Alcatel-Lucent 6850-48 ネットワークガイド

Configuring Ethernet Ports

Setting Ethernet Parameters for All Port Types

OmniSwitch AOS Release 6 Network Configuration Guide

page 1-13

Note. Enabling multicast flood rate limiting with the 

 command will limit IP 

Multicast Switching (IPMS) and non-IPMS multicast traffic.

command is used to configure the peak flood rate value on a specific port, a 

range of ports, or all ports on a switch (slot) in megabits per second. Note the following regarding the 
configuration of this value:

• The interfaces flood rate command configures a maximum ingress flood rate value for an interface. 

This peak flood rate value is applied to flooded (unknown destination address, broadcast) and multi-
cast traffic combined. For example, if an interface is configured with a peak flood rate of 500 Mbps, 
the 500 Mbps limit is shared by all traffic types. 

• On all the OmniSwitch platforms the flood rate can be accurately configured for 512-byte packets. The 

flood rate cannot be accurately set for smaller or larger sized packets. The accuracy/resolution is 
limited because the switch makes an internal assumption of packet size when it converts 
bits/seconds to packets/seconds for the hardware.

• Although you can configure a flood rate equal to the line speed you should not do so. Alcatel-Lucent 

recommends that you always configure the flood rate to be less than the line speed.

By default the following peak flood rate values are used for limiting the rate at which traffic is flooded on 
a switch port:

To change the peak flood rate for an entire slot, enter interfaces followed by the slot number, flood rate, 
and the flood rate in megabits. For example, to configure the peak flood rate on slot 2 as 49 megabits, 
enter:

-> interfaces 2 flood rate 49

To change the peak flood rate for a single port, enter interfaces followed by the slot number, a slash (/), 
the port number, flood rate, and the flood rate in megabits. For example, to configure the peak flood rate 
on port 3 on slot 2 as 49 megabits, enter:

-> interfaces 2/3 flood rate 49

To change the peak flood rate for a range of ports, enter interfaces followed by the slot number, a slash (/
), the first port number, a hyphen (-), the last port number, flood rate, and the flood rate in megabits. For 
example, to configure the peak flood rate on ports 1 through 3 on slot 2 as 49 megabits, enter:

-> interfaces 2/1-3 flood rate 42

To specify the type of traffic eligible for rate limiting, see 

 and 

 for more information.

Mbps (10 Ethernet)

4

Mbps (100 Fast Ethernet)

49

Mbps (Gigabit Ethernet)

496

Mbps (10 Gigabit Ethernet)

997