1. NAT(Network Address Translation)
Thus_11.01
NAT(Network Address Translation)
하나의 외부IP가지고
사설IP가 사용함
사설IP를 외부IP로 변경해줌
주소 변환이 되어야함
공유기에서 IP를
IP:port - 공인 IP
공인IP:port - 공인 IP
- krnic - kisa.or.kr
공인IP를 관리함

2. NAT(Network Address Translation)
Thus_11.01
NAT(Network Address Translation)
//===== router1 ==========================
line con 0
logg sy
int f0/0
ip add
no shutdown
do write
int f0/1
ip add
rou os 10
net area 10
net area 10
passive-interface f0/0
### NAT 쓸때 기본 설정 ###
ip nat inside
ip nat outside
######################
####Static NAT 설정### 1:1
ip nat inside source static
do write
##############
### Dynamic NAT ### N:N
access-list 1 permit
ip nat pool babo netmask
ip nat inside source list 1 pool babo
#################
### Dynamic NAT-PAT ### 1:N
ip nat pool babo netmask
ip nat inside source list 1 pool babo overload
#####################
show ip nat tr <- NAT 기능에 의해 IP 바뀔 때 무엇으로 바뀌는지 볼 수 있음
=======================================

3. NAT(Network Address Translation)
Thus_11.01
NAT(Network Address Translation)
//===== router2 ===========================
line con 0
logg sy
int f0/0
ip add
no shutdown
do write
int f0/1
ip add
rou os 10
net area 10
net area 10
passive-interface f0/0
show ip nat translations
=========================================
clear ip ospf process <-- ospf 초기화
debug ip ospf adj
no dbug ip os ev
debug ip ospf events

4. Thus_11.01
NAT(Network Address Translation)

5. NAT(Network Address Translation)
Thus_11.01
NAT(Network Address Translation)
#### 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
pass babo2
int f0/0
ip add
no shutdown
int f0/1
ip add
do write
exit
rout ei 100
net
net
pass f0/0
#### 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
pass babo2
int f0/0
ip add
no shutdown
do write
int f0/1
ip add
exit
rout ei 100
net
net
pass f0/0
### NAT 1:N 설정 ###
access-list 1 permit
ip nat pool babo netmask
int f0/0
ip nat inside
int f0/1
ip nat outside
exit
ip nat inside source list 1 pool babo overload
====================================

6. Thus_11.01
HSRP(Hot Standby Router Protocol)

7. HSRP(Hot Standby Router Protocol)
Thus_11.01
HSRP(Hot Standby Router Protocol)
#Virtual Router 존재 알려줌
int f0/0
standby 1 ip
standby 1 priority 120
standby 1 preempt
do write
#Virtual Router 동작 확인
show standby bri
show standby all
=========================================
HSRP(Hot Stadnby Router Protocol)
Cisco
VRRP(Virtual Router Redundancy Protocol)
IBM
GLBP(Gateway Load Balancing Protocol)
Down Time 시간이 없음
=========================================
### Router 1 ###
enable
conf ter
int f0/0
ip add
no shutdown
int f0/1
ip add
exit
rout os 10
net area 0
net area 0
do write

8. HSRP(Hot Standby Router Protocol)
Thus_11.01
HSRP(Hot Standby Router Protocol)
=========================================
### Router 2 ###
enable
conf ter
int f0/0
ip add
no shutdown
do write
int f0/1
ip add
rout os 10
net area 0
net area 0
#Virtual Router 존재 알려줌
standby 1 ip
standby 1 priority 120
standby 1 preempt
=========================================
### Router 3 ###
enable
conf ter
int f0/1
ip add
no shutdown
do write
int f0/0
ip add
int f1/0
ip add
router os 10
net area 0
net area 0
net area 0
### PC3 ###
ping
arp -a