1. From the picture above, we can see that the status of the interface is Administratively Down. We know that this indicates that the interface is disabled.
Then we ask the customer set us the diagnostic information, and the following information about the interface G5/0/0 can be seen which means this interface is shutdown by the customer.
port link-type access
port access vlan 1051
anti-ddos flow-statistic enable
anti-ddos server-flow-statistic enable
So we give the following solution:
In the page “ System -> Configuration -> Interface”, click the corresponding interface GigabitEthernet5/0/0, and cancel the selecting “Silent interface”. The following picture is the example, need to cancel the “ ”.
2. After that, the customer replied that the interface was still down, and sent yet another diagnostic file. From this, the following information
Interface-1 Interface-2 BYPASS-Switch
5/0/0 5/0/1 switch
5/0/2 5/0/3 switch
The default configuration is like this picture(for example):
But from the diagnostic file, the current configuration is as following:
This means the option “Status Swithover” is enable. The meaning of this parameter is shown in the following table:
Then we ask the customer to cancel select the option “Status Swithover”. After that, the interface G5/0/0 is up.