S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Table 4 PM command description
Command
Add_group
Description
Starts up a group state machine and the link state machines for the
links configured in the group. Group and links need to be configured
prior to issuing this command. As a result of this command, the
transmitter will start to send out IMA frames on the links specified as
part of the group, and the receiver will start to look for and analyze
ICP cells received on the links within the group. If a sufficient number
of links are detected to be active, the group will transition to the
operational state and start to transmit and receive ATM traffic.
Delete_group
Remove an existing group and all its links immediately. This
command will take the group state machine to the “not configured”
state and all of the links in the group to the “not in group” state. The
transmit links will cease to transmit IMA frames and will commence to
transmit physical-layer idle cells until the links are reused. For group
deletion without any loss of data, the links may be deleted or inhibited
to stop traffic on the group or the group may be inhibited prior to
deleting the group.
Restart_group
Inhibit_group
Restart the specified group. When executed, the GSM goes back to
“start-up” state and all tx links return to the “unusable” state and the
Rx links return to the “unusable” state but report “Not in Group” since
the LID is not yet validated. This command is intended to enable the
change of parameters during the group start-up phase and to provide
a local group reset for other conditions.
Set the internal group inhibiting status flag. Once a group is
considered inhibited, it will go to BLOCKED state instead of the
OPERATIONAL state when sufficient links exist in the group.
If the group is already in OPERATIONAL state when the command is
issued, the GSM will go to BLOCKED state, and thus block the TX
data path. However, the RX data path remains on.
Not_inhibit_group
Start_LASR
Clear the internal group inhibiting status. If the group is currently in
BLOCKED state, the GSM will go to OPERATIONAL state.
Start LASR procedure on one or more links. The links involved may
either be new links or existing links with a failure/fault/inhibiting
condition. If the group configuration is symmetric, links should be
added in both the TX and RX direction.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
71
PMC [ PMC-SIERRA, INC ]
