交换机丢包查找

看下接口下面有没有错包，把接口flow-interval改成5S，display interface 观察下 5s流量百分比，一般超过80%可能会存在丢包，不知道你监控监控的那个节点，一般监控监控的丢包都不可信

dis int link-info   看以下接口速率及错误包，如果这个命令不知此那么用下面的两个命令

dis counters rate inbound interface g2/0/2

dis counters rate outbound interface g2/0/2

如果还查不出来，做以下流量统计，看一下哪里丢包

用流统计或者debug ip icmp 确定丢在哪台设备哪个端口，
配置：

System-view
#
acl number 3000
rule 0 permit icmp source 192.168.1.1 0 destination 192.168.1.3 0
rule 0 permit icmp source 192.168.1.3 0 destination 192.168.1.1 0
#
traffic classifier 1
if-match acl 3000
#
traffic behavior 1
accounting packet
#
qos policy 1
classifier 1 behavior 1
#
interface Ethernet1/0/1
qos apply policy 1 inbound
qos apply policy 1 outbound
#
Interface Ethernet1/0/2
qos apply policy 1 outbound
qos apply policy 1 inbound
#

在192.168.1.1 ping 192.168.1.3 4个包

C:\Windows\System32>ping 192.168.1.3

正在 Ping 192.168.1.3 具有 32 字节的数据:

来自 192.168.1.3 的回复: 字节=32 时间=2ms TTL=255

来自 192.168.1.3 的回复: 字节=32 时间=1ms TTL=255

来自 192.168.1.3 的回复: 字节=32 时间=1ms TTL=255

来自 192.168.1.3 的回复: 字节=32 时间=1ms TTL=255

查看端口的统计信息结果

[H3C]dis qos policy interface Ethernet 1/0/1

Interface: Ethernet1/0/1

Direction: Inbound

Policy: 1

Classifier: 1

Operator: AND

Rule(s) : If-match acl 3000

Behavior: 1

Accounting Enable:

4 (Packets)

Direction: Outbound

Policy: 2

Classifier: 2

Operator: AND

Rule(s) : If-match acl 3001

Behavior: 2

Accounting Enable:

4 (Packets)

[H3C]dis qos policy interface Ethernet 1/0/2

Interface: Ethernet1/0/2

Direction: Inbound

Policy: 2

Classifier: 2

Operator: AND

Rule(s) : If-match acl 3001

Behavior: 2

Accounting Enable:

4 (Packets)

Direction: Outbound

Policy: 1

Classifier: 1

Operator: AND

Rule(s) : If-match acl 3000

Behavior: 1

Accounting Enable:

4 (Packets)