H3C Technologies H3C WA2600 Series WLAN Access Points - Manual (Page 20)

4-10
z The interface is shut down by the administrator.
z LCP negotiation fails.
Execute the display interface command to check the state of the interface. The output information can
be:
z serial number is administratively down, line protocol is down , which indicates that the
interface is shut down by the administrator.
z serial number is down, line protocol is down , which indicates that the interface is not activated
or the physical layer has not gone up yet.
z serial number is up, line protocol is up , which indicates that LCP negotiation succeeded.
z serial number is up, line protocol is down , which indicates that the interface is active, but LCP
negotiation failed.