Brocade Communications Systems 6650 manual Configuration notes for port-based fixed rate limiting

Port-based rate limiting

Configuration notes for port-based fixed rate limiting

•Rate limiting is available only on inbound ports.

•The rate limit on IPv6 hardware takes several seconds to take effect at higher configured rate limit values. For example, if the configured rate limit is 1500000 packets/second, line-rate limiting could take up to 43 seconds to take effect.

Configuring a port-based fixed rate limiting policy

To configure rate limiting on a port, enter commands such as the following.

Brocade(config)# interface ethernet 1/2/4

Brocade(config-if-e10000-1/2/4)# rate input fixed 500

These commands configure a fixed rate limiting policy that allows port 24 to receive a maximum of 500 packets per second. If the port receives additional packets during a given one-second interval, the port drops all inbound packets on the port until the next one-second interval starts.

Syntax: [no] rate-limit input fixed average-rate

For Brocade ICX 6650 devices, the average-rateparameter specifies the maximum number of packets per second (pkts/s) the port can receive. The minimum rate that can be configured is 125 pkts/s.

Displaying the port-based fixed rate limiting configuration

To display the fixed rate limiting configuration on the device, use the show rate-limit input command as shown below.

Brocade# show rate-limit input
Total rate-limited interface count: 5.			Actual Input Rate
Port	Configured Input Rate
1/1/1	65000	pkts/sec	65000	pkts/sec
1/1/2	95000	pkts/sec	195000	pkts/sec
1/1/6	1950	pkts/sec	1950	pkts/sec
1/2/2	230432	pkts/sec	230000	pkts/sec
1/2/6	234113	pkts/sec	234000	pkts/sec

Syntax: show rate-limit input

This command lists the ports on which fixed rate limiting is configured, and provides the information listed in Table 66 for each of the ports.

TABLE 66	CLI display of Fixed rate limiting information
Field		Description
Total rate-limited interface count		The total number of ports that are configured for Fixed rate limiting.
Port		The port number.
Configured Input Rate		The maximum rate requested for inbound traffic. The rate is measured
		in packets per second (pkts/s).
Actual Input Rate		The actual maximum rate provided by the hardware. The rate is
		measured in packets per second (pkts/s).

Brocade ICX 6650 Security Configuration Guide	275
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