CDM-840 Remote Router MN-CDM840
Appendix J Revision 3
J–14
bytes). Queues 2 and 3 will consume all of the bytes because they have yet to reach
their maximum bandwidth.
4. Calculate each bandwidth share based on the total remaining weight (15) and remaining
bandwidth of 14 kbps (1750 bytes):
o Queue 2 = 1750 * (8 / 15) = 934 bytes (7.472 kbps)
o Queue 3 = 1750 * (7 / 15) = 816 bytes (6.528 kbps)
5. After Round 2, Queue 2 can be assigned a maximum of 32 kbps (4000 bytes), hence the
remaining 2.144 kbps ((3334 − 934) − 4000 = 268 bytes) goes back into pool the pool
once more. Queue 3 will consume all of the bytes because it has yet to reach its
maximum bandwidth.
6. Calculate each bandwidth share based on the total remaining weight (7) and remaining
bandwidth (268 bytes):
o Queue 3 = 268 * (7 / 7) = 268 bytes (2.144 kbps)
7. In the next round (Round ‘N’), only Queue 3 has a maximum bandwidth that is not yet.
This queue will take the remaining quantum 2.144 kbps (268 bytes). Since there is no
more leftover bandwidth, the calculation loop stops here.
Case 2 Example Summary – After all rounds, each queue’s share is as follows:
Q1 = 16 kbps ((2000 additional bytes (4000 bytes total))
Q2 = 32 kbps ((4000 additional bytes (8000 bytes total))
Q3 = 32 kbps ((4000 additional bytes (10000 bytes total))
Q4 = 0 kbps (( 0 additional bytes (8000 bytes total))
• Case 3 – The per-queue quantum is less than the configured maximum bandwidth.
Case 3 / Example 1 – The Pri-Weighted QoS rules are configured as follows:
Each queue is configured with minimum bandwidth and weight as specified in this table. The
total allowed bandwidth is 40 kbps (5000 Bps).
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