Configuring A Port As An Edge Port; Configuring The Path Cost Of A Port - 3Com Switch 7700 Configuration Manual

Configuring a Port as an
Edge Port
Configuring the Path
Cost of a Port
By default, the max transmission speed on every Ethernet port of the switch is 3.
An edge port refers to the port not directly connected to any switch, or indirectly
connected to a switch over the connected network.
You can configure a port as an edge port or non-edge port in the following ways.
Configuring in System View
Perform the following configuration in system view.
Table 12 Configure a Port as an Edge Port or a Non-edge Port
Operation
Configure a port as an edge port.
Configure a port as a non-edge port.
Restore the default setting, non-edge port, of
the port.
Configuring in Ethernet Port View
Perform the following configuration in Ethernet port view.
Table 13 Configure a Port as an Edge Port or a Non-edge Port
Operation
Configure a port as an edge port.
Configure a port as a non-edge port.
Restore the default setting, non-edge port, of
the port.
For more about the commands, see the Switch 7700 Command Reference Guide.
After it is configured as an edge port, the port can transit rapidly from a blocking
state to a forwarding state without any delay. In the case that BPDU protection has
not been enabled on the switch, the configured edge port will turn into non-edge
port again when it receives BPDU from the other port. In case BPDU protection is
enabled, the port will be disabled. This parameter is configured the same, and
takes effect on all the STIs.
To reenable a port that was disabled by the stp edged-port disable command,
use the undo shutdown command in port view.
It is better to configure the BPDU protection on the edge port to prevent the
switch from being attacked.
Before BPDU protection is enabled on the switch, the port runs as a non-edge port
when it receives BPDU, even if the user has set it as an edge port.
By default, all the Ethernet ports of the switch have been configured as non-edge
ports.
Path cost is related to the speed of the link connected to the port. On the MSTP
switch, a port can be configured with different path costs for different STIs. Thus
Configuring MSTP
Command
stp interface interface-list edged-port
enable
stp interface interface-list edged-port
disable
undo stp interface interface-list edged-port
Command
stp edged-port enable
stp edged-port disable
undo stp edged-port
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