3Com Switch 8800 Configuration Guide
Chapter 6 Ethernet Port Configuration
6-5
Note that, the values can be consecutive, but the effective values are discrete. The
effective frame length for the FE port is 1552. The effective frame length for the GE port
and 10 GE port is 1552, 9022, 9192 and 10240. You can execute the
display interface
command to view the configured effective value for the port.
6.2.9 Setting the Ethernet Port Broadcast Suppression Ratio
You can use the following commands to restrict the broadcast traffic. Once the
broadcast traffic exceeds the value set by the user, the system will maintain an
appropriate broadcast packet ratio by discarding the overflow traffic, so as to suppress
broadcast storm, avoid suggestion and ensure the normal service. The parameter is
taken the maximum wire speed ratio of the broadcast traffic allowed on the port. The
smaller the ratio is, the smaller the broadcast traffic is allowed. If the ratio is 100%, it
means not to perform broadcast storm suppression on the port.
Perform the following configuration in Ethernet port view.
Table 6-9
Set the Ethernet port broadcast suppression ratio
Operation
Command
Set Ethernet port broadcast suppression ratio
broadcast-suppression pct
Restore the default Ethernet port broadcast
suppression ratio
undo broadcast-suppression
By default, 50% broadcast traffic is allowed to pass,
6.2.10 Setting the Ethernet Port Mode
Most ports adopt the LAN mode for general data exchange. The port must work in WAN
mode, however, if it needs special frame format for data transfer (such as in fiber
transmission). You can configure network mode available on the port using the
port-mode
command.
Perform the following configuration in Ethernet port view.
Table 6-10
Set the Ethernet port mode
Operation
Command
Set the Ethernet port mode
port-mode
{
wan
|
lan
}
Restore the default Ethernet port mode
undo port-mode
By default, the Ethernet port works in LAN mode.
Note that only GE or 10GE port supports this command.
