9
Interface Link Cause
WLAN-BSS1 DOWN Not connected
Table 3
display interface brief command output description
Field Description
The brief information of
interface(s) under route
mode:
The command displays brief information about Layer 3 interfaces.
Link: ADM -
administratively down;
Stby - standby
ADM—The interface has been shut down by the network administrator. To
recover its physical layer state, perform the
undo shutdown
command.
Stby—The interface is a standby interface. You can use the
display standby state
command to check the corresponding primary interface.
Protocol: (s) - spoofing
If the network layer protocol state of an interface is shown as UP, but its link is an
on-demand link or not present at all, its protocol attribute includes the spoofing
flag (an
s
in parentheses). This attribute is typical of interface Null 0 and the
loopback interfaces.
Interface Interface
name.
Link
Physical link state of the interface:
•
UP—The link is up.
•
DOWN—The link is physically down.
•
ADM—The link has been administratively shut down. To recover its physical
state, perform the
undo shutdown
command.
•
Stby—The interface is a standby interface.
Protocol
Protocol connection state of the interface, which can be UP, DOWN, or UP(s).
The brief information of
interface(s) under bridge
mode:
Brief information about Layer 2 interfaces.
Speed or Duplex: (a)/A -
auto; H - half; F - full
If the speed of an interface is automatically negotiated, its speed attribute
includes the auto negotiation flag, letter a in parentheses.
If the duplex mode of an interface is automatically negotiated, its duplex mode
attribute includes the following options:
•
(a)/A—Auto negotiation.
•
H—Half negotiation.
•
F—Full negotiation.
Type: A - access; T - trunk;
H - hybrid
Link type options for Ethernet interfaces.
Speed
Interface rate, in bps.
Duplex
Duplex mode of the interface:
•
A—Auto-negotiation.
•
F—Full duplex.
•
F(a)—Auto-negotiated full duplex.
•
H—Half duplex.
•
H(a)—Auto-negotiated half duplex.