S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
The PM Active and PM Address fields are used to select Performance Management entries to be
associated with a particular VC. Their function is fully described in Section 10.14 on PM
processing.
The VPC Pointer Active and VPC Pointer fields are used to associate a VCC record entry with a
VPC record entry when VCCs are being aggregated to, or split out from a VPC. All connections
that are NOT VCCs being aggregated to, or split out from VPCs must have their VPC Pointer
Active bit set to logic 0. The function of the VPC pointer is more fully described in Sections
10.10 and 10.11 on F4 to F5 and F5 to F4 OAM processing. Note that, if active, the 2 least
significant bits of the VPC Pointer cannot be equal to the 2 LSBs of the VC Record Address.
Failure to adhere to this restriction will result in the connection being treated as inactive.
The PHYID field indicates the Physical Layer device that this connection is associated with. This
field is used to determine the destination of all generated AIS, CC, RDI, LB, and PM cells. This
field is also used in determining per-PHY statistics and per-PHY policing. If it is not the same as
the PHYID of cells on the connection, proper operation cannot be guaranteed.
10.4 VC Record Table
The VC Record Table is a 7-row data structure which contains context information for one
connection. The VC Table is comprised of 64K VC Table records stored in internal DRAM, one
record for each of the 64K connections. The VC Table is used for connection configuration and
connection processing functions. Unused bits within the table should be set to logic zero for
future backward compatibility.
Table 8 VC Record Table
Row
127
Action 2
(2)
0
2
0 Read-
Only
Inc 2
(14)
Limit 2
(14)
Action 1
(2)
Inc 1
(14)
Limit 1
(14)
Field B
(12)
VPI
VCI
(16)
Bwds VCRA VC Table
(12)
(16)
CRC-10 (10)
Config
1
Status
(10)
Configuration OAM
(14)
Internal
Policing
Reserved Maximum
GFR State
Policing
ETE Received Segment
Configuration Status
Configuration (16)
(11)
Frame Length (3)
Reserved
(3)
Defect Type
(8)
Received
Defect Type
(8)
Status &
Config
(23)
(21)
(11)
2 Counting Alternate Count 2 (32)
Alternate Count 1 (32)
Count 2 (32)
Count 1 (32)
3
Unused Remaining Frame Count Non-Compliant Count 3 Non-Compliant Count 2 Non-Compliant Count 1 TAT2 (34)
(1) (11) (16) (16) (16)
TAT1 (34)
Policing
4 Trans-
lation
Unused Translated VPI (12)
(4)
Translated VCI (16)
Translated HEC (8)
Translated UDF (24)
Translated Pre/Po 1
(32)
Translated Pre/Po 2
(32)
5 Seg DL Segment Received Defect Location (128)
6 ETE DL End-to-End Received Defect Location (128)
The fields of the VC table are described in the following sections.
10.5 Cell Processing
After a VPI/VCI search has been completed for a cell, the resulting actions are dependent upon
the cell contents and the VC Table Record. Particular features such as policing and OAM cell
processing can be disabled on a global and per-connection basis.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
80
PMC [ PMC-SIERRA, INC ]
