Limiting Traffic On Individual Ports - 3Com 4210 9-Port Configuration Manual

If you expect that 10 Mbps and 1000 Mbps are the available auto-negotiation speeds of the port,
you just need to configure speed auto 10 1000.
Follow these steps to configure auto-negotiation speeds for a port:
To do...
Enter system view
Enter Ethernet interface
view
Configure the available
auto-negotiation speed(s)
for the port
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.

Limiting Traffic on individual Ports

By performing the following configurations, you can limit the incoming broadcast/ unknown
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 1-3 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
Use the command...
system-view
interface interface-type
interface-number
speed auto [ 10 | 100 |
1000 ]*
Command
system-view
broadcast-suppression ratio
interface interface-type
interface-number
broadcast-suppression { ratio
| bps max-bps }
1-3
Remarks
—
—
Optional
By default, the port speed is
determined through auto-negotiation.
Remarks
—
Optional
By default, the switch does not
suppress broadcast traffic.
—
Optional
By default, the switch does not
suppress broadcast traffic.