PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
10.2.5.4.2
Config-Aborted State
When entering the Config-Aborted State, a timer is started and an interrupt is
generated. The S/UNI-IMA-8 will stay in the config aborted state until either:
1) The management plane restarts the group using the Restart_Group
Command. The restart can be done with either the same parameters or with
different parameters.
2) The config-abort timeout expires.
10.2.5.4.3
Start-up-Ack State
When entering the Start-up-Ack State, a timer is started. In the Start-up-Ack state,
the S/UNI-IMA-8 waits for the FE to report the Start_Up_Ack state. If the timer
expires prior to the FE-reporting Start_Up_Ack (or insufficient links, blocked, or
operational states), the S/UNI-IMA-8 transitions back into the Start_Up state.
Otherwise, when the FE reports Start-up-Ack, the S/UNI-IMA-8 transitions to the
Insufficient Links state.
10.2.5.4.4
Insufficient Links
When in the Insufficient Links state, the Start_LASR command should be
executed to start the LASR procedure to bring up additional links
The LASR procedure starts two timers; one for the Tx links and one for the Rx
links.
When the LASR procedure is complete (all links become active or timeout), if
sufficient links are active, the group state machine transitions into the Operational
State unless the Group is Blocked.
If sufficient links are not active after the LASR procedure completes, an interrupt
is generated. Since links will only transition into the Active state via a LASR
procedure, plane management can activate a new LASR procedure with the
same set of links and/or with additional links to bring up the group.
10.2.5.4.5
Blocked and Operational States
While in the Blocked and Operational States, the link state machines are
monitored to ensure that sufficient links stay active. If insufficient links are
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