流量管制和整形配置案例

案例配置拓扑:
在这里插入图片描述
2 案例配置需求
1、 根据拓扑配置IP,
2、 在五台路由器之间运行OSPF协议,发布直连网段和环回口;
3、 在R3上对1.1.1.1去往4.4.4.4的数据做流量管制,设置CIR为8000,BE和BC为1000;
4、 在R3上对2.2.2.2去往5.5.5.5的数据做流量整形,设置CIR为8000,BE和BC为1000;

案例配置思路
1.根据拓扑配置IP地址

R1:
interface Loopback0
 ip address 1.1.1.1 255.255.255.0
 ip ospf network point-to-point
 interface Serial1/1
 ip address 13.1.1.1 255.255.255.0
 serial restart-delay 0

R2:
interface Loopback0
 ip address 2.2.2.2 255.255.255.0
 ip ospf network point-to-point
 interface Serial1/2
 ip address 23.1.1.1 255.255.255.0
 
R3:
interface Loopback0
 ip address 3.3.3.3 255.255.255.0
 interface Serial1/1
 ip address 13.1.1.2 255.255.255.0       
interface Serial1/2
 ip address 23.1.1.2 255.255.255.0
interface Serial1/4
 ip address 34.1.1.2 255.255.255.0
interface Serial1/5
 ip address 35.1.1.2 255.255.255.0
 
R4:
interface Loopback0
 ip address 4.4.4.4 255.255.255.0
 ip ospf network point-to-point
 interface Serial1/4
 ip address 34.1.1.1 255.255.255.0

R5:
interface Loopback0
 ip address 5.5.5.5 255.255.255.0
 ip ospf network point-to-point
 interface Serial1/5
 ip address 35.1.1.1 255.255.255.0
 

2.配置OSPF协议

R1:
router ospf 100
 router-id 91.1.1.1
 log-adjacency-changes
 network 1.1.1.0 0.0.0.255 area 0
 network 13.1.1.0 0.0.0.255 area 0

R2:
router ospf 100
 router-id 92.2.2.2
 log-adjacency-changes
 network 2.2.2.0 0.0.0.255 area 0
 network 23.1.1.0 0.0.0.255 area 0

R3:
router ospf 100
 router-id 93.3.3.3
 log-adjacency-changes
 network 13.1.1.0 0.0.0.255 area 0
 network 23.1.1.0 0.0.0.255 area 0
 network 34.1.1.0 0.0.0.255 area 0
 network 35.1.1.0 0.0.0.255 area 0

R4:
router ospf 100
 router-id 94.4.4.4
 log-adjacency-changes
 network 4.4.4.0 0.0.0.255 area 0
 network 34.1.1.0 0.0.0.255 area 0

R5:
router ospf 100
 router-id 95.5.5.5
 log-adjacency-changes
 network 5.5.5.0 0.0.0.255 area 0
 network 35.1.1.0 0.0.0.255 area 0
 

3.在R3配置流量管制

access-list 100 permit ip host 1.1.1.1 host 4.4.4.4	
class-map match-all 1-4					/创建类图/
 match access-group 100
policy-map 1-4							/创建策略图/
 class 1-4									/调用类图/
  police cir 8000 bc 1000 be 1000 conform-action transmit exceed-action drop			/流量管制,速率为8000 bit,BC为1000,Be为1000,正常流量传输,超出流量丢弃/

4.在R3配置流量整形

access-list 101 permit ip host 2.2.2.2 host 5.5.5.5	
class-map match-all 2-5
 match access-group 101								
policy-map 2-5
 class 2-5
  shape average 8000 1000 1000
/做流量整形,承诺速率为8000bit,BC为1000,Be为1000,超出的流量缓存/

案例配置结果
1、 配置完成后,用1.1.1.1去ping 4.4.4.4,包大小为分别为1000 byte、500byte、300byte:
在这里插入图片描述2、 配置完成后,用R2的2.2.2.2ping 5.5.5.5,包大小为 1000 byte:
在这里插入图片描述3、 配置完成后,在R3上查看整形策略集:

R3#show policy-map interface serial 1/2
 Serial1/2 

  Service-policy output: 2-5

    Class-map: 2-5 (match-all)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: access-group 101
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/0/0
      (pkts output/bytes output) 0/0
      shape (average) cir 8000, bc 1000, be 1000
      target shape rate 8000

    Class-map: class-default (match-any)
      56 packets, 13588 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: any 
      
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/0/0
      (pkts output/bytes output) 56/13648

4、 配置完成后,用R2的2.2.2.2ping 5.5.5.5,包大小为 2001 byte:
在这里插入图片描述案例总结及其它
1、 流量管制和流量整形使用令牌桶计算流量是否出现拥塞;
2、 令牌桶的参数有承诺速率CIR、添加令牌数量BC、第二个桶速率BE;
3、 管制会将超出令牌桶的流量直接丢弃;
4、 整形会将超出令牌桶的流量缓存起来,知道可用带宽足够时继续传输;
5、 整形的缓存空间是有限的,当数据包大小超过限制时,数据可能被丢弃;

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转载自blog.csdn.net/qinshangwy/article/details/105041794
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