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Nokia Network Voyager for IPSO 4.0 Reference Guide 365
5. In the Add New OSPF Area text box, enter 1; then click Apply.
6. In the Add new address range: prefix text box for the backbone area, enter
192.168.24.0.
7. In the Mask Length text box, enter 24; then click Apply.
8. Click 1 area in the drop-down list for e2; then click Apply.
9. Click Save.
10. Initiate a Network Voyager session to Nokia Platform D.
11. Click Config on the home page.
12. Click the OSPF link in the Routing Configuration section.
13. In the Add New OSPF Area text box, enter 1; then click Apply.
14. Click 1 area in the drop-down list for e3, then click Apply.
15. Click Save.
RIP
The Routing Information Protocol (RIP) is one of the oldest, and still widely used, interior
gateway protocols (IGP). RIP uses only the number of hops between nodes to determine the cost
of a route to a destination network and does not consider network congestion or link speed.
Other shortcomings of RIP are that it can create excessive network traffic if there are a large
number of routes and that it has a slow convergence time and is less secure than other IGPs, such
as OSPF.
Routers using RIP broadcast their routing tables on a periodic basis to other routers, whether or
not the tables have changed. Each update contains paired values consisting of an IP network
address and a distance to that network. The distance is expressed as an integer, the hop count
metric. Directly connected networks have a metric of 1. Networks reachable through one other
router are two hops, and so on. The maximum number of hops in a RIP network is 15 and the
protocol treats anything equal to or greater than 16 as unreachable.
RIP 2
The RIP version 2 protocol adds capabilities to RIP. Some of the most notable RIP 2
enhancements follow.
Network Mask
The RIP 1 protocol assumes that all subnetworks of a given network have the same network
mask. It uses this assumption to calculate the network masks for all routes received. This
assumption prevents subnets with different network masks from being included in RIP packets.
RIP 2 adds the ability to explicitly specify the network mask for each network in a packet.