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Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter 9 Ethernet Operation
Ethernet Performance and Maintenance Screens
9.5.4 Spanning Tree Map
The Circuit screen shows forwarding spans and blocked spans on the spanning tree map.
Procedure: View the Spanning Tree Map
Step 1 On the circuit screen (Figure 9-24), double-click an Ethernet circuit.
Figure 9-24 The spanning tree map on the circuit screen
Note Green represents forwarding spans and purple represents blocked (protect) spans. If you have a
packet ring configuration, at least one span should be purple.
9.6 Ethernet Performance and Maintenance Screens
CTC provides Ethernet performance information, including line-level parameters, the amount of port
bandwidth used, and historical Ethernet statistics. CTC also includes spanning tree information, MAC
address information, and the amount of circuit bandwidth used. To view spanning tree information, see
the “Spanning Tree Parameters” section on page 9-27.
Table 9-8 Spanning Tree Configuration
Column Default Value Value Range
Priority 32768 0 - 65535
Bridge max age 20 seconds 6 - 40 seconds
Bridge Hello Time 2 seconds 1 - 10 seconds
Bridge Forward Delay 15 seconds 4 - 30 seconds