QoS实验配置详解

QoS---CQ （定制队列）

学习CQ（定制队列）的配置；本实验首先用ACL定义一些流量。然后再将这些流量进行先后排队，最后将排好队的流量策略应用到接口上

1 过滤流量

R2(config)#access-list 101 permit ospf any any
R2(config)#access-list 101 permit eigrp any any
R2(config)#access-list 102 permit ip any 192.168.0.1 0.0.0.0
R2(config)#access-list 102 permit ip host 192.168.0.1 any  
R2(config)#access-list 103 permit tcp any host 192.168.0.1 eq 23
R2(config)#access-list 103 permit tcp any host 192.168.0.1 eq 21
R2(config)#access-list 103 permit tcp any host 192.168.0.1 eq 20

R2(config)#access-list 104 permit udp any lt 200 any lt 200
R2(config)#access-list 104 permit tcp any range 135 139 any range 135 139

R2(config)#access-list 105 permit udp any range 16333 35252 any range 16333 35252  

2 队列排序

R2(config)#queue-list 1 protocol ip 1 list 101  // 将与List101匹配的流量排在第一位
R2(config)#queue-list 1 protocol ip 2 list 102
R2(config)#queue-list 1 protocol ip 3 list 103
R2(config)#queue-list 1 protocol ip 4 list 104
R2(config)#queue-list 1 protocol ip 5 list 105

3 将CQ应用到接口

R2(config)#int s0
R2(config-if)#custom-queue-list 1             // 将这个定制好的队列应用到接口上

4 检验

R2#sh queueing                                             // 查看队列
Current fair queue configuration:

  Interface           Discard    Dynamic  Reserved  Link    Priority
                      threshold  queues   queues    queues  queues
  BRI0                64         16       0         8       1   
  BRI0:1              64         16       0         8       1   
  BRI0:2              64         16       0         8       1   
  Serial1             64         256      0         8       1   

Current DLCI priority queue configuration:
Current priority queue configuration:
Current custom queue configuration:

List   Queue  Args
1      1      protocol ip          list 101
1      2      protocol ip          list 102
1      3      protocol ip          list 103
1      4      protocol ip          list 104
1      5      protocol ip          list 105

 

QoS---PQ1

1 将udp协议的16333端口至35252端口都设为低优先级

2 将rip设为高优先级

 

R1(config)#priority-list 1 protocol ip low list 100           // 建立优先级列表1，将与access-list 100匹配的流量设为低优先级

R1(config)#access-list 100 permit udp any range 16333 35252 any range 16333 35252   //range 命令是设定一个端口范围

R1(config)#priority-list 1 protocol ip high udp rip
R1(config)#int s0
R1(config-if)#priority-group 1                                // 将优先级列表1应用到接口S0上

 

2 验证

R1#sh queueing
Current fair queue configuration:

  Interface           Discard     Dynamic      Reserved
                      threshold   queue count  queue count
  Serial1             64          256          0   

Current priority queue configuration:

List   Queue  Args
1      low    protocol ip          list-100
1      high   protocol ip          udp port rip

 

R1#sh ip int s0
Serial0 is administratively down, line protocol is down
  Internet protocol processing disabled
R1#sh int s0
Serial0 is administratively down, line protocol is down
  Hardware is HD64570
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set
  Keepalive set (10 sec)
  Last input never, output 01:37:44, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 159
  Queueing strategy: priority-list 1
  Output queue (queue priority: size/max/drops):
     high: 0/20/0, medium: 0/40/0, normal: 0/60/159, low: 0/80/0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets put, 52588119 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     0 packets, 52588444 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     0 output buffer failures, 0 output buffers swapped out
     6 carrier transitions
     DCD=down  DSR=down  DTR=down  RTS=down  CTS=down

 

QoS----PQ2

1 将主机192.168.0.1设为最高优先级

2 将192.168.0.0/24网段下的其他主机设为中等优先级

3 将所有http流量设为普通优先级

4 将所有ftp流量设为低优先级

配置如下：

R1(config)#priority-list 2 protocol ip high list 2                 // 建立优先级列表2 ，将与access-list 2匹配的流量定为高优先级
R1(config)#access-list 2 permit 192.168.0.1 0.0.0.0
R1(config)#priority-list 2 protocol ip medium list 3
R1(config)#access-list 3 deny 192.168.0.1 0.0.0.0
R1(config)#access-list 3 permit 192.168.0.0 0.0.0.255

R1(config)#priority-list 2 protocol ip normal tcp www

R1(config)#priority-list 2 protocol ip low tcp ftp
R1(config)#priority-list 2 protocol ip low tcp ftp-data

R1(config)# int s1
R1(config-if)# priority-group 2                                         // 在接口S1上应用该优先级列表

R1#sh queueing                                                              // 查看队列
Current fair queue configuration:
Current priority queue configuration:

List   Queue  Args
2      high   protocol ip              list 2
2      medium protocol ip          list 3
2      normal protocol ip            tcp port www
2      low    protocol ip               tcp port ftp
2      low    protocol ip               tcp port ftp-data

 

QoS---CBWFQ （基于类分配带宽）

CBWFQ （基于类分配带宽）基本配置

实验要求：给上一个实验所定义的3种流量，QQ，SMTP，FTP分配不同的带宽

1 定义流量 （直接调用上一个实验的配置）

R4(config)#class-map QQ
R4(config-cmap)#match access-group name QQ                   // 匹配一个名为QQ的命名ACL
R4(config-cmap)#exi
R4(config)#ip access-list extended QQ
R4(config-ext-nacl)#permit ip any 61.172.240.0 0.0.0.255
R4(config-ext-nacl)#permit udp any any eq 4000         
R4(config-ext-nacl)#permit udp any any eq 8000
R4(config-ext-nacl)#exi

R4(config)#class-map smtp
R4(config-cmap)#match access-group 100
R4(config-cmap)#exi
R4(config)#access-list 100 permit tcp any any eq smtp

R4(config)#class-map ftp
R4(config-cmap)#match access-group 101
R4(config-cmap)#exi
R4(config)#access-list 101 permit tcp any any eq 20
R4(config)#access-list 101 permit tcp any any eq 21

2 定义策略

R4(config)#policy-map CBWFQ
R4(config-pmap)#class QQ
R4(config-pmap-c)#bandwidth percent 5                       // 为类型为QQ的流量分配百分之五的带宽
R4(config-pmap)#class smtp
R4(config-pmap-c)#bandwidth percent 25
R4(config-pmap)#class ftp
R4(config-pmap-c)#bandwidth percent 20
R4(config-pmap-c)#exi

3 应用到接口上

R4(config)#int s0
R4(config-if)#service-policy output CBWFQ

4 验证

R4# sh policy-map                                         // 查看策略
  Policy Map wy
    Class QQ
     police cir 10000 bc 1500
       conform-action drop
       exceed-action drop
    Class smtp
     police cir 10000 bc 1500
       conform-action drop
       exceed-action drop
    Class ftp
     police cir 10000 bc 1500
       conform-action drop
       exceed-action drop

  Policy Map CBWFQ
    Class QQ
      Bandwidth 5 (%) Max Threshold 64 (packets)
    Class smtp
      Bandwidth 25 (%) Max Threshold 64 (packets)
    Class ftp
      Bandwidth 20 (%) Max Threshold 64 (packets)