3Com Switch 7750 Configuration Guide Guide

168 CHAPTER 21: PORT BASIC CONFIGURATION
Configuring
Broadcast/Multicast/Unk
nown Unicast
Suppression
By performing the following configurations, you can limit different types of
incoming traffic on individual ports. When a type of incoming traffic exceeds the
threshold you set, the system drops the packets exceeding the traffic limit to
reduce the traffic ratio of this type to the reasonable range, so as to keep normal
network service.
n
Type-A I/O Modules, including 3C16860, 3C16861, 3C16858, and 3C16859, do
not support enabling broadcast/multicast/unknown unicast suppression on ports.
Management port Its duplex mode cannot be set.
Tabl e 98 Precautions in port rate setting
Port type Precautions in duplex mode setting
100 Mbps electrical Ethernet port
Its rate can be set to 10 Mbps or 100 Mbps as
required.
Gigabit electrical Ethernet port
Its rate can be set to 10 Mbps, 100 Mbps or
1000 Mbps as required. If its duplex mode is
set to full or half, its rate cannot be set to
1000 Mbps.
100 Mbps optical Ethernet port
Its supports the rate of 100 Mbps. Its rate can
be set to 100 Mbps or auto.
Gigabit optical Ethernet port
Its supports the rate of 1000 Mbps. Its rate
can be set to 1000 Mbps or auto.
10,000 Mbps optical Ethernet port Its rate can be set to 10,000 Mbps only.
Management port Its rate cannot be set.
Table 97 Precautions in duplex mode setting
Port type Precautions in duplex mode setting
Tabl e 99 Configure broadcast/multicast/unknown unicast suppression
Operation Command Description
Enter system view system-view -
Suppress broadcast traffic
received on all ports in the
current VLAN
broadcast-suppression {
ratio | pps pps }
Optional
By default, the switch does
not suppress broadcast traffic
Exit VLAN view quit -
Enter Ethernet port view
interface interface-type
interface-number
-
Limit broadcast traffic
received on the current port
broadcast-suppression {
ratio | bandwidth bandwidth
| pps pps }
Optional
By default, the switch does
not suppress broadcast traffic.
Limit multicast traffic received
on the current port
multicast-suppression {
ratio | bandwidth {
mbps-value | kbps kbps-value
} | pps max-pps }
Optional
By default, the switch does
not suppress multicast traffic.
Limit unknown unicast traffic
received on the current port
unicast-suppression { ratio |
bandwidth { mbps-value |
kbps kbps-value } | pps
max-pps }
Optional
By default, the switch does
not suppress unknown
unicast traffic.