SMC Networks 100BASE-TX, 16 10BASE-T manual Configuring Rate Limits, Rate Limit Granularity

3 Configuring the Switch

Configuring Rate Limits

This function allows the network manager to control the maximum rate for traffic transmitted or received on a port. Rate limiting is configured on ports at the edge of a network to limit traffic coming into or out of the network. Traffic that falls within the rate limit is transmitted, while packets that exceed the acceptable amount of traffic are dropped.

Rate limiting can be applied to individual ports or trunks. When an interface is configured with this feature, the traffic rate will be monitored by the hardware to verify conformity. Non-conforming traffic is dropped, conforming traffic is forwarded without any changes.

Rate Limit Granularity

Rate limit granularity is an additional feature enabling the network manager greater control over traffic on the network. The “rate limit granularity” is multiplied by the “rate limit level” (page 3-81)to set the actual rate limit for an interface. Granularity is a global setting that applies to Fast Ethernet or Gigabit Ethernet interfaces.

Command Usage

•For Fast Ethernet interfaces, the rate limit granularity is 512 Kbps, 1 Mbps, or 3.3 Mbps

•For Gigabit Ethernet interfaces, the rate limit granularity is 33.3 Mbps.

Web – Click Port, Rate Limit, Granularity. Select the required rate limit granularity for Fast Ethernet and Gigabit Ethernet, and click apply.

Figure 3-49. Rate Limit Granularity Configuration

CLI - This example sets and displays Fast Ethernet and Gigabit Ethernet granularity.

Console(config)#rate-limit	fastethernet granularity 512	4-118
Console(config)#rate-limit	gigabitethernet granularity 33300	4-118
console#show rate-limit		4-118
Fast ethernet granularity:	512

Gigabit ethernet granularity: 33300

Console#

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