mac

93
Parameters: use dlf to limit unicast traffic for unknown destination; multicast to limit
multicast traffic; broadcast to limit broadcast traffic. <Kbits> means the number of packets
allowed to pass per second, the ranging from 1 to 1000000.
Command mode: Port Mode.
Default: No limit is set by default. So, broadcasts, multicasts and unknown destination
unicasts are allowed to pass at line speed.
Usage Guide: All ports in the switch belong to a same broadcast domain if no VLAN has
been set. The switch will send the above mentioned three traffics to all ports in the
broadcast domain, which may result in broadcast storm and so may greatly degrade the
switch performance. Enabling Broadcast Storm Control can better protect the switch from
broadcast storm. Note the difference of this command in 10Gb ports and other ports. If the
allowed traffic is set to 1000kbps, this means allow 1000 kbit per second and suppress the
rest.
Broadcast suppression is similar to bandwidth control. There is granularity limitation for
the chip; S6208 series switch support 1M and 62.5K granularities. When setting the value
to be integer multiple of 1M, the setting value is effective, other conditions get integer of
62.5K granularity
For broadcast suppression, broadcast, multicast, dlf must be set the same threshold
value.
Example: Setting ports 1-8 allow 1000kbit broadcast packets per second.
Switch(config-if-port-range)#rate-suppression broadcast 1000
3.1.13 rate-violation
Command: rate-violation <200-2000000> [recovery <0-86400>|]
no rate-violation
Function: Set the max packet reception rate of a port. If the rate of the received packet
violates the packet reception rate, shut down this port and configure the recovery time, the
default is 300s. The no command will disable the rate-violation function of a port.
The rate-violation means the port received all packets rate (the number of the received
packets per second), do not distinguish the packet type.
Parameters: <200-2000000> the max packet reception rate of a port, the unit is
packets/s.
<0-86400>: The interval of recovery after shutdown, the unit is s.
recovery: After a period of time the port can recover shutdown to up again. <0-86400> is
the timeout of recovery. For example, if the shutdown of a port happens after the packet
reception rate exceeding the limit, the port will be up again when the user-defined timeout
expires. The default timeout is 300s, while 0 means the recovery will never happen.