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PM7324

SATURN USER NETWORK INTERFACE ATM LAYER SOLUTION

PMC-Sierra 

S/UNI-ATLAS

DATASHEET

PMC-1971154

1.1 Policing

ISSUE 7

PM7324 S/UNI-ATLAS

S/UNI-ATM LAYER SOLUTION

• Policing is performed in the ingress direction for adherence to peak cell rate (PCR), cell delay

variation tolerance (CDVT), sustained cell rate (SCR) and burst tolerance (BT). Violating cells

can be noted, dropped or tagged.

• Policing is performed using the virtual scheduling Generic Cell Rate Algorithm (GCRA)

described in ITU-T I.371.

• Two policing instantiations available per VC. The policed cell streams can be any combination

of user cells, OAM cells, Resource Management, high priority cells or low priority cells.

• Per-PHY policing may also be enabled. Each of 32 PHY devices may have a single leaky

bucket enabled, in addition to the dual leaky bucket of the connection. Violating cells can be

noted (counted only), dropped or tagged.

1.2 Cell Counting

• Counts maintained on a per-VC basis include total low priority cells, total high priority cells

and cells violating the traffic contract. Per-VC counts are maintained for both the ingress and

egress directions.

• Counts maintained on a per-PHY basis (in both the Ingress and Egress directions) include:

number of CLP0 cells received, number of CLP1 cells received, number of OAM cells

received, number of RM cells received, number of errored OAM cells, number of errored RM

cells, number of cells with unassigned/invalid VPI/VCI/PTI and the number of cells received

with a non-zero GFC (ingress UNI only).

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC AND FOR ITS CUSTOMERS’ INTERNAL USE 5

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