Configuring A Port-And-Priority-Based Rate Limiting Policy; Configuring A Port-And-Vlan-Based Rate Limiting Policy - Dell PowerConnect B-RX Configuration Manual

The <requested-rate> parameter specifies the maximum rate allowed on a port during a
one-second interval. The minimum configurable requested rate is 20,345 bps. The maximum
configurable rate limiting rate is near line-rate.
Refer to
The <maximum-burst> parameter specifies the extra bits above the requested rate that traffic can
have. Refer to

Configuring a port-and-priority-based rate limiting policy

802.1p packet priority is used by default. The priority number specifies the IEEE 802.1 equivalent
to one of the four Brocade QoS queues. You can configure port-and-priority-based rate limiting for
each of the priority numbers 1 - 7 on a port.
To configure a port-and-priority-based rate limiting policy, enter commands such as the following at
the interface level.
BigIron RX(config)# interface ethernet 1/2
BigIron RX(config-if-e1000-1/2)# rate-limit in priority 0 500000000 750000000
Average rate is adjusted to 499639656 bits per second
BigIron RX(config-if-e1000-1/2)# rate-limit in priority 1 priority 2 priority 3
650000000 650000000
The commands configure port-and-priority-based rate limiting policies on inbound port 1/2. The
policies requests a rate limit of 500 Mbps on hardware forwarding queues 0 and 1 on the port, with
a maximum burst size of 750 Mbits. The device adjusts the requested rate to 499639656 bits per
second.
Syntax: [no] rate-limit input priority <num> <requested-rate> <maximum-burst>
The priority <num> parameter specifies the 802.1p priority levels 0 – 7, equivalent to one of the
four QoS queues. For information on the priority level and the corresponding queue, refer to
"Assigning QoS priorities to traffic"
For information on the other parameters, refer to
page 508.

Configuring a port-and-VLAN-based rate limiting policy

To configure a port-and-VLAN-based rate limiting policy, enter commands such as the following.
BigIron RX(config)# interface ethernet 1/3
BigIron RX(config-if-e1000-1/3)# rate-limit in vlan 10 500000000 750000000
Average rate is adjusted to 499321856 bits per second
BigIron RX(config-if-e1000-1/3)# rate-limit in vlan 20 100000000 600000000
Average rate is adjusted to 97523712 bits per second
The commands configure two rate limiting policies that limit the requested rate of inbound traffic
on port 1/3. The first policy request to limit packets with VLAN tag 10 to an rate of 500 Mbps with a
maximum burst size of 750 Mbits on the port. The second policy requests to limit packets with
VLAN tag 20 to an rate of 100 Mbps with a maximum burst size of 600 Mbits on the port. Tagged
packets belonging to VLANs other than 10 and 20 and untagged packets are not subject to rate
limiting on port 1/3.
Syntax: [no] rate-limit input vlan <vlan-number> <requested-rate> <maximum-burst>
BigIron RX Series Configuration Guide
53-1002253-01
"Requested rate" on page 506 for more details.
"Maximum burst" on page 506 for more details.
Configuring rate limiting policies
on page 480.
"Configuring a port-based rate limiting policy"
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