Specifications

7-71
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 Priority Routing
Bandwidth for a priority is divided into three parts:
• The lowest range: you determine the lowest range by specifying the highest rate within the range.
For example, if you type 3000, the lowest range is 0–3000 cps.
• The highest range: the highest range is what is left over after you specify the lowest range, the
number of bandwidth groups, and the number of cells per second in each bandwidth increment.
• All incremental ranges between the lowest and the highest.
Note The de-routing of SVCs uses the same priority routing criteria.
Before you can prioritize a specific SPVC, you must set up the priority routing feature on the node itself,
as described in the section that follows.
Establishing Priority Routing on a Node
Priority routing is established on a node through the cnfpri-routing command at the PXM card.
SES.1.PXM.a > cnfpri-routing [-bwstart <start>] [-bwincr <incr>][-pribuf <time>] [-nodebuf
<delay>]
Table 7-36 describes the options available in the cnfpri-routing command.
Table 7-36 cnfpri-routing Command Options
Parameter Description
-bwstart The value for bwstart is the highest cell rate in the
lowest-speed bandwidth group. The number of
bandwidth groups is fixed at 50.”
Range: 1-500000
Default: 5000
-bwincr The increment for the cell rate between the upper
and lower bounds of each intermediate bandwidth
group. For example, an increment of 2000 means
that a range starting at 10000 cps ends at 12000
cps. This increment does not apply to the
following:
• The group with the lowest bandwidth
requirements: for this group, the range is
determined by the value for bwstart.
• The group with the highest bandwidth
requirements: for this group, the range is
what remains after computations based on the
following:
– The value for bwstart
– The value for bwincr
Range: 1–500000
Default: 1000