RMT shows the current state of the Ring Management state machine, which controls the following features and facilities:
MAC availability
Detection and resolution of duplicate addresses
Identification of stuck beacon and initiation of trace
Table 2-2 lists the states that may be returned by pf_stat under the RMT heading.
Table 2-2 pf_stat States Under the RMT Heading
State |
Meaning |
ISOLATED |
RMT is inactive (initial state). |
NON_OP |
RMT is waiting for an operational ring. |
RING_OP |
RMT is operating normally. |
DETECT |
RMT is checking for duplicate addresses (transient state during initialization). |
NON_OP_DUP |
RMT has detected that its address is duplicated and is initiating recovery. The ring is not operational in this state. |
RING_OP_DUP |
RMT has detected that the MAC address is duplicated and flagged the error. The ring is operational in this state. |
DIRECTED |
RMT has been beaconing for an extended period of time and is transmitting a stream of directed beacons prior to initiating recovery. |
TRACE |
RMT has initiated a trace to recover a stuck beacon. |