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iFPaf4,WA3510X如何做流量统计

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问题描述:

WA3510X如何做流量统计

组网及组网描述:


6小时前提问

配置与其它网络设备没有特别之处

6小时前回答

暂无

跟交换机一样



流量统计就是通过与类关联,对符合匹配规则的流进行统计,统计报文数或字节数。是排查丢包和不通类问题的手段。例如,可以统计从某个源IP地址发送的报文,然后管理员对统计信息进行分析,根据分析情况采取相应的措施。

如图所示组网,PCA访问PCB web业务无法访问成功,怀疑网络中存在丢包,使用流量统计,确认丢包位置。在大型网络中通过流量统计也可以缩小故障范围。PCA的IP为1.1.1.1,PCB的IP为2.2.2.2。

定义acl,匹配PCA访问PCB的流量计,在做流量统计时应尽量保证匹配的情况精确,避免抓取到其他业务流量,使流量统计不准确。

[H3C]acl number 3333

[H3C-acl-adv-3333]description traffic accounting for host A to host B

[H3C-acl-adv-3333]rule 10 permit tcp source 1.1.1.1 0.0.0.0 destination 2.2.2.2 0.0.0.0 destination-port eq 80

定义流分类,匹配acl定义的PCA访问PCB的web流量。

[H3C]traffic classifier traffic_accounting_from_A_to_B

[H3C-classifier-traffic_accounting_from_A_to_B]if-match acl 3333

定义流行为,统计报文个数

[H3C]traffic behavior traffic_accounting_from_A_to_B

[H3C-behavior-traffic_accounting_from_A_to_B]accounting packet

定义qos策略,关联流分类和流行为

[H3C]qos policy traffic_accounting_from_A_to_B

[H3C-qospolicy-traffic_accounting_from_A_to_B]classifier traffic_accounting_from_A_to_B behavior traffic_accounting_from_A_to_B

在2/0/1的入方向和2/0/2的出访问下发qos策略,来统计报文是否到达设备和是否被设备转发给PCB。

[H3C]interface GigabitEthernet2/0/1

[H3C-GigabitEthernet2/0/1]qos apply policy traffic_accounting_from_A_to_B inbound

[H3C]interface GigabitEthernet2/0/2

[H3C-GigabitEthernet2/0/2]qos apply policy traffic_accounting_from_A_to_B outbound

使PCA访问PCB,查看接口GigabitEthernet2/0/1流量统计结果

[H3C]display qos policy interface GigabitEthernet 2/0/1

  Interface: GigabitEthernet2/0/1

  Direction: Inbound

  Policy: traffic_accounting_from_A_to_B
   Classifier: traffic_accounting_from_A_to_B
     Operator: AND
     Rule(s) : If-match acl 3333
     Behavior: traffic_accounting_from_A_to_B
      Accounting Enable:
        5 (Packets)

根据结果看出有5个报文进行交换机。查看接口GigabitEthernet2/0/2流量统计结果

[H3C]display qos policy interface GigabitEthernet 2/0/2

  Interface: GigabitEthernet2/0/2

  Direction: Outbound

  Policy: traffic_accounting_from_A_to_B
   Classifier: traffic_accounting_from_A_to_B
     Operator: AND
     Rule(s) : If-match acl 3333
     Behavior: traffic_accounting_from_A_to_B
      Accounting Enable:
        5 (Packets)

有5个报文从交换机发出,说明从A到B转发正常。

使用相同方式对反方向做流量统计,同时查看结果。

[H3C]acl number 3334

[H3C-acl-adv-3334]description traffic accounting for host B to host A

[H3C-acl-adv-3334]rule 10 permit tcp source 2.2.2.2 0.0.0.0 source-port eq 80 destination 1.1.1.1 0.0.0.0

定义流分类,匹配acl定义的PCA访问PCB的web流量。

[H3C]traffic classifier traffic_accounting_from_B_to_A

[H3C-classifier-traffic_accounting_from_B_to_A]if-match acl 3334

定义流行为,统计报文个数

[H3C]traffic behavior traffic_accounting_from_B_to_A

[H3C-behavior-traffic_accounting_from_B_to_A]accounting packet

定义qos策略,关联流分类和流行为

[H3C]qos policy traffic_accounting_from_B_to_A

[H3C-qospolicy-traffic_accounting_from_B_to_A]classifier traffic_accounting_from_B_to_A behavior traffic_accounting_from_B_to_A

在2/0/2的入方向和2/0/1的出访问下发qos策略,来统计报文是否到达设备和是否被设备转发给PCB。

[H3C]interface GigabitEthernet2/0/1

[H3C-GigabitEthernet2/0/1]qos apply policy traffic_accounting_from_B_to_A outbound

[H3C]interface GigabitEthernet2/0/2

[H3C-GigabitEthernet2/0/2]qos apply policy traffic_accounting_from_B_to_A inbound

使用display qos policy interface查看流量统计结果

[H3C]display qos policy interface GigabitEthernet 2/0/1

  Interface: GigabitEthernet2/0/1

  Direction: Outbound

  Policy: traffic_accounting_from_B_to_A
   Classifier: traffic_accounting_from_B_to_A
     Operator: AND
     Rule(s) : If-match acl 3334
     Behavior: traffic_accounting_from_B_to_A
      Accounting Enable:
        5 (Packets)

[H3C]display qos policy interface GigabitEthernet 2/0/2

  Interface: GigabitEthernet2/0/2

  Direction: Inbound

  Policy: traffic_accounting_from_B_to_A
   Classifier: traffic_accounting_from_B_to_A
     Operator: AND
     Rule(s) : If-match acl 3334
     Behavior: traffic_accounting_from_B_to_A
      Accounting Enable:
        5 (Packets)

通过以上结果可以看出交换机反向转发正常,在交换机上没有丢包。

关键配置如下

acl number 3333 
 description traffic accounting for host A to host B
 rule 10 permit tcp source 1.1.1.1 0 destination 2.2.2.2 0 destination-port eq www
acl number 3334
 description traffic accounting for host B to host A
 rule 10 permit tcp source 2.2.2.2 0 source-port eq www destination 1.1.1.1 0
#
traffic classifier traffic_accounting_from_A_to_B operator and
 if-match acl 3333
traffic classifier traffic_accounting_from_B_to_A operator and
 if-match acl 3334
#
traffic behavior traffic_accounting_from_A_to_B
 accounting packet
traffic behavior traffic_accounting_from_B_to_A
 accounting packet
#
qos policy traffic_accounting_from_A_to_B
 classifier traffic_accounting_from_A_to_B behavior traffic_accounting_from_A_to_B
qos policy traffic_accounting_from_B_to_A
 classifier traffic_accounting_from_B_to_A behavior traffic_accounting_from_B_to_A
#
interface GigabitEthernet2/0/1
 qos apply policy traffic_accounting_from_A_to_B inbound
 qos apply policy traffic_accounting_from_B_to_A outbound
#
interface GigabitEthernet2/0/2
 qos apply policy traffic_accounting_from_B_to_A inbound
 qos apply policy traffic_accounting_from_A_to_B outbound

注意事项

1、对匹配的流量计一定要尽量精确,避免其他流量影响统计结果。

2、注意流量双向性和qos策略下发的方向要正确下发。

6小时前回答

暂无

1、snmp

2、sflow


5小时前回答

暂无

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