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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
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Enable AAL5 FBTC: AAL5 Frame Basic Traffic Control: To enable the possibility of
discarding the whole frame, not just one non-compliant cell. This is used to set the Early Packet
Discard bit at every node along a connection.
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Policing Model: When a connection is added, a VPI.VCI address is assigned, and UPC
parameters are configured for the connection. For each cell in an ATM stream, the VPI.VCI
addresses are verified and each cell is checked for compliance with UPC parameters.
• CAC & Rate Parameters
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ECR Enable: Equivalent Cell Rate. The CAC (Connection Admission Control) algorithm
calculates the ECR of a connection prior to establishing the connection, and ensures high
efficiency of network resources.
Note If ECR is enabled, CWM will calculate %utilization using the CAC_calc.txt file. The ECR for
Enhanced CAC is allowed only for BXM, ASI and AUSM cards for PVC connections. Therefore
%utilization becomes a greyed out, and the user is not able to enter values in this data field.
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Utilization(%): Is the bandwidth allocation for rt/nrt (real time/ non real time). For Vbr, Cbr,
and Ubr it’s PCR%Util; for Abr it’s MCR%Util. Range: 0-100%.
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MCR(cps): Minimum Cell Rate- The minimum VC queue service rate for an ABR ATM
connection.
• Connection Descriptor
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The connection descriptor is independently configurable at each end of a connection. Character
Limitations: None. Range: The Descriptor field will take any number of characters, but will
only display 64. To activate the Connection Descriptor feature, the following configuration
steps will need to be followed. Using the command line interface (CLI) as user svplus:
a. cd/usr/users/svplus/conf
b. vi CwmDomainGlobal.conf
# Cwm Global Across the Domain Configuration File
# <Name> = <Value>
DESCRIPTOR_FLAG=0 (on=1, off=0)
c. Change the flag to 1 (on)
d. write and quit the file (:wq!)
e. Stop and restart the CWM core.
• Routing Parameters
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Avoid Trunk Type: This type is applicable only when a connection involves multiple routing
nodes. Routing is not involved when a connection originates and terminates on the same routing
node. That is, when originating and terminating endpoints are using the same routing node, this
parameter is not applicable and is made insensitive. (Greyed out).
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Reroute Priority: This type is applicable only when a connection involves multiple routing
nodes. Routing is not involved when a connection originates and terminates on the same routing
node. That is, when originating and terminating endpoints are using the same routing node, this
parameter is not applicable and is made insensitive. (Greyed out).
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Enable Cell Routing: Enables Cell Routing on a connection.