以前好好的,然后 2台交换机之间一根专线被电信挖断了,现在就出现这个时不时会断的节奏,好无奈 核心上没有出现的报错信息,但2层上有报错Jul 12 11:48:18: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port GigabitEthernet1/0/25 on VLAN0050.Jul 12 14:42:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEt...