EW50 Industrial LTE Cellular Gateway
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RIP Scenario
T he Routing Information Protocol (RIP) is one of the
oldest distance-vector routing protocols. It employs
the hop count as a routing metric. RIP prevents routing
loops by implementing a limit on the number of hops
allowed in a path from the source to a destination. The
maximum number of hops allowed for RIP is 15. This
hop limit, however, also limits the size of networks
that RIP can support. A hop count of 16 is considered
an infinite distance, in other words the route is
considered unreachable. RIP implements the split
horizon, route poisoning and hold-down mechanisms
to prevent incorrect routing information from being
propagated.
OSPF Scenario
Open Shortest Path First (OSPF) is a routing protocol
that uses link state routing algorithm. It is the most
widely used interior gateway protocol (IGP) in large
enterprise networks. It gathers link state information
from available routers and constructs a topology map
of the network. The topology is presented as a routing
table which routes datagrams based solely on the
destination IP address.
The network administrator can deploy an OSPF
gateway in large enterprise network to get its routing
table from the enterprise backbone, and forward
routing information to other routers, which are not
linked to the enterprise backbone. Usually, an OSPF
network is subdivided into routing areas to simplify
administration and optimize traffic and resource
utilization.
As shown in the diagram, the OSPF gateway gathers routing information from the backbone gateways in area
0, and will forward its routing information to the routers in area 1 and area 2 which are not in the backbone.
