Rate Profile Tables
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/055-15
Beta Draft Confidential
Rate Profile Tables
You can load four rate profile tables into the ATM FCP. The ATM FCP uses these
tables to determine the Rate Increase Exponent (RIE) and the Rate Decrease Exponent
(RDE) for each VC on a port. These, in turn, are used to compute the RIF and the
RDF. The RIE and RDE values for any VC are obtained from indexing the
corresponding rate profile table with the VC’s MCR class. The MCR (SCR for
VBR-NRT VCs) of any VC is mapped to one of 256 MCR classes. See “MCR Class
Mappings” on page D-4 for information about MCR classes.
For information on downloading the tables using Navis EMS-CBGX, see
“Downloading Buffer Threshold and Rate Profile Tables” on page 6-8.
The RIE and RDE are defined as follows:
Rate Increase Exponent (RIE) — The RIE is a configurable value that is the
negative exponent for the RIF calculation (RIF=2
-RIE
). For example, an RIE of 3
translates to an RIF of 1/8. The RIE must be less than 16.
Rate Decrease Exponent (RDE) — The RDE is a configurable value that is the
negative exponent for the RDF calculation (RDF=2
-RDE
). For example, a value of 3
translates to an RDF of 1/8. The RDE must be less than 16.
Table 5-1. Cell Scheduling
Port
Bandwidth
Max. Port Cell
Rate (cps)
Max. Number of Circuits
(connections/port)
Min. Allocated
MCR (cps)
OC-12 1412830 16K 256
OC-3 353207 4K 88
DS3 96000 2K 55
E3 80000 2K 40
DS1 3622 2K 8
E1 4528 2K 8
To Next Page
Loading...
Need help?
General
