System information

Troubleshooting FDDI
Book Title
5-74
Field Description
Fddi is {up | down |
administratively down}
Gives the interface processor unit number and tells whether the interface hardware is
currently active and can transmit and receive or whether it has been taken down by an
administrator.
line protocol is
{up | down}
Indicates whether the software processes that handle the line protocol consider the
interface usable.
Hardware Provides the hardware type, followed by the hardware address.
Internet address IP address, followed by subnet mask.
MTU Maximum transmission unit of the interface.
BW Bandwidth of the interface in kilobits per second.
DLY Delay of the interface in microseconds.
rely Reliability of the interface as a fraction of 255 (255/255 is 100 percent reliability),
calculated as an exponential average of over five minutes.
load Load on the interface as a fraction of 255 (255/255 is completely saturated),
calculated as an exponential average of over five minutes.
Encapsulation Encapsulation method assigned to interface.
loopback Indicates whether loopback is set.
keepalive Indicates whether keepalives are set.
ARP type Type of Address Resolution Protocol assigned.
FDX Displays full-duplex information. Values are not supported and supported. When
the value is supported, the display indicates whether full-duplex is enabled or
disabled. When enabled, the state of the FDX negotiation process is displayed. The
negotiation states only relate to the full-duplex negotiation process. You must also
ensure that the interface is up and working by looking at other fields in the show
interfaces fddi command such as line protocol and —. Negotiation states are
• idle—Interface is working but not in full-duplex mode yet. If persistent, it could
mean that the interface did not meet all negotiation conditions (for example, there
are more than two stations in the ring).
• request—Interface is working but not in full-duplex mode yet. If persistent, it
could mean that the remote interface does not support full-duplex or full-duplex is
not enabled on the interface.
• confirm—Transient state.
• operation—Negotiations completed successfully, and both stations are operating
in full-duplex mode.
Phy-{A | B} Lists the state the Physical A or Physical B connection is in; one of the following: off,
active, trace, connect, next, signal, join, verify, or break.