Tp-Link T2700G-28TQ [188/420] Ospf license required
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Tp-Link T2700G-28TQ [188/420] Ospf license required

Tp-Link T2700G-28TQ [188/420] Ospf license required
176
Configure Switch B
Steps Operation Note
1
Enable RIP Required. On page Routing→ RIP→ Basic Config
, enable RIP,
select RIPv2 as RIP version.
2
Enable the network
segments where
the interfaces are
located
Required. On page Routing→ RIP→ Basic Config Network
Enable part, add network segments 1.1.1.0, 10.1.1.0, 11.1.1.0, and
enable RIP in these network segments. These network segments
will
be displayed in RIP Network List after they are successfully
added.
10.9 OSPF (License Required)
OSPF (Open Shortest Path First) is a routing protocol based on link state and also an internal
gateway protocol, which is developed and recommended by IETF. The OSPF protocol standard in
current use for IPv4 network is OSPF Version 2, which is defined specifically in RFC2328 and will
be introduced generally in this Guide.
Introduction
1. OSPF Features
OSPF protocol is a popular routing protocol in networking with the following features.
Fast convergence – It could send update packets immediately upon the change of network
topology, to quickly synchronize the update for the routers in the autonomous system.
Due to the rapid convergence, OSPF routing protocol acts with great speediness and stability
in the large-scale network, and is not prone to some harmful routing information.
OSPF protocol introduces the concept of area – to manage the autonomous system by area,
which means the routers only need to synchronize the link state database with the other
routers in the same area. Thus, the smaller link state database requires lower memory
consumption from the routers, and the less routing information to manage also releases
certain CPU resources for the routers and meanwhile reduces the network bandwidth
occupied by the routing information.
OSPF protocol supports multiple equal-cost routes to one destination for load balance, thus to
perform more efficient data forwarding.
OSPF supports VLSM route addressing by variable-length subnet mask.
OSPF supports the message authentication based on interfaces, thus to guarantee the
security of message interaction and routing calculation.
OSPF supports using the reserved multicast address in the link of specific network type, to
reduce the influence on the other irrelevant routers.
2. OSPF Common Scenario
OSPF protocol is usually applied in the large complex network environment. Shown as below is
the instance diagram of a large company, where the large network is divided by department. OSPF
protocol works as the fundamental routing protocol among routers, which could guarantee not only
the message interaction but also the network independence among departments.

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