Extreme Networks ExtremeWare XOS 11.1, Руководство пользователя

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Bi-Directional Rate Shaping—BlackDiamond 10K Switch Only
ExtremeWare XOS 11.1 Concepts Guide
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The following is sample output from the
show configuration vlan
command for configured egress
rate limiting:
Aspen.2 # show configuration vlan
#
# Module vlan configuration.
#
create virtual-router "VR-Default"
configure virtual-router VR-Default add ports 3:1-48
create vlan "Default"
configure vlan Default tag 1
config port 3:1 rate-limit egress 128 Kbps max-burst-size 200 Kb
config port 3:2 rate-limit egress 128 Kbps
config port 3:10 rate-limit egress 73 Kbps max-burst-size 128 Kb
configure vlan Default add ports 3:1-48 untagged
NOTE
Refer to Chapter 11 for more information on limiting broadcast, multicast, or unknown MAC traffic ingressing the
port.
Bi-Directional Rate Shaping—BlackDiamond 10K
Switch Only
NOTE
If you are working with an Aspen 8810 switch, refer to Chapter 11 for information on metering the ingressing traffic.
With software version 11.0, you can configure and display bi-directional rate shaping parameters. on the
BlackDiamond 10K switch. Bi-directional rate shaping allows you to manage bandwidth on Layer 2 and
Layer 3 traffic flowing to each port on the switch and from there to the backplane. You can configure up
to 8 ingress queues, which send traffic to the backplane, per physical port on the I/O module. By
defining minimum and maximum bandwidth for each queue, you define committed and peak
information rates for each queue. You can define different priorities for each queue for each port. Rate
shaping on the ingress port allows the switch to enforce how much traffic from a particular port can
ingress to the system.
Bi-directional rate shaping on the BlackDiamond 10K switch controls the traffic from the ingress ports to
the backplane and provides guaranteed minimum rates. The number of queues from the ingress port to
the backplane differs between I/O modules. The 1 Gbps I/O module has 2 queues from the ingress port
to the backplane, and the 10 Gbps I/O module has 8 queues from the ingress port to the backplane.
You set minimum bandwidth, maximum bandwidth, and priority for each queue for each port. Use
prioritization when two or more hardware queues on the same physical port are contending for
transmission, only after their respective bandwidth management parameters have been satisfied. Once
the priorities are satisfied, the switch uses a round-robin system to empty the queues to the backplane.
Table 38 displays the mapping of the ingress queues and the priority value for each I/O module.