authentication pre-share group 1

hash md5

!

crypto isakmp key 12345678 address 10.0.0.2 255.255.255.192

!

interface fastethernet 0/0

ip address 192.168.99.64 255.255.255.0

!

interface serial 0/0 encapsulation ppp

ip address 10.0.0.1 255.255.255.192 crypto map dynmap

ip hold-time eigrp 1 20 clockrate 48000

!

interface async 0/0

!

router eigrp 1 network 192.168.99.0 network 10.0.0.0

!

line vty 0 5 login

password 7 wAVcXxom8sGSOA

!

ip route 0.0.0.0 0.0.0.0 10.0.0.2

!

access-list 100 permit ip 192.168.99.0 0.0.0.255 192.168.98.0 0.0.0.255

!

end

ERT_805#

4.3 OSPF- Open Shortest Path First

OSPF is a link state protocol and it uses Dijkstra’s Shortest Path First algorithm to run on the link state database. This technology is opposed to a distance-vector technology. OSPF router protocol is interior gateway router protocol that used to make decision on routes in Autonomous system. The link state protocol is use a cost metric to determine the best path to a destination.

When router or network’s topology start to change the routing protocol will generate a LSA and flood it to notify the area or network that belongs.

Types of area

Standard area – This area can accept intra-area, inter-area and external router. This area also can be backbone area.

Backbone area – the backbone (transit) area always labeled area 0. Backbone area is a central entity that contains all other area. The backbone is responsible for distributing routing

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