[keduit]DHCP_Relay_Agent, NAT_PT -2023/03/24

Default

[ISP]

int f1/0

no sh

mac-address 40ab.26b4.ed16

ip add dhcp

int f0/1

no sh

ip add 1.1.12.9 255.255.255.0

exit

int f0/0

no sh

ip add 24.24.10.254 255.255.255.0

exit

 

[R2]

int f0/1

no sh

ip add 1.1.12.10 255.255.255.0

exit

int f0/0

no sh

ip add 1.1.30.254 255.255.255.0

exit

---

ROUTING

[ISP]

ip route 0.0.0.0 0.0.0.0 FastEthernet1/0 10.0.0.1
ip route 1.1.30.0 255.255.255.0 FastEthernet0/1 1.1.12.10

#10.0.0.1 은 내 PC네트워크 기본 게이트웨이 이다.#

[R2]

ip route 0.0.0.0 0.0.0.0 f0/1 1.1.12.9

---

NAT_PT

[ISP]

access-list 10 permit 1.1.30.0 0.0.0.255 

access-list 10 permit 24.24.10.0 0.0.0.255

ip nat inside source list 10 int f1/0 overload

 

int f1/0

ip nat outside

exit

int range f0/0 - 1

ip nat inside

exit

 

## named방식이라면 ##

ip access-list standard NAT10

permit 1.1.30.0 0.0.0.255

permit 24.24.10.0 0.0.0.255

ip nat inside source list 10 int f1/0 overload

####################

---

DHCP

[ISP]

ip dhcp pool NET24
   network 24.24.10.0 255.255.255.0
   dns-server 168.126.63.1 
   default-router 24.24.10.254 
   lease 8
   class N24
      address range 24.24.10.1 24.24.10.253

exit

 

ip dhcp pool NET1
   network 1.1.30.0 255.255.255.0
   default-router 1.1.30.254 
   dns-server 168.126.63.1 
   lease 8
   class N1
      address range 1.1.30.1 1.1.30.253

exit

 

int f0/0

ip dhcp client class-id N24

exit

int f0/1

ip dhcp client class-id 1

exit

[R2]

int f0/0

ip helper-address 1.1.12.9

exit

 

[PC1]

no ip routing

int f0/0

no sh

ip add dhcp

exit

 

##디스커버를 보냄##

[PC2]

no ip routing

int f0/0

no sh

ip add dhcp

exit

---

## RIP v2 ROUTING ##

[ISP]

router rip

ver 2

net 1.0.0.0

net 24.0.0.0 (PC1 PC2 통신목적)

no auto

passive f0/0

default-information originate (...)

exit

 

[R2]

router rip

ver 2

net 1.0.0.0

net 24.0.0.0

no auto

passive f0/0

exit