
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
PM7341 S/UNI-IMA-84
DATASHEET
PMC-2000223
ISSUE 4
INVERSE MULTIPLEXING OVER ATM
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
297
RDAT Link Statistics Memory (MEM_SELECT=0)
Purpose: Stores cell and event counts for each Physical Link.
Usage: TC Links and links in IMA Groups. Each word contains two counts for
IMA links, one count for TC Links. In IMA mode, each cell may cause the
oif_anomalies count to be incremented, and also may cause one and only one of
the other counters to be incremented. In TC mode, each cell will cause one and
only one counter to be incremented. All counters roll over unless otherwise
noted.
Maintained by: RDAT.
Record Size: Four 32-bit words.
MEM_ADDR = (Physical Link Number X 4) + Word Offset
Table 20
RDAT Link Statistics Record (IMA)
Word
Bits
Parameter
Description
0
31:16
stuff_events
Count of the number of stuff events
received on this link.
15:0
oif_anomalies
Count of the number of times this link has
transitioned from the IMA Sync state to
the IMA Hunt state in the IFSM.
31:16
icp_violations
Count of HEC errored, OCD errored,
invalid, or missing ICP cells received on
this link. This also includes valid ICP
cells received at unexpected positions.
1
15:0
icp_cells
Count of the number of valid, non-errored
ICP cells received on this link.
31:16
filler_cells
Count of the number of non-errored filler
cells received on this link that have been
written to the buffer.
2
15:0
user_cells
Count of the number of user cells
received on this link that have been
written to the buffer.