28236-DSH-001-B Datasheet, PDF (216/443 Pages) M/A-COM Technology Solutions, Inc. – ATM ServiceSAR Plus with xBR Traffic Management

6.0 Traffic Management
6.5 Traffic Management Control and Status Structures
CN8236
ATM ServiceSAR Plus with xBR Traffic Management
6.5.3.3 Bucket Table for The Bucket table has only 256 entries. Tables 6-14 and 6-15 display the entry
VBR2 and VBRC format and field descriptions for the Bucket table.
Table 6-14. Bucket Table Entry
Word 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 Reserved
L2_EXP
L2_MAN
I2_EXP
I2_MAN
Table 6-15. Bucket Table Entry Field Descriptions
Field Name
Description
L2_EXP
L2_MAN
I2_EXP
I2_MAN
GCRA L parameter exponent for bucket 2.
L2_EXP must satisfy L2_EXP ≤ min(I2_EXP + 9 or 29).
L2_EXP that does not satisfy L2_EXP ≥ I2_EX – 9 has an effective L2 value of 0.
GCRA L parameter mantissa for bucket 2.
Bucket 2 L value is 2^{(L2_EXP - 10)}(1 + L2_MAN / 512).
GCRA I parameter exponent for bucket 2.
I2_EXP must satisfy 10 ≤ I2_EXP ≤ 25.
GCRA I parameter mantissa for bucket 2.
Bucket 2 I value is 2^{(I2_EXP – 10)}(1 + I2_MAN / 512).
6-48
Mindspeed Technologies™
28236-DSH-001-B