[Cloud_Training] 181101 NAT, HSRP

181101.pptx

Index

1. NAT(Network Address Translation)

2. NAT 실습 - 1

3. NAT 실습 - 2

4. HSRP(Hot Standby Router Protocol)

5. HSRP 실습

1. NAT(Network Address Translation)

NAT 기능

하나의 외부IP가지고

사설IP가 사용함

사설IP를 외부IP로 변경해줌

주소 변환이 되어야함

공유기에서 IP를 

IP:port - 공인 IP

공인IP:port - 공인 IP

https://한국인터넷정보센터.한국

 - krnic - kisa.or.kr

공인IP를 관리함

2. NAT 실습 - 1

//=== router1 ===

line con 0

logg sy

int f0/0

ip add 10.0.0.254 255.255.255.0

no shutdown

do write

int f0/1

ip add 100.100.100.1 255.255.255.248

no shutdown

do write

rou os 10

net 10.0.0.0 0.0.0.255 area 10

net 100.100.100.0 0.0.0.7 area 10

passive-interface f0/0

do write

//=== router2 ===

line con 0

logg sy

int f0/0

ip add 10.0.1.254 255.255.255.0

no shutdown

do write

int f0/1

ip add 100.100.100.2 255.255.255.248

no shutdown

do write

rou os 10

net 10.0.1.0 0.0.0.255 area 10

net 100.100.100.0 0.0.0.7 area 10

passive-interface f0/0

do write

show ip nat translations

3. NAT 실습 - 2

#### Router1 ####

host seoul_R1

ena se babo

no ip domain-l

ser p

line con 0

exec 0 0

logg syn

pass babo1

login

line vty 0 0

exec 0 0

logg syn

pass babo2

login

int f0/0

ip add 10.0.0.254 255.255.255.0

no shutdown

int f0/1

ip add 200.200.200.1 255.255.255.248

no shutdown

do write

exit

rout  ei 100

net 10.0.0.0 0.0.0.255

net 200.200.200.0 0.0.0.7

pass f0/0

do write

#### Router2 ####

enable

conf ter

host Busan_R1

no ip domain-l

ena se babo

ser p

line con 0

exec 0 0

logg syn

pass babo1

login

line vty 0 4

exec 0 0

logg syn

pass babo2

login

int f0/0

ip add 172.16.0.254 255.255.255.0

no shutdown

do write

int f0/1

ip add 200.200.200.2 255.255.255.248

no shutdown

do write

exit

rout  ei 100

net 172.16.0.0 0.0.0.255

net 200.200.200.0 0.0.0.7

pass f0/0

do write

### NAT 1:N 설정 ###

access-list 1 permit 10.0.0.0 0.0.0.255

ip nat pool babo 200.200.200.1 200.200.200.1 netmask 255.255.255.248

int f0/0

ip nat inside

int f0/1

ip nat outside

exit

ip nat inside source list 1 pool babo overload

4. HSRP(Hot Standby Router Protocol)

HSRP(Hot Stadnby Router Protocol)

Cisco

VRRP(Virtual Router Redundancy Protocol)

IBM

GLBP(Gateway Load Balancing Protocol)

Down Time 시간이 없음

5. HSRP 실습

### Router 1 ###

enable

conf ter

int f0/0

ip add 1.0.0.251 255.255.255.0

no shutdown

int f0/1

ip add 10.0.0.1 255.255.255.252

no shutdown

exit

rout os 10

net 1.0.0.0 0.0.0.255 area 0

net 10.0.0.0 0.0.0.3 area 0

do write

#Virtual Router 존재 알려줌

int f0/0

standby 1 ip 1.0.0.254

standby 1 priority 120

standby 1 preempt

do write

#Virtual Router 동작 확인

show standby bri

show standby all

### Router 2 ###

enable

conf ter

int f0/0

ip add 1.0.0.252 255.255.255.0

no shutdown

do write

int f0/1

ip add 10.0.0.5 255.255.255.252

no shutdown

rout os 10

net 10.0.0.4 0.0.0.3 area 0

net 1.0.0.0 0.0.0.255 area 0

#Virtual Router 존재 알려줌

int f0/0

standby 1 ip 1.0.0.254

standby 1 priority 120

standby 1 preempt

do write

### Router 3 ###

enable

conf ter

int f0/1

ip add 10.0.0.2 255.255.255.252

no shutdown

do write

int f0/0

ip add 10.0.0.6 255.255.255.252

no shutdown

do write

int f1/0

ip add 100.100.100.254 255.255.255.0

no shutdown 

do write

router os 10

net 10.0.0.0 0.0.0.3 area 0

net 10.0.0.4 0.0.0.3 area 0

net 100.100.100.0 0.0.0.255 area 0

do write