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C H A P T E R 10 Quality of Service (QoS)
163
The sum of the minimum bandwidth values for the applied QoS
profiles should be kept to less than 90% of available bandwidth.
If the minimum bandwidth settings exceed 90% it is possible, under
a sustained situation of over-subscription, that a lower priority
queue could become “starved” and not transmit traffic.
Bi-directional Rate Shaping for
Layer 3 Routed VLANs
Bi-directional rate shaping allows you to perform bandwidth-
management for Layer 2 and Layer 3 traffic flowing both to and
from the switch.
8% 7.5 Mbps 75 Mbps
9% 9.3 Mbps 93 Mbps
10% 10 Mbps 100 Mbps
20% 18.7 Mbps 187 Mbps
25% 26.3 Mbps 263 Mbps
35% 34 Mbps 340 Mbps
50% 49 Mbps 490 Mbps
60% 63 Mbps 630 Mbps
80% 79 Mbps 790 Mbps
89% 94 Mbps 940 Mbps
Table 10.14: QoS Profile Minimum Bandwidth
Minimum
Bandwidth
Setting (%)
Minimum
Bandwidth@
100 Mbps
Minimum
Bandwidth
@ 1000 Mbps