AAM1212-51/53 Series User’s Guide
174
Chapter 22 Spanning Tree Protocol
The following table describes the labels in this screen.
Table 50
Spanning Tree Protocol Status
LABEL
DESCRIPTION
STP Config
Click
STP Config
to modify the AAM1212’s STP settings (see
).
Spanning Tree
Protocol
This field displays
On
if STP is activated. Otherwise, it displays
Off
.
Bridge Status
If STP is activated, the following fields appear. If STP is not activated,
Disabled
appears.
Our bridge ID
This is the unique identifier for this bridge, consisting of bridge priority plus MAC
address. This ID is the same in
Designated root ID
if the AAM1212 is the root
switch.
Designated root ID
This is the unique identifier for the root bridge, consisting of bridge priority plus
MAC address. This ID is the same in
Our bridge ID
if the AAM1212 is the root
switch.
Topology change
times
This is the number of times the spanning tree has been reconfigured.
Time since change
This is the time since the spanning tree was last reconfigured.
Cost to root
This is the path cost from the root port on this switch to the root switch.
Root port ID
This is the priority and number of the port on the switch through which this switch
must communicate with the root of the Spanning Tree. “0x0000” displays when
this device is the root switch.
Root max age
(second)
This is the maximum time (in seconds) the root switch can wait without receiving
a configuration message before attempting to reconfigure.
Root hello time
(second)
This is the time interval (in seconds) at which the root switch transmits a
configuration message. The root bridge determines
Hello Time,
Max Age
and
Forwarding Delay
.
Root forward delay
(second)
This is the time (in seconds) the root switch will wait before changing states (that
is, listening to learning to forwarding).
Max age (second)
This is the maximum time (in seconds) the AAM1212 can wait without receiving
a configuration message before attempting to reconfigure.
Hello time (second)
This is the time interval (in seconds) at which the AAM1212 transmits a
configuration message. The root bridge determines
Hello Time,
Max Age
and
Forwarding Delay
.
Forward delay
(second)
This is the time (in seconds) the AAM1212 will wait before changing states (that
is, listening to learning to forwarding).
Port Status
This identifies the AAM1212’s ports that support the use of STP. If STP is
activated, the following fields appear. If STP is not activated,
Disabled
appears.
State
This field displays the port’s RSTP (or STP) state. With RSTP, the state can be
discarding
,
learning
or
forwarding
. With STP, the state can be
disabled
,
blocking
,
listening
,
learning
, or
forwarding
.
Disabled
appears when RSTP has not been turned on for the individual port or
the whole device.
Port ID
This is the priority and number of the port on the switch through which this switch
must communicate with the root of the Spanning Tree. “0x0000” displays when
this device is the root switch.
Path cost
This is the path cost from this port to the root switch.
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