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QoS Overview
Rate (kbits_sec)
1048576 - 2097151
2097152 - 4194303
4194304 - 8388607
8388608 - Max
Table 13: Supported Hardware Rates and CIR/PIR Values for 7210 SAS-X devices
Hardware Rate Steps
12.359619
24.719238
49.438477
98.876953
197.753906
395.507812
791.015625
791.015625
1582.031250
3164.062500
6328.125000
12656.25
25312.50
50625.0
101250.0
To illustrate how the adaptation rule constraints minimum, maximum and closest are evaluated in
determining the operational CIR or PIR for the 7210 SAS, assume there is a queue where the
administrative CIR and PIR values are 90Kbps and 150 Kbps, respectively.
If the adaptation rule is minimum, the operational CIR and PIR values will be 99 Kbps and 161
Kbps (The hardware rate step is 12.359619) respectively as it is the native hardware rate greater
than or equal to the administrative CIR and PIR values.
If the adaptation rule is maximum, the operational CIR and PIR values will be 87 Kbps and 149
Kbps.
Page 42
7210 SAS-X and 7210 SAS-R6 OS Quality of Service Guide
Rate Step Size (bits)
1024
2048
4096
8192
Rate Range (kbps)
0 to 3151
3152 to 6303
6304 to 12606
12607 to 25213
25214 to 50427
50428 to 100854
100855 to 201708
100855 to 201708
201709 to 403417
403418 to 806835
806836 to 1613671
1613672 to 3227343
3227344 to 6454687
6454688 to 12909375
12909376 to 25818750
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