Pictured above is the basic condition of our unit network topology of his paintings, I don't know whether accurate, coming from the superior a mobile line and a unicom line, respectively by a router, the router has two cables between the interconnect, router, respectively, after the firewall, below two firewalls have two cables connected directly, below each pick a switch, firewall has two network interconnection between two switches, two core under the exchange took some switches, each point of the two switches also has two network interconnection,
Because of grassroots line operator often appear problem, we will be more testing found that the problem in time, my computer is on the floor switches, can through SSH login at a lower level switches, due to the lower network interconnection between two switches, instant a operator lines appear problem, can also use other operators logged on,
So want to ask, is there a efficient and simple method to detect carrier line if you have any questions,