----------------------------------------------------------------------------------------------------------------------R0:
Enable
Conf t
Int s0/0
Ip add 100.0.0.2255.255.255.252
No shu
Int s0/1
Ip add 200.0.0.2255.255.255.252
No shut
Exit
Int loopback 1
Ip add 2.2.2.2255.255.255.255
R1:
Ip add 100.0.0.1255.255.255.252
Ip add 200.0.0.1255.255.255.252
Int f1/0
Ip add192.168.0.1 255.255.255.252
Access-list 1permit 192.168.10.0 0.0.0.255
Access-list 2permit 192.168.20.0 0.0.0.255
route-map loadpermit 10
match ip address1
set interfaceSerial0/0
route-maploadpermit 20
match ip address2
set interfaceSerial0/1
route-map cisco1permit 10
match ip address 1
match interface Serial0/0
route-map cisco2permit 10
route-map cisco3permit 10
match ip address 2
match interface Serial0/1
route-map cisco4permit 10
ip nat insidesource route-map cisco1 interface Serial0/0 overload
ip nat insidesource route-map cisco2 interface Serial0/1 overload
ip nat insidesource route-map cisco3 interface Serial0/1 overload
ip nat insidesource route-map cisco4 interface Serial0/0 overload
ip policyroute-map load
Int f1/0
Ip nat inside
Ip nat outside
ip route 0.0.0.00.0.0.0 100.0.0.2
ip route 0.0.0.00.0.0.0 200.0.0.2
ip route192.168.10.0 255.255.255.0 192.168.0.2
ip route192.168.20.0 255.255.255.0 192.168.0.2
SW1:
Vlan database
Vlan 10
Vlan 20
Int f0/0
No switchport
Ip add 192.168.0.2 255.255.255.252
Int vlan 10
Ip add 192.168.10.254 255.255.255.0
Int vlan 20
Ip add 192.168.20.254 255.255.255.0
Ip dhcp pool vlan10
Network 192.168.10.0 255.255.255.0
Default-gateway 192.168.10.254
Ip dhcp pool vlan20
Network 192.168.20.0 255.255.255.0
Default-gateway 192.168.20.254
Int f0/1
Sw a vlan 10
Int f0/2
Sw a vlan 20
Ip route 0.0.0.0 0.0.0.0 192.168.0.1
PC1:
No ip routing
Ip add dhcp
PC2:
Ip add dhcp
----------------------------------------------------------------------------------------------------------------------
先從PC1和PC2上面分别都跟蹤一下路由，看是否起到負載均衡的效果。（看到這種效果就OK了）
把R1的S0/0或S0/1斷掉在從PC機跟蹤路由看是否起到備份的效果
Down掉S0/0口
Down掉S0/1口
這樣既做到了負載均衡又起到了備份的作用！
我試過了，搭好環境直接把指令複制進去就能成功，注意一定要把端口連接配接對了！
Access-list 1permit 192.168.10.0 0.0.0.255----------------------------------定義ACL
route-map loadpermit 10 ----------------------------------定義route-map政策名字随便寫（load）
match ip address1 ----------------------------------比對前邊定義的ACL
set interfaceSerial0/0 ----------------------------------比對端口
route-map cisco1permit 10 ----------------------------------定義政策
match ip address 1 ----------------------------------比對ACL
match interface Serial0/0 --------------------------------跟蹤端口的狀态（UP/DOWN）
match ip address 1 ----------------------------------這個隻比對ACL就可以了
route-map cisco3permit 10 -----------------------------------下邊這倆和上邊那倆一個意思，隻是比對的ACL和跟蹤的端口不一樣了
如果S0/0端口狀态正常則把cisco1在S0/0端口上做端口複用
如果S0/0端口狀态故障則把cisco2在S0/1端口上做端口複用（其實cisco1和cisco2比對的一個ACL）
如果S0/1端口狀态正常則把cisco3在S0/1端口上做端口複用
如果S0/1端口狀态故障則把cisco4在S0/0端口上做端口複用（其實cisco3和cisco4 比對的是一個ACL）
ip policy route-mapload ----------------------将route-map政策綁定到接口
Int f1/0 ------------------------定義内外接口
ip route 0.0.0.00.0.0.0 100.0.0.2 -----------------------添加預設路由