Alcatel-Lucent 6850-48 网络指南
Configuring STP Port Parameters
Configuring Spanning Tree Parameters
page 13-34
OmniSwitch AOS Release 6 Network Configuration Guide
September 2009
Configuring Port Mode
There are two port modes supported: manual and dynamic. Manual mode indicates that the port was set by
the user to a forwarding or blocking state. The port will operate in the state selected until the state is manu-
ally changed again or the port mode is changed to dynamic. Ports operating in a manual mode state do not
participate in the Spanning Tree Algorithm. Dynamic mode indicates that the active Spanning Tree Algo-
rithm will determine port state.
the user to a forwarding or blocking state. The port will operate in the state selected until the state is manu-
ally changed again or the port mode is changed to dynamic. Ports operating in a manual mode state do not
participate in the Spanning Tree Algorithm. Dynamic mode indicates that the active Spanning Tree Algo-
rithm will determine port state.
By default, Spanning Tree is enabled on the port and the port operates in the dynamic mode. If the switch
is running in the 1x1 Spanning Tree mode, then the port mode applies to the specified VLAN instance
associated with the port. If the switch is running in the flat Spanning Tree mode, then the port mode
applies across all VLANs associated with the port. The flat mode instance is specified as the port’s
instance, even if the port is associated with other VLANs.
is running in the 1x1 Spanning Tree mode, then the port mode applies to the specified VLAN instance
associated with the port. If the switch is running in the flat Spanning Tree mode, then the port mode
applies across all VLANs associated with the port. The flat mode instance is specified as the port’s
instance, even if the port is associated with other VLANs.
To change the port Spanning Tree mode for a VLAN instance, specify a VLAN ID with the
sets the mode for port 8/1 for VLAN 10 to forwarding.
-> bridge 10 8/1 mode forwarding
The explicit
command configures the port mode for a VLAN instance when
the switch is running in either mode (1x1 or flat). For example, the following command performs the same
function as the command in the previous example:
function as the command in the previous example:
-> bridge 1x1 10 8/1 mode forwarding
To change the port Spanning Tree mode for the flat mode instance, use either the
command or the
command. Note that both commands are available when the
switch is running in either mode (1x1 or flat) and an instance number is not required. For example, the
following commands configure the Spanning Tree mode on port 1/24 for the flat mode instance:
following commands configure the Spanning Tree mode on port 1/24 for the flat mode instance:
-> bridge 1/24 mode blocking
-> bridge cist 1/24 mode blocking
As in previous releases, it is possible to configure the flat mode instance with the bridge slot/port mode
command by specifying 1 as the instance number (e.g., bridge 1 1/24 mode dynamic). However, this is
only available when the switch is already running in the flat mode and STP or RSTP is the active protocol.
command by specifying 1 as the instance number (e.g., bridge 1 1/24 mode dynamic). However, this is
only available when the switch is already running in the flat mode and STP or RSTP is the active protocol.
Mode for Link Aggregate Ports
Physical ports that belong to a link aggregate do not participate in the Spanning Tree Algorithm. Instead,
the algorithm is applied to the aggregate logical link (virtual port) that represents a collection of physical
ports. To change the port mode for a link aggregate, use the bridge slot/port mode commands described
above, but specify a link aggregate control number instead of a slot and port. For example, the following
command sets the port mode for link aggregate 10 associated with VLAN 755 to blocking:
the algorithm is applied to the aggregate logical link (virtual port) that represents a collection of physical
ports. To change the port mode for a link aggregate, use the bridge slot/port mode commands described
above, but specify a link aggregate control number instead of a slot and port. For example, the following
command sets the port mode for link aggregate 10 associated with VLAN 755 to blocking:
-> bridge 755 10 mode blocking
For more information about configuring an aggregate of ports, see
and