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Chapter 9
Ethernet Operation
Click the Provisioning > Port tabs.
Step 2
Step 3
In the left-hand column, find the applicable port number and check the Stp Enabled checkbox to enable
STP for that port.
Step 4
Click Apply.
9.5.2 Spanning Tree Parameters
Default spanning tree parameters are appropriate for most situations. Contact the Cisco Technical
Assistance Center (TAC) at 1-877-323-7368 before you change the default STP parameters.
At the node view, click the Maintenance > Etherbridge > Spanning Trees tabs to view spanning tree
parameters.
Table 9-7
BridgeID
TopoAge
TopoChanges
DesignatedRoot
RootCost
RootPort
MaxAge
HelloTime
HoldTime
ForwardDelay
9.5.3 Spanning Tree Configuration
To view the spanning tree configuration, at the node view click the Provisioning tab and Etherbridge
subtab.
November 2001
Spanning Tree Parameters
ONS 15454 unique identifier that transmits the
configuration bridge protocol data unit (BPDU); the
bridge ID is a combination of the bridge priority and
the ONS 15454 MAC address
Amount of time in seconds since the last topology
change
Number of times the spanning tree topology has been
changed since the node booted up
Identifies the spanning tree's designated root for a
particular spanning tree instance
Identifies the total path cost to the designated root
Port used to reach the root
Maximum time that received-protocol information is
retained before it is discarded
Time interval, in seconds, between the transmission of
configuration BPDUs by a bridge that is the spanning
tree root or is attempting to become the spanning tree
root
Minimum time period, in seconds, that elapses during
the transmission of configuration information on a
given port
Time spent by a port in the listening state and the
learning state
Cisco ONS 15454 Installation and Operations Guide
Spanning Tree (IEEE 802.1D)
9-27
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