13
Field Description
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, including
UP
,
DOWN
, and
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
Type
Link type of the interface:
•
A
—
Access
•
H
—
Hybrid
•
T
—
Trunk
PVID
Default VLAN ID of the interface.
Cause
Causes for the physical state of an interface to be DOWN. For more information,
Table 6
Causes for the physical state of an interface to be DOWN
Field Description
Not connected
No physical connection exists (possibly because the network cable is
disconnected or faulty).
