Brocade FastIron Ethernet Switch Traffic Management Guide - Manual (Page 56)

‐ Unknown unicast limiting is independent of broadcast and multicast limiting. To enable
multicast limiting, enable it after enabling broadcast limiting. Multicast limiting uses the
limit defined in broadcast limiting. You cannot set a separate limit for multicast limiting.
‐ FastIron X Series devices support packet-based and byte-based limiting per port, as
well as simultaneously on the same port. For example, you can configure the broadcast
limit in packet-based mode and the unknown unicast limit in the byte-based mode on the
same port.
‐ On FastIron X Series devices, when you configure unknown-unicast limiting, the rate
applies to all ports in the port range for which unknown unicast is enabled. Also, when
you enable multicast limiting, it is enabled on all the ports in the port range for which
broadcast limiting is enabled. A 1-Gbps port range consists of 12 ports.
• SX-FI48GPP interface module for all generation 3 line cards
‐ To enable multicast or unknown-unicast limiting, enable it after enabling broadcast
limiting. Multicast and unknown-unicast limiting use the limit defined in broadcast limiting.
You cannot set a separate limit for unknown-unicast limiting and multicast limiting.
‐ The SX-FI48GPP module supports packet-based limiting only. It does not support byte-
based limiting.
‐ Each port on the SX-FI48GPP module can be configured individually.
• Brocade FCX Series , and ICX 6430 devices
‐ To enable unknown-unicast limiting or multicast limiting, enable it after enabling
broadcast limiting. Unknown-unicast limiting and multicast limiting use the limit defined in
broadcast limiting. You cannot set a separate limit for unknown-unicast limiting and
multicast limiting.
‐ Brocade FCX Series, and ICX 6430 devices support packet-based limiting only.
• Brocade ICX 6610 and ICX 6450 devices support byte-based limiting only.
• Brocade ICX 6650 devices support packet-based limiting only. Limits set on such flooded traffic
are also in terms of packets per second.
• Brocade ICX 7750 devices support both byte-based and packet-based rate-limiting.
Command syntax for packet-based limiting
On FastIron X-Series devices
To enable broadcast limiting on a group of ports by counting the number of packets received, enter
commands such as the following.
device(config)# interface ethernet 1 to 8
device(config-mif-e1000-1-8)# broadcast limit 65536
These commands configure packet-based broadcast limiting on ports 1 - 8. On each port, the
maximum number of broadcast packets per second cannot exceed 65,536 packets per second.
To include multicasts in the 65536 packets per second limit on each of the ports, enter the multicast
limit command after enabling broadcast limiting.
device(config-mif-e1000-1-8)# multicast limit
To enable unknown unicast limiting by counting the number of packets received, enter commands
such as the following.
device(config)# interface ethernet 1
Command syntax for packet-based limiting
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