非等价负载均衡

目的：

让 5.5.5 .0/24 到 4.4.4.0/24 路由： R5 － R2 － R1 － R4

让 25.0.0.0/24 到 4.4.4 .0/24 路由： R5 － R2 － R3 － R4

因为默认状态下跌幅： R5 － R2 － R1 － R4

第一步：全网互通

R5#traceroute

Protocol [ip]:

Target IP address: 4.4.4 .4

Source address: 5.5.5 .5

Numeric display [n]:

Timeout in seconds [3]:

Probe count [3]:

Minimum Time to Live [1]:

Maximum Time to Live [30]:

Port Number [33434]:

Loose, Strict, Record, Timestamp, Verbose[none]:

Type escape sequence to abort.

Tracing the route to 4.4.4 .4

 

  1 25.0.0.2 168 msec 216 msec 144 msec

  2 12.0.0 .1 240 msec 216 msec 360 msec

  3 14.0.0 .4 456 msec 576 msec *

 

R5#traceroute

Protocol [ip]:

Target IP address: 4.4.4 .4

Source address: 25.0.0.5

Numeric display [n]:

Timeout in seconds [3]:

Probe count [3]:

Minimum Time to Live [1]:

Maximum Time to Live [30]:

Port Number [33434]:

Loose, Strict, Record, Timestamp, Verbose[none]:

Type escape sequence to abort.

Tracing the route to 4.4.4 .4

 

  1 25.0.0.2 144 msec 120 msec

  2 12.0.0 .1 216 msec 264 msec 216 msec

  3 14.0.0 .4 444 msec *  392 msec

第二步：用 route-map 在 R2 上做非等价负载均衡

R2(config)#access-list 1 permit 25.0.0.5

R2(config)#route-map PBR permit 10

R2(config-route-map)#match ip add 1

R2(config-route-map)#set ip next-ho p 23.0.0 .3

R2(config)#route-map PBR permit 20

R2(config)#

R2(config)#

R2(config)#int f 0/0

R2(config-if)#ip policy route-map PBR

第三步：在 R2 是查看配制

R2#sh ip policy

Interface      Route map

Fa0/0          PBR

 

R2#sh access-lists

Standard IP access list 1

    10 permit 25.0.0.5

 

R2#sh route-map

route-map PBR, permit, sequence 10

  Match clauses:

    ip address (access-lists): 1

  Set clauses:

    ip next-ho p 23.0.0 .3

  Policy routing matches: 0 packets, 0 bytes

route-map PBR, permit, sequence 20

  Match clauses:

  Set clauses:

  Policy routing matches: 0 packets, 0 bytes

第四步：用 traceroute 命令进行测试

R5#traceroute

Protocol [ip]:

Target IP address: 4.4.4 .4

Source address: 5.5.5 .5

Numeric display [n]:

Timeout in seconds [3]:

Probe count [3]:

Minimum Time to Live [1]:

Maximum Time to Live [30]:

Port Number [33434]:

Loose, Strict, Record, Timestamp, Verbose[none]:

Type escape sequence to abort.

Tracing the route to 4.4.4 .4

 

  1 25.0.0.2 136 msec 132 msec 156 msec

  2 12.0.0 .1 288 msec 288 msec 216 msec

  3 14.0.0 .4 408 msec *  480 msec

R5#traceroute

Protocol [ip]:

Target IP address: 4.4.4 .4

Source address: 25.0.0.5

Numeric display [n]:

Timeout in seconds [3]:

Probe count [3]:

Minimum Time to Live [1]:

Maximum Time to Live [30]:

Port Number [33434]:

Loose, Strict, Record, Timestamp, Verbose[none]:

Type escape sequence to abort.

Tracing the route to 4.4.4 .4

 

  1 25.0.0.2 216 msec 144 msec 144 msec

  2 23.0.0 .3 216 msec 264 msec 312 msec

  3 34.0.0.4 384 msec *  456 msec