服务质量-Qos(Quality of Service)

一、场景设置：

 

普通用户来自195.1.1.0/24的流量占用15%,优先用户来自195.1.2.0/24的流量占用30%,假设VOICE流量IP Precedence值为Critical, 他们占用45%的带宽,其他应用占用剩余的带宽,不要为剩余流量创建Class，在router的S0/0的出方向做配置。

 

二、网络拓扑：

 

 

三、具体配置：

 

1、Router1的基本配置：

 

Router(config)#hostname Router1
Router1(config)#interface ethernet 0/0
Router1(config-if)#ip address 195.1.1.1 255.255.255.0
Router1(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up
Router1(config-if)#exit
Router1(config)#interface ethernet 0/1
Router1(config-if)#ip address 195.1.2.1 255.255.255.0
Router1(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Ethernet0/1, changed state to up
Router1(config-if)#exit
Router1(config)#interface serial 0/0
Router1(config-if)#ip address 10.10.10.1 255.255.255.252
Router1(config-if)#clock rate 64000
Router1(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial0/0, changed state to up
%LINK-3-UPDOWN: Interface Serial0/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
Router1(config-if)#exit
Router1(config)#router rip
Router1(config-router)#network 195.1.1.0
Router1(config-router)#network 195.1.2.0
Router1(config-router)#network 10.0.0.0
Router1(config-router)#exit
%LINK-3-UPDOWN: Interface Serial0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
Router1(config)#exit

Router1#ping 10.10.10.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Router1#ping 192.168.10.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

 

2、Router2的基本配置：

 

Router(config)#hostname Router2
Router2(config)#interface ethernet 0/0
Router2(config-if)#ip address 192.168.10.1 255.255.255.0
Router2(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up
Router2(config-if)#exit
Router2(config)#interface serial 0/0
Router2(config-if)#ip address 10.10.10.2 255.255.255.252
Router2(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial0/0, changed state to up
Router2(config-if)#exit
Router2(config)#router rip
Router2(config-router)#network 192.168.10.0
Router2(config-router)#network 10.0.0.0
Router2(config-router)#exit
Router2(config)#exit
Router2#ping 10.10.10.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Router2#ping 195.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 195.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Router2#ping 195.1.2.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 195.1.2.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

 

3、在Router1上实现Qos：

 

Router1(config)# access-list 20 permit 195.1.1.0 0.0.0.255
Router1(config)# access-list 21 permit 195.1.2.0 0.0.0.255

Router1(config)#class-map match-all common-users

Router1(config-cmap)# match access-group 20
Router1(config-cmap)#exit

Router1(config)#class-map match-all special-users
Router1(config-cmap)# match access-group 21
Router1(config-cmap)#exit
Router1(config)#class-map match-all voice-traffic

Router1(config-cmap)# match ip precedence 5

Router1(config-cmap)#exit
Router1(config)# policy-map Qos
Router1(config-pmap)#class common-users
Router1(config-pmap-c)# bandwidth per 15
Router1(config-pmap-c)#exit
Router1(config-pmap)#class special-users
Router1(config-pmap-c)# bandwidth per 30
Router1(config-pmap-c)#exit
Router1(config-pmap)#class voice-traffic
Router1(config-pmap-c)# bandwidth per 45
Router1(config-pmap-c)#exit
Router1(config-pmap)#exit
Router1(config)# interface serial 0/0

Router1(config-if)# service-policy output Qos
Router1(config-if)#exit
Router1(config)#exit
Router1#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]

 

4、在Router1验证其配置：

 

*Router1# show running-config
Building configuration...

!
Version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Router1
!
!
!
ip subnet-zero
!
class map match-all common-users
  Match access-list 20
class map match-all special-users
  Match access-list 21
class map match-all voice-traffic
  Match ip precedence 5
!
policy map qos
 class common-users
  bandwidth percent 15
 class special-users
  bandwidth percent 30
 class voice-traffic
  bandwidth percent 45

!
interface Serial0/0
 ip address 10.10.10.1 255.255.255.252
 no ip directed-broadcast
 clock rate 64000
 backup interface
!
interface Ethernet0/0
 ip address 195.1.1.1 255.255.255.0
 no ip directed-broadcast
 bandwidth 10000
 backup interface
 no fair-queue
!
interface Ethernet0/1
 ip address 195.1.2.1 255.255.255.0
 no ip directed-broadcast
 bandwidth 10000
 backup interface
 no fair-queue
!
!
router rip
 network 195.1.1.0
 network 195.1.2.0
 network 10.0.0.0
!

ip classless
no ip http server
access-list 20 permit 195.1.1.0 0.0.0.255
access-list 21 permit 195.1.2.0 0.0.0.255
!
!
!
line con 0
 transport input none
line aux 0
line vty 0 4
!
no scheduler allocate
end

 

*Router1#show policy-map

  Policy Map qos
    Class common-users
      Weighted Fair Queueing
            Bandwidth 15 (%) Max Threshold 64 (packets)
    Class special-users
      Weighted Fair Queueing
            Bandwidth 30 (%) Max Threshold 64 (packets)
    Class voice-traffic
      Weighted Fair Queueing
            Bandwidth 45 (%) Max Threshold 64 (packets)