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M2M Cellular Gateway
Index skipping is used to reserve slots for new function insertion, when required.
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 holddown
mechanisms to prevent incorrect routing information from being propagated.
RIP Configuration
In the "RIP Configuration" window, you can just choose the version of RIP protocol to activate the
dynamic routing feature, or disable it.
OSPF Scenario
Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a
link state routing algorithm and falls into the group of interior routing protocols, operating within
a single autonomous system (AS). OSPF is perhaps the most widely used interior gateway protocol
(IGP) in large enterprise networks. IS‐IS, another link‐state dynamic routing protocol, is more
common in large service provider networks. The most widely used exterior gateway protocol is
the Border Gateway Protocol (BGP), the principal routing protocol between autonomous systems
on the Internet.
OSPF is an interior gateway protocol (IGP) for routing Internet Protocol (IP) packets solely within a
single routing domain, such as an autonomous system. It gathers link state information from
available routers and constructs a topology map of the network. The topology is presented as a
routing table to the Internet Layer which routes datagrams based solely on the destination IP
address found in IP packets.
OSPF detects changes in the topology, such as link failures, and converges on a new loop‐free
routing structure within seconds. It computes the shortest path tree for each route using a
method based on Dijkstra's algorithm, a shortest path first algorithm.
The OSPF routing policies for constructing a route table are governed by link cost factors (external
metrics) associated with each routing interface. Cost factors may be the distance of a router
(round‐trip time), data throughput of a link, or link availability and reliability, expressed as simple
unitless numbers. This provides a dynamic process of traffic load balancing between routes of
equal cost.
An OSPF network may be structured, or subdivided, into routing areas to simplify administration
and optimize traffic and resource utilization. Areas are identified by 32‐bit numbers, expressed
either simply in decimal, or often in octet‐based dot‐decimal notation, familiar from IPv4 address
notation.
OSPF Configuration
In the "OSPF Configuration" window, you can just check the "Enable" box to activate the OSPF
dynamic routing protocol and specify its backbone subnet.
OSPF Area List
The OSPF Area List shows all OSPF area definition. There also be one "Add" button at
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