3Com 4210 PWR Configuration Manual page 100

98 C 9: P B
HAPTER ORT ASIC
n
Limiting Traffic on
individual Ports
Enabling Flow Control
on a Port
C
ONFIGURATION
Table 57 Configure auto-negotiation speeds for a port
Operation
Configure the available
auto-negotiation speed(s) for
the port
Only ports on the front panel of the device support the auto-negotiation speed
■
configuration feature. And ports on the extended interface card do not
support this feature currently.
After you configure auto-negotiation speed(s) for a port, if you execute the
■
undo speed command or the speed auto command, the auto-negotiation
speed setting of the port restores to the default setting.
The effect of executing speed auto 10 100 1000 equals to that of executing
■
speed auto, that is, the port is configured to support all the auto-negotiation
speeds: 10 Mbps, 100 Mbps, and 1000 Mbps.
By performing the following configurations, you can limit the incoming
broadcast/multicast/unknown unicast 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.
Table 58 Limit traffic on port
Operation
Enter system view
Limit broadcast traffic
received on each port
Enter Ethernet port view
Limit broadcast traffic
received on the current port
Limit unknown multicast and
unknown unicast traffic
received on the current port
Flow control is enabled on both the local and peer switches. If congestion occurs
on the local switch:
Command
speed auto [ 10 | 100 | 1000
]*
Command
system-view
broadcast-suppression ratio Optional
interface interface-type
interface-number
broadcast-suppression {
ratio | bps max-bps }
multicast-suppression {
ratio | bps max-bps }
Remarks
Optional
By default, the port speed
■
is determined through
auto-negotiation.
Use the 1000 keyword for
■
Gigabit Ethernet ports
only.
Remarks
-
By default, the switch does
not suppress broadcast traffic.
-
Optional
By default, the switch does
not suppress broadcast traffic.
Optional
The switch will suppress the
unknown multicast and
unknown unicast traffic
simultaneously after the
configuration.
By default, the switch does
not suppress unknown
multicast and unknown
unicast traffic.