PLANET XGS3-24042 - Manual (Page 132)

XGS3 Command Guide
4-132
There are two modes that can respond up/down event of the port. The interrupt mode means that interrupt hardware
to announce the up/down change, the poll mode means that software poll can obtain the port event, the first mode is
rapid. If using poll mode, the convergence time of MRPP is several hundred milliseconds, if using interrupt mode, the
convergence time is less than 50 milliseconds.
Notice: The scan mode of the port usually configured as poll mode, the interrupt mode is only used to the
environment of the good performance, but the security of the poll mode is better.
Example:
Configure the scan mode of the port as interrupt mode.
Switch(config)# port-scan-mode interrupt
4.1.12 rate-suppression
Command:
rate-suppression {dlf | broadcast | multicast}
no rate-suppression {dlf | broadcast | multicast}
Function:
Sets the traffic limit for broadcasts, multicasts and unknown destination unicasts on all ports in the switch; the no
command disables this traffic throttle function on all ports in the switch, i.e., enables broadcasts, multicasts and
unknown destination unicasts to pass through the switch at line speed.
Parameters:
use dlf to limit unicast traffic for unknown destination; multicast to limit multicast traffic; broadcast to limit broadcast
traffic. is the limit of packet number, ranging from 1 to 1488905. For non-10GB ports, the unit of
is PPS, that is, the value of is the number of packets allowed to pass per second; for 10GB ports, the unit
is KPPS, that is, the value of multiplies 1000 makes the number of packets allowed, so the value should
be less than 14880.
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 3, this means
allow 3,120 packets per second and discard the rest for 10Gb ports. However, the same setting for non-10Gb ports
means to allow 3 broadcast packets per second and discard the rest.
Example: