Specifications

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Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Chapter 7 Switch Operating Procedures
Managing Service Class Templates
Table 7-25 describes the SCT General Parameters shown in the example.
Table 7-25 Service Class Template: SCT General Parameters
Parameter Range Description
SERV-TYPE The service type (for example, CBR, VBR, ABR) to which the
parameters (for example, COSB_NUM, CAC_TYPE, UPC_ENB) in
this table apply.
COSB_NUM 1 to 16 Class of Service Buffer Number. The number that identifies one of the
sixteen CoS buffers. A CoS buffer is a buffer that services connections
with similar QoS requirements.
CAC_TYPE Connection Admission Control. Used by an ATM switch during setup to
determine if a connections requested QoS conforms to the guaranteed
QoS standards for ATM connections.
LCN_CAC: Logical Connection Number CAC
B_CAC: Basic - CAC
E_CAC: Enhanced - CAC
UPC_ENB Usage Parameter Control Enable. Enables or disables GCRA policing
functions on the connection.
GCRA1-ENB: Enables GCRA1 only.
GCRA 1 and 2: Enables both GCRA1 and GCRA2.
CLP-SELEC 1 to 4 Cell Loss Priority Select. Specifies whether a bucket will police for CLP
(0+1) or CLP (0) in the dual leaky bucket policing action.
1 - Bucket 1: CLP (0+1) - Bucket 2: CLP (0)
2 - Bucket 1: CLP (0+1) - Bucket 2: CLP (0+1)
3 - Bucket 1: CLP (0+1) - Bucket 2: Disabled
4 - Bucket 1: CLP (0+1) with Maximum Frame Size (MFS)
GCRA-1 Generic Cell Rate Algorithm – Bucket 1. In ATM, an algorithm that
defines conformance with respect to the traffic contract of the
connection. For each cell arrival, the GCRA determines whether the cell
conforms to the traffic contract.
Note If UPC-Enable is set to disable, this object is not used.
Choose one of the following options to indicate how cells failing the first
policer bucket should be handled:
1 - Discard
2 - Set CLP bit
3 - Set CLP of untagged cells, discard tagged cells.