Table 8-13 Grooming Metric Selection; Table 8-14 Parameters For Cnfrteoptthresh Command - Cisco MGX 8850 (PXM1E/PXM45) Configuration Manual

Chapter 8 Managing PNNI Nodes and PNNI Routing

Table 8-13 Grooming Metric Selection

Connection Configured Metric
Max. Cost
No
No
No
No
Yes
Yes
Yes
Yes
The grooming operation uses both the percentage and absolute thresholds to determine if a prospective
new route is better than the incumbent route. If the new route meets both criteria, the connection is
rerouted. For example, if the incumbent connection cost is 1000, the absolute threshold is 100 and the
percentage reduction is 5, the connection will be rerouted only if the new connection cost is less than or
equal to 900. To calculate the cost reduction based on the absolute threshold, subtract 100 from the
incumbent connection cost of 1000. To calculate the reduction based on the percentage threshold,
multiply the connection cost by 5 percent (1000*5/100 = 50). Because the absolute threshold metric
requires the larger cost reduction in this example, the absolute threshold of 100 is used to determine if
rerouting should take place.
To set the grooming thresholds used for scheduled and manual grooming, enter the cnfrteoptthresh
command as follows:
M8850_LA.7.PXM.a > cnfrteoptthresh <type> [-awcbr <value>] [-awrtvbr <value>]
[-awnrtvbr <value>] [-awubr <value>] [-awabr <value>] [-ctdcbr <value>]
[-ctdrtvbr <value>] [-cdvcbr <value>] [-cdvrtvbr <value>]
Table 8-14

Table 8-14 Parameters for cnfrteoptthresh Command

Parameter
type
-awcbr
Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
CTD CDV
No No
No Yes
Yes No
Yes Yes
No No
No Yes
Yes No
Yes Yes
describes the cnfrteoptthresh command parameters.
Description
Grooming threshold parameter type to be set. You can set either the
grooming percentage (enter per) or the absolute value (enter abs). To
change both the percentage and absolute value, you must enter the
cnfrteoptthresh command twice, specifying a different threshold
parameter type each time.
Use the -awcbr option to set thresholds for the grooming CBR
connections based on cumulative AW. When the type parameter is set to
per, the range is 0 to 100 percent. When the type parameter is set to abs,
the range is 0 to 4294967295. The default values are percentage
reduction = 30 and absolute cost = 0.
Managing Connection Grooming
Selected
Metric
AW
CDV
CTD
CTD
AW
AW
AW
AW
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