System information

Troubleshooting FDDI
Book Title
5-76
ECM is... ECM is the SMT entity coordination management, which overlooks the operation of
CFM and PCM. The ECM state can be one of the following:
• out—Router is isolated from the network.
• in—Router is actively connected to the network. This is the normal state for a
connected router.
• trace—Router is trying to localize a stuck beacon condition.
• leave—Router is allowing time for all the connections to break before leaving the
network.
• path_test—Router is testing its internal paths.
• insert—Router is allowing time for the optical bypass to insert.
• check—Router is making sure optical bypasses switched correctly.
• deinsert—Router is allowing time for the optical bypass to deinsert.
CFM is... Contains information about the current state of the MAC connection. The
configuration management state can be one of the following:
• isolated—MAC is not attached to any Physical type.
• wrap_a—MAC is attached to Physical A. Data is received on Physical A and
transmitted on Physical A.
• wrap_b—MAC is attached to Physical B. Data is received on Physical B and
transmitted on Physical B.
• wrap_s—MAC is attached to Physical S. Data is received on Physical S and
transmitted on Physical S. This is the normal mode for a SAS.
— is... — (ring management) is the SMT MAC-related state machine. The — state can be
one of the following:
• isolated—MAC is not trying to participate in the ring. This is the initial state.
• non_op—MAC is participating in ring recovery, and ring is not operational.
• ring_op—MAC is participating in an operational ring. This is the normal state
while the MAC is connected to the ring.
• detect—Ring has been nonoperational for longer than normal. Duplicate address
conditions are being checked.
• non_op_dup—Indications have been received that the address of the MAC is a
duplicate of another MAC on the ring. Ring is not operational.
• ring_op_dup—Indications have been received that the address of the MAC is a
duplicate of another MAC on the ring. Ring is operational in this state.
• directed—MAC is sending beacon frames notifying the ring of the stuck
condition.
• trace—Trace has been initiated by this MAC, and the — state machine is waiting
for its completion before starting an internal path test.
token rotation Token rotation value is the default or configured rotation value as determined by the
fddi token-rotation-time command. This value is used by all stations on the ring.
The default is 5,000 microseconds. For FDDI full-duplex, this indicates the value in
use prior to entering full-duplex operation.
negotiated Actual (negotiated) target token rotation time.
ring operational When the ring is operational, the displayed value will be the negotiated token rotation
time of all stations on the ring. Operational times are displayed by the number of
hours/minutes/seconds the ring has been up. If the ring is not operational, the
message “ring not operational” is displayed.
Configured tvx Transmission timer.
Field Description