LS-5048PV5-EI

情况说明：

全局

loopback-detection global enable vlan 1 to 4094

loopback-detection global action shutdown

loopback-detection interval-time 10

具体端口配置

interface GigabitEthernet2/0/19

port-security intrusion-mode disableport-temporarily

port-security max-mac-count 1

port-security port-mode autolearn

loopback-detection enable vlan 1 to 4094

loopback-detection action shutdown

如下图，在G2/0/19口下连傻瓜式交换机并引入环路，但是过了很长时间display loopback-detection，显示并没有检测到环路，而且G2/0/19口没down掉

后来在G2/0/19端口上添加了stp loop-protection及storm-constrain配置，当G2/0/19环路时仍没有down，配置如下：

interface GigabitEthernet2/0/19

 storm-constrain broadcast ratio 75 50

 storm-constrain multicast ratio 75 50

 storm-constrain unicast ratio 75 50

 storm-constrain control shutdown

 flow-interval 5

 stp loop-protection

 port-security intrusion-mode disableport-temporarily

 port-security max-mac-count 1

 port-security port-mode autolearn

 loopback-detection enable vlan 1 to 4094

 loopback-detection action shutdown

麻烦帮忙看一下什么问题？