Filter
Top Products
4-28
Cisco WAN Manager User’s Guide
Version 10.5, Part Number 78-12945-01 Rev. D0, August 2003
Chapter 4 Connection Manager
PVC Connections Supported by Release 10 of CWM
–
Time Between Fwd RM Cells
–
Transient Buffer Exposure(TBE): The number of RM cells that can be sent out by a virtual
source before waiting for a BRM cell in return.
–
Fixed Round Trip Time (in microseconds): The amount of delay expected for an RM cell to
travel through the network to the destination and back again.
–
per-VC Weighted Fair Queuing (WFQ): Weighted Fair Queuing is an approximation of the
Generalized Processor Sharing (GPS) scheduling. WFQ can be generally used to give
performance guarantees to connections carrying best-effort packet traffic, where each
connection can be guaranteed bandwidth in proportion to its weight and in a fair manner.
• SCT Cosb Parameters
–
Cosb Number: Class of Service Buffer Number. The number that identifies one of the sixteen
Cosb buffers. A Cosb buffer is a buffer that services connections with similar QoS requirements.
Range and units:1-16.
–
Cosb MinRate: This field is no longer used and is currently always set to its default value (0).
Range and units: 1- 1000000.
–
Cosb MaxReservableRate: This field is no longer used and is currently always set to its default
value (100). Range and units: 1- 1000000.
–
Min Priority: The priority at which this COSB will be serviced to guarantee it minimum and
maximum bandwidth requirements. Highest priority = 0; Lowest priority = 15. Range and units:
0-15.
–
Excess Priority: The priority at which this COSB will be given access to excess bandwidth.
Highest priority = 0; Lowest priority = 15. Range and units: 0-15.
–
Cosb Max Threshold: Class of Service Buffer Maximum Threshold. This value is a percentage
of MAX_CELL THRESH. 1000000 is equal to 100%. Range and values: 0-1000000.
–
Cosb CLP (1) High Threshold: Class of Service Buffer Cell Loss Priority. This value is a
percentage of MAX_CELL THRESH. 1000000 is equal to 100%. Range and values: 0-1000000.
–
Cosb EPD (0) Threshold: Class of Service Buffer Early Packet Discard Threshold. The
maximum threshold for CLP (0+1) cells. This value is a percentage of the MAX_CELL
THRESH for the connection. 1000000 is equal to 100%. Range and value: 0-1000000.
–
EFCI Threshold: Explicit Forward Congestion Indication. The VC EFCI discard threshold. This
value is a percentage of MAX_CELL THRESH. 1000000 is equal to m100%. Range and values:
0-1000000.
–
Explicit Rate Stamping: Indicates whether Explicit Rate Stamping (ERS) is enabled or disabled.
Range and units: 1=enabled; 2=disabled.
–
Random Early Discard Selection(RED): RED will drop packets from queues on a random basis
in order to avoid buffer overflow. RED is accomplished by dropping packets on a random basis,
which is determined statistically, when the mean queue depth exceeds a threshold over a period
of time, effectively advising the packet source router to decrease its packet rate.
–
Random Early Discard Threshold: The threshold at which the COSB Random Early Discard
(RED) is activated. This threshold is a percentage of the MAX_CELL THRESH for the
connection. 1000000 is equal to 100%. Range and units: 0-1000000.
–
Random Early Discard Probability Factor: The mantissa value of probability for maximum
discard when RED is activated. Determined as 1/2^<value>.