Extreme Networks ExtremeWare XOS 11.3, Manual

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Bi-Directional Rate Shaping—BlackDiamond 10K Switch Only
ExtremeWare XOS 11.3 Concepts Guide
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Bandwidth Settings
You apply ingress QoS profile (IQP or rate shaping) values on the BlackDiamond 10K switch as either a
percentage of bandwidth or as an absolute value in Kbps or Mbps. IQP bandwidth settings are in turn
applied to queues on physical ports. The impact of the bandwidth setting is determined by the port
speed (1 or 10 Gbps).
NOTE
You may see slightly different bandwidths because the switch supports granularity down to 62.5 Kbps.
Maximum Bandwidth Settings
The maximum bandwidth settings determine the port bandwidth available to each of the ingress port
queues.
Minimum Bandwidth Settings
The minimum bandwidth settings, or maximum committed rate settings, determine the port bandwidth
reserved for each of the ingress port queues.
Table 48 displays the maximum committed rates available for each port on each BlackDiamond 10K
switch I/O module.
Please note that these maximum committed rates vary with the number of active ports on each I/O
module. The rates shown in
Table 48 are what you can expect when you all running all ports at traffic
level. If you are using fewer ports, you will have higher committed rates available for each port. And,
the maximum committed rate is reached when you are running traffic on only one port.
NOTE
Cumulative percentages of minimum bandwidth of the queues on a given port should not exceed 100%
If you choose a setting not listed in the tables, the setting is rounded up to the next value. If the actual
bandwidth used is below the minimum bandwidth, the additional bandwidth is not available for other
queues on that physical port.
Configuring Bi-Directional Rate Shaping
The maximum bandwidth or rate defined in the BlackDiamond 10K switch ingress QoS profile defines
the rate limit for ingress traffic on rate-shaped ports. You set minimum and maximum rates for each
Table 48: Maximum committed rates per port for I/O module on the BlackDiamond 10K switch
I/O module MSM configuration Maximum committed rate
1 Gbps module Single MSM 200 Mbps
Dual MSM 400 Mbps
10 Gbps module Single MSM 2 Gbps
Dual MSM 4 Gbps