Foundry NetIron M2404C and M2404F Metro Access Switches
Configuring MSTP (Rev. 03)
Overview
© 2008 Foundry Networks, Inc
Page 43 of 70
Parameter
Description
Bridge, when it is not the Root.
DCost
The path cost of the Bridge recorded as the Root in the Root Identifier
parameter of Configuration BPDUs transmitted by the Designated
Bridge for the LAN to which the Port is attached.
This parameter is used to test the value of the Root Identifier
parameter conveyed in received Configuration BPDUs.
Designated bridge
The unique Bridge Identifier of one of the following:
The Bridge to which the Port belongs, in the case of a Designated
Port.
The Bridge believed to be the Designated Bridge for the LAN to
which this Port is attached.
This parameter is used:
Together with the Designated Port and Port Identifier parameters for
the Port to ascertain whether this Port should be the Designated Port
for the LAN to which it is attached.
To test the value of the Bridge Identifier parameter conveyed in
received Configuration BPDUs.
DPrt
The Port Identifier of the Bridge Port, on the Designated Bridge,
through which the Designated Bridge transmits the Configuration
Message information stored by this Port.
This parameter is used:
Together with the Designated Bridge and Port Identifier parameters
for the Port to ascertain whether this Port should be the Designated
Port for the LAN to which it is attached.
By management to determine the topology of the Bridged LAN.
Displaying the MSTP Instances Configuration
The
show mstp instance
command, in Privileged (Enable) mode, displays information about the
specified MST instance for a specified interface or for all the switch’s interfaces.
Table 11
describes the parameters displayed by the
show mstp instance
command.
Command Syntax
device-name
#
show mstp instance
{<
instance-id
> |
all
}
[
interface UU/SS/PP
]
Argument Description
instance-id
The MST instance ID, in the range <0 – 15>.
all
All instances
interface UU/SS/PP
(Optional). Settings of MSTP port specified by Unit/Slot/Port number.
Example
device-name
#
show mstp instance 0 interface 1/1/1
MST instance 0
Port Enable = enabled
Port Priority = 128