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PowerConnect B-Series FCX Configuration Guide 617
53-1002266-01
ACL-based rate limiting using traffic policies
18
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.
The traffic-policy <TPD name> parameter is the name of the traffic policy definition. This value can
be eight or fewer alphanumeric characters.
The rate-limit adaptive cir <cir value> specifies that the policy will enforce a flexible bandwidth limit
that allows for bursts above the limit.The <cir value> variable is the committed information rate in
kbps. Refer to Table 108.
The cbs <cbs value> parameter is the committed burst size in bytes. Refer to Table 108.
The pir <pir value> parameter is the peak information rate in kbps. Refer to Table 108.
The pbs <pbs value> parameter is the peak burst size in bytes. Refer to Table 108.
The exceed-action <action> parameter specifies the action to be taken when packets exceed the
configured values. Refer to “Specifying the action to be taken for packets that are over the limit” on
page 617.
The count parameter is optional and enables ACL counting. Refer to “ACL statistics and rate limit
counting” on page 619.
Inspecting the 802.1p bit in the ACL for adaptive rate limiting
NOTE
This feature is supported on PowerConnect B-Series FCX devices only.
You can configure the Dell device to rate limit traffic for a specified 802.1p priority value. To do so,
complete the following configuration steps.
1. Create an adaptive rate limiting traffic policy. Enter command such as the following:
PowerConnect(config)#traffic-policy adap rate-limit adaptive cir 1000 cbs 1000
pir 2000 pbs 10000 exceed-action drop
2. Create an IPv4 extended ACL or IPv6 ACL that includes the traffic policy and 802.1p priority
matching value. Enter a command such as the following:
PowerConnect(config)#access-list 136 permit ip any any 802.1p-priority
matching 3 traffic-policy adap
3. Bind the ACL to an interface.Enter commands such as the following,.
PowerConnect(config)#interface ethernet 7
PowerConnect(config-if-e7)#ip access-group 136 in
PowerConnect(config-if-e7)#exit
Use the show access-list accounting command to view accounting statistics. For more information,
refer to “Viewing ACL and rate limit counters” on page 620.
Specifying the action to be taken for packets that are
over the limit
You can specify the action to be taken when packets exceed the configured CIR value for fixed rate
limiting, or the CIR, CBS, PIR, and PBS values for adaptive rate limiting. You can specify one of the
following actions: