Configuration Guide User guide

FastIron Configuration Guide 1959
53-1002494-02
Fixed rate limiting on outbound port configuration
• This feature is not supported on FastIron X Series and Brocade FCX Series devices.
• Because of the hardware architecture, the effect of outbound rate limiting differs on GbE ports
compared to 10-GbE ports. For example, applying the same rate limiting value on GbE and
10-GbE ports will produce different results.
• You can configure both outbound port-base rate limiting and outbound port- and priority-based
rate limiting on a single physical port or trunk port. However, if a priority-based limit for a given
port is greater than the port-based rate limit, then the port-based rate limit will override the
priority-based rate limit. Similarly, if the port-based rate limit is greater than the priority-based
limit, then the priority-based rate limit will override the port-based rate limit.
Configuring port-based fixed rate limiting
To configure port-based fixed rate limiting on an outbound port, enter commands such as the
following.
Brocade(config)#interface ethernet 0/1/34
Brocade(config-if-e1000-0/1/34)#rate-limit output fixed 32
Outbound Rate Limiting on Port 0/1/34 Config: 32 Kbps, Actual: 65 Kbps
The above commands configure a fixed rate limiting policy that allows port 0/1/34 to transmit 32
Kbps. Since port 0/1/34 is a GbE port and the minimum rate is 65 Kbps (refer to Table 325), the
system will adjust the configured rate of 32 Kbps to an actual rate to 65 Kbps. If the port transmits
additional bits during a given one-second interval, the port will drop all outbound packets on the
port until the next one-second interval starts.
Brocade(config)#interface ethernet 0/2/1
Brocade(config-if-e1000-0/2/1)#rate-limit output fixed 32
Outbound Rate Limiting on Port 0/2/1 Config: 32 Kbps, Actual: 2500 Kbps
The above commands configure a fixed rate limiting policy that allows port 0/2/1 to transmit 32
Kbps per second. Since port 0/2/1 is a 10-GbE port and the minimum rate is 2500 Kbps (refer to
Table 325), the system will adjust the configured rate of 32 Kbps to an actual rate of 2500 Kbps. If
the port transmits additional bits during a given one-second interval, the port will drop all outbound
packets on the port until the next one-second interval starts.
Syntax: [no] rate-limit output fixed <average-rate>
The <average-rate> parameter specifies the average number of kilobits per second (Kbps) the port
can send. Table 325 lists the minimum and maximum rates for GbE and 10-GbE ports.
Configuring port- and priority-based rate limiting
Port- and priority-based rate limiting limits the rate on an individual 802.1p priority queue on an
individual physical port or trunk port.
To configure port- and priority-based fixed rate limiting on an outbound port, enter commands such
as the following.
Brocade(config)#interface ethernet 0/1/35
Brocade(config-if-e1000-0/1/35)#rate-limit output fixed 1000 priority 7
Outbound Rate Limiting on Port 0/1/35 for Priority 7
Config: 1000 Kbps, Actual: 975 Kbps