Brocade TurboIron 24X Series Configuration Guide - Manual (Page 967)

Brocade TurboIron 24X Series Configuration Guide 933
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ACL-based rate limiting using traffic policies
The above commands configure a fixed rate limiting policy that allows port e5 to receive a
maximum traffic rate of 100 kbps. If the port receives additional bits during a given one-second
interval, the port drops the additional inbound packets that are received within that one-second
interval.
Syntax: [no] traffic-policy <TPD name> rate-limit fixed <cir value> exceed-action <action> [count]
Syntax: access-list <num> permit | deny.... traffic policy <TPD name>
Syntax: [no] ip access-group <num> in
NOTE
For brevity, some parameters were omitted from the above access-list syntax.
The software allows you to add a reference to a non-existent TPD in an ACL statement and to bind
that ACL to an interface. The software does not issue a warning or error message for non-existent
TPDs.
Use the no form of the command to delete a traffic policy definition. Note that you cannot delete a
traffic policy definition if it is currently in use on a port. To delete a traffic policy, first unbind the
associated ACL.
<TPD name> is the name of the traffic policy definition. This value can be 8 or fewer alphanumeric
characters.
rate-limit fixed specifies that the traffic policy will enforce a strict bandwidth.
<cir value> is the committed information rate in kbps. This value can be from 64 – 1000000
Kbps.
exceed-action <action> specifies the action to be taken when packets exceed the configured cir
value. Refer to
“Specifying the action to be taken for packets that are over the limit” on page 935.
The count parameter is optional and enables ACL counting. Refer to “ACL and rate limit counting”
on page 936.
Configuring ACL-based adaptive rate limiting
Use the procedures in this section to configure ACL-based adaptive rate limiting. Before configuring
this feature, see what to consider in
“Configuration notes and feature limitations” on page 930.
Table 143 lists the configurable parameters for ACL-based adaptive rate limiting.
TABLE 143 ACL-Based adaptive rate limiting parameters
Parameter Definition
Committed Information Rate (CIR) The guaranteed kilobit rate of inbound traffic that is allowed on a port.
Committed Burst Size (CBS) The number of bytes per second allowed in a burst before some packets will
exceed the committed information rate. Larger bursts are more likely to
exceed the rate limit. The CBS must be a value greater than zero (0).
Brocade recommends that this value be equal to or greater than the size of
the largest possible IP packet in a stream. The CBS value is specified in
kilobits.