S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
13.5.3 Adding a Group
Prior to issuing this command, the RX_LINK_EN bits and TX_LINK_EN bits in the RIPP Link
Context should be checked to make sure they are zero (this indicates that, if these links were
previously in another group, the previous delete link operation is complete). Then, the Group
and Link configuration should be performed. Next, the Add_Group command should be issued.
This command will initiate the Group and Link State Machines. Is starts the GSM arbitration
and automatically starts a LASR procedure.
The Add_Group command continues after the CMD_ACK is returned. The completion of the
command is generally indicated by an event that indicated either that the process timed-out or
the group has become operational. If a timeout occurs, PM should take appropriate action and
either restart the group with new parameters or add additional links to the group.
The event that indicates that the Add_Group command has completed successfully is either the
GTSM_INT with the GTSM state = Operational or GSM_INT with the GSM state =
Operational.
Events that indicate that the Add_Group command has completed but was not successful are the
following:
NE_ABORT_INT
FE_ABORT_INT
GROUP_TIMEOUT_INT
FE_TIMEOUT_INT
Events that indicate that individual links are experiencing problems and did not become active
are the following:
DIFF_DELAY_INT
INVALID_ICP_INT
RX_TIMEOUT_INT
TX_TIMEOUT_INT
In order to track the progress of the command, interrupts may be enabled for GSM state changes
and for the LSM state changes for all of the links. This may result in a large number of events if
the group includes a large number of links.
If the TRL link is not validated on the RX side, since the group does not have a valid TRL, the
group will not come up and will report GROUP_TIMEOUT_INT, and FE_TRL_STATUS
should remain zero. This will occur when the receive physical link corresponding to the far end
transmit TRL LID is not connected.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
282
PMC [ PMC-SIERRA, INC ]
