網絡描述：客戶是個大型鋼廠，有多個分支廠區，采用OSPF多區域配置；網關都在分支的匯聚交換機上，但是DHCP地址池都統一在核心交換機上配置。

拓撲如下：

(相關資料圖)

關鍵設備配置：

R１

acl number 2000

rule 5 permit

interface GigabitEthernet0/0/0

ip address 10.1.200.1 255.255.255.252

#

interface GigabitEthernet0/0/1

ip address 221.1.1.2 255.255.255.0

nat outbound 2000

＃interface LoopBack0

ip address 10.1.0.1 255.255.255.255

#

ospf 1 router-id 10.1.0.1

default-route-advertise

area 0.0.0.0

network 10.1.0.1 0.0.0.0

network 10.1.200.1 0.0.0.0

#

ip route-static 0.0.0.0 0.0.0.0 221.1.1.1

R２

acl number 2000

rule 5 permit

nat address-group 1 111.1.1.3 111.1.1.10

#

interface GigabitEthernet0/0/1

ip address 111.1.1.2 255.255.255.0

nat outbound 2000 address-group 1

＃

ip address 10.1.0.2 255.255.255.255

#

ospf 1 router-id 10.1.0.2

default-route-advertise

area 0.0.0.0

network 10.1.0.2 0.0.0.0

network 10.1.200.5 0.0.0.0

#

ip route-static 0.0.0.0 0.0.0.0 111.1.1.1

核心CORE

DHCP　ｅｎａｂｌｅ　／／開啟ｄｈｃｐ

vlan batch 200 to 203

ip pool fenchang1

gateway-list 10.1.10.254

network 10.1.10.0 mask 255.255.255.0

excluded-ip-address 10.1.10.201 10.1.10.253

dns-list 202.99.192.66

#

ip pool fenchang2

gateway-list 10.1.20.254

network 10.1.20.0 mask 255.255.255.0

excluded-ip-address 10.1.20.201 10.1.20.253

dns-list 114.114.114.114

＃

interface Vlanif200

ip address 10.1.200.2 255.255.255.252

#

interface Vlanif201

ip address 10.1.200.6 255.255.255.252

#

interface Vlanif202

ip address 10.1.200.9 255.255.255.252

dhcp select global

#

interface Vlanif203

ip address 10.1.200.13 255.255.255.252

dhcp select global

#

interface GigabitEthernet0/0/1

port link-type access

port default vlan 200

#

interface GigabitEthernet0/0/2

port link-type access

port default vlan 201

#

interface GigabitEthernet0/0/3

port link-type trunk

port trunk allow-pass vlan 202

#

interface GigabitEthernet0/0/4

port link-type trunk

port trunk allow-pass vlan 203

＃ospf 1

area 0.0.0.0

network 10.1.200.2 0.0.0.0

network 10.1.200.6 0.0.0.0

area 0.0.0.1

network 10.1.200.9 0.0.0.0

area 0.0.0.2

network 10.1.200.13 0.0.0.0

分廠１的匯聚SW

ｄｈｃｐ　ｅｎａｂｌｅ　　　／／開啟DHCP

vlan batch 10 202

interface Vlanif10

ip address 10.1.10.254 255.255.255.0

dhcp select relay

dhcp relay server-ip 10.1.200.9

#

interface Vlanif202

ip address 10.1.200.10 255.255.255.252

interface GigabitEthernet0/0/1

port link-type trunk

port trunk allow-pass vlan 202

#

interface GigabitEthernet0/0/2　　　　／／用的ｈｙｂｒｉｄ口

port hybrid pvid vlan 10

port hybrid untagged vlan 10

＃

ospf 1 router-id 10.1.0.4

area 0.0.0.1

network 10.1.10.0 0.0.0.255

network 10.1.0.4 0.0.0.0

network 10.1.200.10 0.0.0.0

分廠２的匯聚SW

vlan batch 20 203

ｄｈｃｐ　ｅｎａｂｌｅ　　　／／開啟DHCP

#

interface Vlanif20

ip address 10.1.20.254 255.255.255.0

dhcp select relay

dhcp relay server-ip 10.1.200.13

#

interface Vlanif203

ip address 10.1.200.14 255.255.255.252

＃interface GigabitEthernet0/0/1

port link-type trunk

port trunk allow-pass vlan 203

#

interface GigabitEthernet0/0/2

port link-type access

port default vlan 20

＃

interface LoopBack0

ip address 10.1.0.5 255.255.255.255

#

ospf 1 router-id 10.1.0.5

area 0.0.0.2

network 10.1.0.5 0.0.0.0

network 10.1.20.0 0.0.0.255

network 10.1.200.14 0.0.0.0