supports configuration on
configure tunnel, and passes through nonsupport IPv6 network by unicast packet of IPv4 encapsulation.
37.2 RIPng Configuration Task List
RIPng Configuration Task List:
1. Enable RIPng protocol (required)
（1） Enable/disable RIPng protocol
（2） Configure the interfaces running RIPng protocol
2. Configure RIPng protocol parameters (optional)
（1） Configure RIPng sending mechanism
1) Configure specified RIPng packets transmission address
（2） Configure RIP routing parameters
1) Configure route introduction (default route metric, configure routes of the other protocols to be
introduced in RIPng)
2) Configure the route deviation
3) Configure and apply route filter
4) Configure split horizon