Cabletron Systems SMARTSWITCH ROUTER 9032578-05 Manual de usuario descargar pdf (Pagina 331)

SmartSwitch Router User Reference Manual 305

Chapter 21: QoS Configuration Guide

To define a port rate limit policy, enter one of the following commands in Configure mode:

Note that for output port policies, the only action that you can specify if traffic exceeds the

specified rate is to drop packets.

If you configure output port policies, all types of outgoing IP traffic will be rate limited,

including control traffic. If you do not want control traffic to be subject to rate limiting,

enter the following command in Configure mode:

Because you specify a slot number in the above command, output port rate limiting

policies on any port on the specified slot will not be applied to control traffic.

Aggregate Rate Limiting

Use an aggregate rate limiting policy if an aggregation of flows needs to be limited to a

particular rate. For example, you can use aggregate rate limiting to rate limit traffic to or

from a particular subnet.

Note:

You cannot apply an aggregate rate limiting policy to an interface that spans ports

on more than one line card. For example, you cannot apply an aggregate rate

limiting policy to the interface ‘ip2,’ if ‘ip2’ interfaces to a VLAN that consists of

ports et.1.(1-4) and et.2.(1-4).

To configure aggregate rate limiting policies, you must first enable aggregate rate limiting

mode on the SSR (see “Rate Limiting Modes” on page 303).

Define a port rate limit policy to

limit incoming traffic on a port.

rate-limit <name> port-level input rate

<rate-limit> port <port list> { drop-packets|no-

action|lower-priority|lower-priority-

except-control|tos-precedence-rewrite

<val1> |tos-precedence-rewrite-lower-

priority

<val2> }

Define a port rate limit policy to

limit outgoing traffic on a port.

rate-limit <name> port-level output port

<port list> rate <rate-limit> drop-packets

Specify that control traffic is not

subject to output port rate

limiting.

rate-limit <name> port-level slot <slot-

number>

ignore-control-priority

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Cabletron Systems SMARTSWITCH ROUTER 9032578-05 Manual de usuario Pagina 331