Cabletron Systems GIGAswitch GSR-16, Руководство пользователя

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Chapter 19: QoS Configuration Guide
272 DIGITAL GIGAswitch/Router User Reference Manual
Limiting Traffic Rate
Note:
Some commands in this facility require updated GSR hardware. Please refer to the
Release Notes for details.
Traffic rate limiting provides the ability to control the usage of a fundamental network
resource, bandwidth. It allows you to limit the rate of traffic that flows through the
specified interfaces, thus reserving bandwidth for critical applications. Unlike traffic
prioritization, traffic rate limiting is a mechanism to control bandwidth usage of incoming
traffic on a per flow basis.
A traffic profile is used to define the traffic characteristics before an upper limit is assigned.
The traffic profile is created using one or more ACLs which can utilize any combination of
the parameters supported in the IP ACL. A
rate limiting profile can then be defined by
using the ACL and traffic rate limitations. A single rate limiting profile can have multiple
ACLs to define different traffic profiles and traffic rate limitations. When there are
multiple traffic profiles, a sequence number is used to identify the order in which the
profiles are applied. You can define the action taken on the traffic that exceeds the upper
limit: either drop the packets or reset the priority of the traffic. The rate limiting profile is
then applied to a logical IP interface.
To define a rate limit profile and apply the profile to an interface, enter the following
commands in Configure mode:
Note:
You cannot use non-IP ACLs for rate limit profiles.
Example Configuration
The following is an example of configuring rate limiting on the GSR.
Define a rate limit profile. rate-limit
<name>
input acl
<acl list>
rate
<rate-limit>
exceed-action drop-packets|set-
priority-low|set-priority-medium|set-
priority-high [sequence
<number>
]
Apply a rate limit profile to an
interface. rate-limit
<name>
apply interface
<interface>
|all
ipclient1
ipclient2
Backbone
et.1.1
et.1.2
3.3.3.3/8
1.1.1.1/8
et.1.8
2.2.2.2/8
Router