Configuration Guide User guide

FastIron Configuration Guide 33
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Configuring the device as an SNTP server
• FastIron X Series devices, except for the SX-FI48GPP interface module
- 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
 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.
• FastIron WS, 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.
- FastIron WS, Brocade FCX Series, and ICX 6430 devices support packet-based limiting
only.
• Brocade ICX 6610 and ICX 6450 devices support byte based limiting only
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.
Brocade(config)# interface ethernet 1 to 8
Brocade(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.
Brocade(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.