Ccna 4 2.6.1

Hostname ISP
ISP(config)#ip route 10.1.1.0 255.255.255.252 serial 0/0/1
ISP(config)#ip route 192.168.1.0 255.255.255.0 serial 0/0/1

Hostname CENTRAL
CENTRAL(config)#ip route 0.0.0.0 0.0.0.0serial 0/0/1
CENTRAL (config)#username BRANCH password cisco123
CENTRAL(config)#int s0/0/0
CENTRAL(config)#encapsulation ppp
CENTRAL(config)#ppp authentication chap
CENTRAL(config)#exit
CENTRAL(config)#router ospf 1
CENTRAL (config-router)#default-information originate
CENTRAL (config-router)#passive-interface s0/0/1


Hostname BRANCH
Router(config)#hostname BRANCH
BRANCH (config)#intFa0/0
BRANCH (config-if)#no shutdown
BRANCH (config-if)#int fa0/0.1
BRANCH (config-subif)#encapsulation dot1q 1
BRANCH (config-subif)#ip add 192.168.1.193 255.255.255.224
BRANCH (config- subif)#noshutdown
BRANCH (config-if)#int fa0/0.15
BRANCH (config-subif)#encapsulation dot1q 15
BRANCH (config-subif)#ip add 192.168.1.1 255.255.255.128
BRANCH (config- subif)#no shutdown
BRANCH(config-if)#int fa0/0.25
BRANCH (config-subif)#encapsulation dot1q 25
BRANCH (config-subif)#ip add 192.168.1.129 255.255.255.192
BRANCH (config- subif)#no shutdown
BRANCH (config-if)#int fa0/0.99
BRANCH(config-subif)#encapsulation dot1q 99 native
BRANCH (config-subif)#ip add 192.168.1.225 255.255.255.224
BRANCH (config- subif)#no shutdown
BRANCH (config-subif)#exit
BRANCH (config)#usernameCENTRAL password cisco123
BRANCH (config-if)#int s0/0/0
BRANCH (config-if)#ip add 10.1.1.1 255.255.255.252
BRANCH (config-if)#encapsulation ppp
BRANCH (config-if)#ppp authentication chap
BRANCH(config- if)#clock rate 64000
BRANCH (config- if)#no shutdown
BRANCH (config-subif)#exit
BRANCH (config)#router ospf 1
BRANCH (config-router)#passive-interface fastEthernet 0/0.1
BRANCH(config-router)#passive-interface fastEthernet 0/0.15
BRANCH (config-router)#passive-interface fastEthernet 0/0.25
BRANCH (config-router)#passive-interface fastEthernet 0/0.99
BRANCH (config-router)#exit...