SMC Networks 7724M/VSW - annexe 1, Manual

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Management Guide CLI
TigerAccess™ EE
SMC7824M/VSW 345
8.9.3 Port Flood-Guard
A packet storm occurs unexpectedly when a large number of broadcast, unicast, or multi-
cast packets are received on a port. Forwarding these packets can cause the network to
slow down or to time out. This switch provides pps-control function that controls traffic for
a specified port by threshold value. If a large number of incoming packets exceed the
threshold, the traffic is discarded during specified time when pps-control function enables
on this port.
To set the threshold of pps-control, use the following command.
Command Mode Description
pps-control port PORTS
THRESHOLD { 5 | 60 | 600 }
Sets the threshold of port traffic.
PORTS: port number (1, 2, 3, …)
THRESHOLD: threshold value (the number of packets
per 1 second)
5 | 60 | 600: time interval (unit: second)
no pps-control port PORTS
Global
Deletes the configured threshold of port traffic.
To set the timer for blocking traffic, use the following command.
Command Mode Description
pps-control port PORTS block
timer <10-3600>
Sets the time of changing the state of a blocked port to
NORMAL. If you set the interval as 10, the state of the
blocked port will be changed back to normal after 10
seconds.
PORTS: port number (1, 2, 3, …)
10-3600: time (unit: second)
no pps-control port PORTS
block
Global
Disables the blocking timer option.
To show the configuration of pps-control function, use the following command.
Command Mode Description
show pps-control port [ PORTS ]
Enable
Global
Bridge Shows the configured of pps control.