6800/6820/6300设备都有哪些实用的诊断命令？

可以配置流量统计。流统计无法匹配到做了隧道封装的报文的内层IP头部。也无法将报文抓到交换机的CPU。

流统计命令参考如下：

//使用ACL抓取对应的流量。

acl number 3555

rule permit icmp source 10.100.2.5 0 destination 10.100.1.2 0

acl number 3666 

rule permit icmp source 10.100.1.2 0 destination 10.100.2.5 0

//使用classifier匹配下流量

traffic classifier 1 operator and

if-match acl 3555

traffic classifier 2 operator and

if-match acl 3666

//定义流统计

traffic behavior 1

accounting

traffic behavior 2

accounting

//定义QOS policy

qos policy 1

 classifier 1 behavior 1

qos policy 2

 classifier 2 behavior 2

//在对应的接口上应用

interface GigabitEthernet1/0/1

qos apply policy 1 inbound

qos apply policy 2 outbound

[H3C-GigabitEthernet1/0/1]dis qos po int g1/0/1

  Interface: GigabitEthernet1/0/1

  Direction: Inbound

  Policy: 1

   Classifier: 1

     Operator: AND

     Rule(s) : If-match acl 3555

     Behavior: 1

      Accounting Enable:

        5957 (Packets)