Brocade TurboIron 24X Series Configuration Guide - Manual (Page 1065)

Brocade TurboIron 24X Series Configuration Guide 1031
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Rate limiting in hardware
Configuring a port-based rate limiting policy
To configure rate limiting on a TurboIron port, enter commands such as the following.
TurboIron(config)#interface ethernet 24
TurboIron(config-if-e10000-24)#rate input fixed 64
These commands configure a fixed rate limiting policy that allows port 24 to receive a maximum of
64 kilobits per second (65536 bytes per second). If the port receives additional bits during a given
one-second interval, the port drops all inbound packets on the port until the next one-second
interval starts.
Syntax: [no] rate-limit input fixed <average-rate> [burst <burst-size in kbits>]
For TurboIron devices, the <average-rate> parameter specifies the maximum number of <kilobits>
per second (kbps) the port can receive. The minimum rate that can be configured is 64,000 bytes
per second.
The optional burst parameter specifies the burst size. If this parameter is not defined, the default
value is computed as shown below:
Default Burst Size = MIN(average-rate, 2415328) kilobits
where 2,415,328 kilobits is the hardware limit for burst size.
Configuring an ACL-based rate limiting policy
IP ACL-based rate limiting of inbound traffic provides the facility to limit the rate for IP traffic that
matches the permit conditions in extended IP ACLs. This feature is available in the Layer 2 and
Layer 3 code.
To configure ACL-based rate limiting on a device, you create individual traffic policies, then
reference the traffic policies in one or more ACL entries (also called clauses or statements). The
traffic policies become effective on ports to which the ACLs are bound.
For configuration procedures for ACL-based rate limiting,refer to Chapter 29, “Configuring Traffic
Policies” .
Displaying the fixed rate limiting configuration
To display the fixed rate limiting configuration on the device, enter the following command.
TurboIron#show rate-limit fixed
Total rate-limited interface count: 11.
Port Configured Input Rate Actual Input Rate
1 1000000 1000000
3 10000000 10005000
7 10000000 10000000
9 7500000 7502000
11 8000000 7999000
12 8000000 7999000
13 8000000 7999000
14 8000000 7999000
15 8000000 7999000
21 8000000 8000000
25 7500000 7502000