Brocade Communications Systems 6650 Rate Limiting and Rate Shaping, Port-based rate limiting

	Chapter
Rate Limiting and Rate Shaping	11

Table 65 lists the rate limiting and rate shaping features supported on Brocade ICX 6650. These features are supported in the Layer 2, edge Layer 3, and full Layer 3 software images, except where explicitly noted.

TABLE 65 Supported rate limiting and rate shaping features

Feature	Brocade ICX 6650
Inbound rate limiting (Port-based rate	Yes
limiting on inbound ports)
Outbound rate shaping	Yes

This chapter describes how to implement and configure port-based rate limiting and rate shaping on Brocade ICX 6650.

Port-based rate limiting

Rate limiting applies to inbound ports and rate shaping applies to outbound ports. Port-based fixed rate limiting is supported on inbound ports. This feature allows you to specify the maximum number of packets a given port can receive. The port drops packets that exceed the limit you specify. You can configure a Fixed rate limiting policy on a port inbound direction only. Fixed rate limiting applies to all traffic on the rate limited port.

Fixed rate limiting is at line rate and occurs in hardware. Refer to “Rate limiting in hardware” on page 274.

The Fixed rate limiting policy applies to one-second intervals and allows the port to receive the number of packets you specify in the policy, but drops additional packets. Unused bandwidth is not carried over from one interval to the next.

NOTE

Port based Rate Limiting affects only known-unicast traffic. Broadcast, Multicast and Unknown-unicast (BUM) is not affected by this rate. To rate limit the BUM traffic, use BUM rate limiting as described in chapter BUM Rate Limiting.

NOTE

Brocade recommends that you do not use Fixed rate limiting on ports that receive route control traffic or Spanning Tree Protocol (STP) control traffic. If the port drops control packets due to the Fixed rate limiting policy, routing or STP can be disrupted.

Brocade ICX 6650 Security Configuration Guide	273
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