1-6
Field Description
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 auto negotiation flag, letter
a
in parentheses or a capital
A
.
Letter
H
indicates the half duplex mode, and letter
F
indicates the full duplex
mode.
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
Type
Link type of the interface:
A – access
H – hybrid
T – trunk
PVID Default VLAN ID of the interface
Cause
Causes why the physical state of an interface is DOWN.
Table 1-2 provides the
details.
Table 1-2 Causes why the physical state of an interface is DOWN
Field Description
Not connected
No physical connection exists (possibly because the network cable is
disconnected or faulty).