基本QOS配制

 

三、第一章：基本QOS实验

1.1、使用优先级排队实现QOS

实验图如下

 

R1配置	R2配置
host Host_1 no ip domain-lookup line con 0 logging sy exec-time 0 0 int f0/0 duplex full ip add 192.168.1.2 255.255.255.0 no sh exit ip route 0.0.0.0 0.0.0.0 192.168.1.1	host Host_2 no ip domain-lookup line con 0 logging sy exec-time 0 0 int f0/0 duplex full ip add 192.168.1.3 255.255.255.0 no sh exit ip route 0.0.0.0 0.0.0.0 192.168.1.1
R3配置	R7配置
host Singapore no ip domain-lookup line con 0 logging sy exec-time 0 0 int f0/0 duplex full ip add 192.168.1.1 255.255.255.0 exit int s1/2 ip add 200.200.100.1 255.255.255.0 cl ra 56000 no sh ip route 0.0.0.0 0.0.0.0 200.200.100.2	host ISP no ip domain-lookup line con 0 logging sy exec-time 0 0 int s1/2 ip add 200.200.100.2 255.255.255.0 no sh int s1/3 ip add 200.200.50.1 255.255.255.0 cl ra 56000 no sh ip route 0.0.0.0 0.0.0.0 200.200.50.2
R4配置
host WebServer no ip domain-lookup line con 0 logging sy exec-time 0 0 int s1/2 ip add 200.200.50.2 255.255.255.0 no sh ip route 0.0.0.0 0.0.0.0 200.200.50.1

配制完以上后，我们就可以在R3和R7的s1/2端口上的队列机制是什么

用show int s1/2显示如下

Singapore#show int s1/2

Serial1/2 is up, line protocol is up

 Hardware is M4T

 Internet address is 200.200.100.1/24

 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

 Encapsulation HDLC, crc 16, loopback not set

 Keepalive set (10 sec)

 Restart-Delay is 0 secs

 Last input 00:00:08, output 00:00:05, output hang never

 Last clearing of "show interface" counters never

 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

 Queueing strategy: weighted fair

 Output queue: 0/1000/64/0 (size/max total/threshold/drops)

     Conversations 0/0/256 (active/max active/max total)

     Reserved Conversations 0/0 (allocated/max allocated)

     Available Bandwidth 1536 kilobits/sec

 

正如上面所示，如果未加任何策略，在带宽低于2.048M（E1）速率的时缺省的队列模式为WFQ。如果在高于E1速率时缺省的队列模式为FIFO。

下面我们开始配制策略

R3：

 

Singapore(config)#access-list 101 permit tcp any any eq 80

Singapore(config)#access-list 102 permit ip any any

Singapore(config)#priority-list 1 protocol ip high list 101

Singapore(config)#priority-list 1 protocol ip medium list 102

Singapore(config)#int s1/2

Singapore(config-if)#priority-group 1

R7：

ISP(config)#access-list 101 permit tcp any any eq 80

ISP(config)#access-list 102 permit ip any any

ISP(config)#priority-list 1 protocol ip high list 101

ISP(config)#priority-list 1 protocol ip medium list 102

ISP(config)#int s1/2

ISP(config-if)#priority-group 1

 

 

验证

R3：

Singapore#show queueing priority

Current DLCI priority queue configuration:

Current priority queue configuration:

 

List   Queue Args

1      high   protocol ip          list 101

1      medium protocol ip          list 102

 

Singapore#show queueing interface s1/2

Interface Serial1/2 queueing strategy: priority

 

Output queue utilization (queue/count)

        high/213 medium/0 normal/40 low/0

Singapore#show int s1/2

Serial1/2 is up, line protocol is up

 Hardware is M4T

 Internet address is 200.200.100.1/24

 MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

 Encapsulation HDLC, crc 16, loopback not set

 Keepalive set (10 sec)

 Restart-Delay is 0 secs

 Last input 00:00:02, output 00:00:00, output hang never

 Last clearing of "show interface" counters never

 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

 Queueing strategy: priority-list 1

 Output queue (queue priority: size/max/drops):

     high: 0/20/0, medium: 0/40/0, normal: 0/60/0, low: 0/80/0

本文转自zcm8483 51CTO博客，原文链接:http://blog.51cto.com/haolun/993008