PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
• Rx Physical links that are in the group
TX LID to Link Mapping Table:
• Select the LIDs to be used by the TX Links and program the
physical links into the appropriate Group Tag/LID locations.
TIMA Group Configuration Record:
• TX VPHY ID
• Stuff Advertise Mode
• Actual stuffing mode(ITC/CTC)
• Transmitted OAM label.
RDAT IMA Group Context Record
• RX VPHY ID
Also, while configuring a group, the context records that contain statistics should
be initialized. The following records should be initialized to zero:
RIPP group Context Record,
RDAT IMA Group Statistics Record,
Transmit IMA Group Context Record.
12.4.3.2
Configuring a Link for IMA
All link-based records are indexed by the physical link ID.
Prior to configuring a link, the user should check to ensure that it is not in use
already. This is necessary since link deletion from a group may take some time
due to the necessity of allowing the DCB buffer for the link to drain. Reading the
RX_ENABLE bit in the RIPP RX Link context record and the TX_ENABLE bit in
the RIPP TX Link Context record can check this.
The following fields in the following records need to be programmed; other fields
in the records should be cleared to zero.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
266
PMC [ PMC-SIERRA, INC ]
