H3C 环路检测

交换机以太网端口回环测试功能包括内部环回测试和外部环回测试：

内部环回测试：在交换机芯片端口自检进行测试，用以定位端口相关功能是否出现故障。

外部回环测试：以太网端口上接了一个自环头，从端口发出的报文通过自环头又回到了该端口，



开启内环监测命令：

sys

[h3c] interface ethernet1/0/1

[h3c-ethernet1/0/1] loopback internal




开启外环监测命令：

sys

[h3c] interface ethernet1/0/1

[h3c-ethernet1/0/1] loopback external



针对外部环路侦测并处理的配置：

sys

[h3c] loopback-detection enabal #全局开启交换机外部环测试，如果要单独开启某个端口，先进入该端口执行命令，端口列表在 enable前面加数字。

[h3c] loopback-detection interval-time 60 #设置环回监测时间 为 60 s，默认为30s



例子：端口1开启外部环监测，出现故障并自动关闭该端口

sys

[h3c] loopback-detection enable

[h3c] interface ethernet1/0/1

[h3c-Ethernet1/0/1] loopback-detection enable

[h3c-Ethernet1/0/1] loopback-detection interval-time 60

[h3c-Ethernet1/0/1] loopback-detection shutdown enable

以上端口是默认的access端口处理



如果端口是trunk和hbrid型：

sys

[h3c] loopback-detection enable

[h3c] interface ethernet1/0/1

[h3c-Ethernet1/0/1] port link-type trunk

[h3c-Ethernet1/0/1] loopback-detection enable

[h3c-Ethernet1/0/1] loopback-detection control enable
[h3c-Ethernet1/0/1] loopback-detection interval-time 60

[h3c-Ethernet1/0/1] loopback-detection shutdown enable



如果是需要开起端口所属vlan进行的环监测并处理

sys

[h3c] loopback-detection enable

[h3c] interface ethernet1/0/1

[h3c-Ethernet1/0/1] loopback-detection enable
[h3c-Ethernet1/0/1] port link-type trunk

[h3c-Ethernet1/0/1] loopback-detection per-vlan enable
[h3c-Ethernet1/0/1] loopback-detection interval-time 60

[h3c-Ethernet1/0/1] loopback-detection shutdown enable