Cabletron Systems 9032578-05 manual Per-Flow Rate Limiting, Port Rate Limiting, Policy

Chapter 21: QoS Configuration Guide

To enable aggregate rate limiting mode on the SSR, enter the following command in Configure mode:

Enable aggregate rate limiting mode on the SSR.

system enable aggregate-rate-limiting

To change the rate limiting mode on the SSR back to per-flow mode, negate the above command.

Per-Flow Rate Limiting

Use a per-flow rate limiting policy if an individual traffic flow needs to be limited to a particular rate. A single per-flow rate limiting policy 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.

Note: Per-flow rate limiting is enabled on the SSR by default. If you enable aggregate rate limiting on the SSR, you cannot configure per-flow rate limiting policies.

To define a per-flow rate limit policy and apply the policy to an interface, enter the following commands in Configure mode:

Define a per-flow rate limit	rate-limit <name> input acl <acl list> rate
policy.	<rate-limit>exceed-action drop-packetsset-
	priority-lowset-priority-mediumset-
	priority-high [sequence <number>]
Apply a per-flow rate limit	rate-limit <name> apply interface
profile to an interface.	<interface>all

Note: You cannot use non-IP ACLs for per-flow rate limit policies.

Port Rate Limiting

Use a port rate limiting policy if incoming or outgoing traffic on a particular port needs to be rate limited. Unlike other types of rate limiting policies, you do not specify an ACL when defining this type of policy. Port rate limiting policies do not need to be applied to an interface and take effect when they are created.

To configure port rate limiting policies for input ports, you must first enable aggregate rate limiting mode on the SSR (see “Rate Limiting Modes” on page 303). You do not need to enable aggregate rate limiting mode to configure a policy to limit outgoing traffic on a port. You can configure port-level rate limiting policies on output ports in either per-flow or aggregate rate limiting mode.

304 SmartSwitch Router User Reference Manual