User Manual
UMN:CLI
V8102
467
9.12
PPS Control
A packet storm occurs unexpectedly when a large number of broadcast, unicast, or mul-
ticast packets are received on a port, which may cause unnecessary network congestion.
The V8102 provides the PPS control function that controls traffic for a port by given
threshold. If the number of incoming packets exceeds the threshold, the system gener-
ates a syslog message and SNMP trap.
To set the threshold for PPS control, use the following command.
Command
Mode
Description
pps-control THRESHOLD
{
5
|
60
|
600
}
Interface
[XE/GE/GPON]
Sets the threshold for PPS control.
THRESHOLD: number of packets per second
(pps)
5 | 60 | 600: time interval (unit: second)
no pps-control
Deletes the configured threshold for PPS con-
trol.
When the blocking option for PPS control is running, if the number of incoming packets
exceeds a configured threshold, the traffic is discarded during specified time.
To enable the blocking option, use the following command.
Command
Mode
Description
pps-control block timer
<10-
3600>
Interface
[XE/GE/GPON]
Enables the blocking option.
10-3600: blocking time (unit: second)
no pps-control block
Disables the blocking option.
To display current incoming packet statistics and configurations for PPS control, use the
following command.
Command
Mode
Description
show pps-control
[
interface
{
gigabitethernet
|
tengiga-
bitethernet
|
gpon
}
IFPORT
]
Enable
Global
Interface
[XE/GE/GPON]
Shows current incoming packet statistics and
configurations for PPS control.
9.13
Storm Control
The V8102 provides a storm control feature for mass broadcast, multicast, and destina-
tion lookup failure (DLF). Generally, wrong network configuration, hardware malfunction,
virus and so on cause these kinds of mass packets. Packet storm occupies most of the
bandwidth of the network, and that causes the network very unstable.
To enable/disable the storm control, use the following command.
Command
Mode
Description
storm-control
{
broadcast
|
Interface
Enables broadcast, multicast or DLF storm control