User Manual UMN:CLI
V5808
389
1-2147483647: the number of packets per 1 second
You can also enable the blocking option. When the blocking option for system flood guard
is running, if the number of incoming packets per second exceeds a configured value, the
port will discard those packets during a specified time.
To set an expire time for blocked port, use the following command.
system-flood-guard PORTS
timer <10-3600>
Enables the blocking option.
10-3600: blocking time (default:60, unit: second)
To disable the blocking option for the blocked port to permit the packet transmission, use
the following command.
system-flood-guard PORTS
unblock
Disables the blocking option.
To display the configured system flood guard, use the following command.
Shows the configured system flood guard.
BPDU is still transmitted even if the specific port is blocked by system flood guard.
8.9.4 Invalid Traffic Guard
A packet storm may occur unexpectly if a large number of invalid packets are received on
a port. It can cause the network to slow down or to time out. The V5808 provides the
traffic guard function that controls the port’s traffic by threshold value. The threshold (%)
rate is based on the number of packets per second (pps). Basically, a maximum pps is
usually calculated when all Ethernet frames are of 64-bytes in length, or the minimum
size frame. Because of the Inter-Packet Gap (12 bytes) and preamble (8 bytes), the
minimum packet size becomes 84 bytes.
The following table shows the performance numbers in packets per second (pps) for
100M, 1G and 10G Ethernet port.
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