Brocade FastIron Ethernet Switch Traffic Management Guide - Manual (Page 58)

To include unknown-unicast limiting, enter the unknown-unicast limit command after enabling
broadcast limiting.
device(config-mif-e1000-1/1/1-1/1/8)# unknown-unicast limit
To include multicasts limiting, enter the multicast limit command after enabling broadcast limiting.
device(config-mif-e1000-1-8)# multicast limit
Syntax: [no] broadcast limit num
Syntax: [no] multicast limit
Syntax: [no] unknown-unicast limit
The num variable specifies the maximum number of Kilo bytes per second. It can be any number that
is a multiple of 8192, up to a maximum value of 2147418112. If you enter the multicast limit or
unknown-unicast limit command, multicast or unknown-unicast packets are included in the
corresponding limit. If you specify 0, limiting is disabled. If you specify a number that is not a multiple
of 8192, the software rounds the number to the next multiple of 8192. Limiting is disabled by default.
Command syntax for byte-based limiting
NOTE
Byte-based limiting is supported only on FSX devices with SXR 800 and SXR 1600 generation 2 line
cards. Byte-based limiting is not supported on the Brocade FCX Series, ICX 6610, ICX 6450, ICX
6430 devices and the SX-FI8XG, SX-FI-2XG, SX-FI-24HF, SX-FI-24GPP, and SX-FI-48GPP modules.
Byte-based limiting provides the ability to rate limit traffic based on byte count. When the byte mode is
enabled, packets will be received on a port as long as the number of bytes received per second is less
than the corresponding limit. Once the limit is reached, further packets will be dropped.
To enable broadcast limiting on a group of ports by counting the number of bytes received, enter
commands such as the following.
device(config)# interface ethernet 9 to 10
device(config-mif-e1000-9-10)# broadcast limit 131072 bytes
These commands configure byte-based broadcast limiting on ports 9 and 10. On each port, the total
number of bytes received from broadcast packets cannot exceed 131,072 per second.
To include multicasts in the 131072 bytes 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, enter commands such as the following.
device# config terminal
device(config)# interface ethernet 13
device(config-if-e1000-13)# unknown-unicast limit 65536 bytes
The combined number of bytes of inbound Unknown Unicast packets
permitted for ports 13 to 24 is now set to 65536
device(config-if-e1000-13)#
Syntax: [no] broadcast limit num bytes
Syntax: [no] multicast limit
Command syntax for byte-based limiting
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