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S
PANNING
T
REE
A
LGORITHM
C
ONFIGURATION
3-119
•
Configuration Changes
– The number of times the Spanning Tree
has been reconfigured.
•
Last Topology Change
– Time since the Spanning Tree was last
reconfigured.
These additional parameters are only displayed for the CLI:
•
Spanning tree mode
– Specifies the type of spanning tree used on this
switch:
-
STP
: Spanning Tree Protocol (IEEE 802.1D)
-
RSTP
: Rapid Spanning Tree (IEEE 802.1w)
-
MSTP
: Multiple Spanning Tree (IEEE 802.1s)
•
Instance
– Instance identifier of this spanning tree. (This is always 0
for the CIST.)
•
Vlans configuration
– VLANs assigned to the CIST.
•
Priority
– Bridge priority is used in selecting the root device, root port,
and designated port. The device with the highest priority becomes the
STA root device. However, if all devices have the same priority, the
device with the lowest MAC address will then become the root device.
•
Root Hello Time
– Interval (in seconds) at which this device
transmits a configuration message.
•
Root Maximum Age
– The maximum time (in seconds) this device
can wait without receiving a configuration message before attempting
to reconfigure. All device ports (except for designated ports) should
receive configuration messages at regular intervals. If the root port ages
out STA information (provided in the last configuration message), a
new root port is selected from among the device ports attached to the
network. (References to “ports” in this section means “interfaces,”
which includes both ports and trunks.)
•
Root Forward Delay
– The maximum time (in seconds) this device
will wait before changing states (i.e., discarding to learning to
forwarding). This delay is required because every device must receive
information about topology changes before it starts to forward frames.
In addition, each port needs time to listen for conflicting information
Summary of Contents for 8648T - annexe 1
Page 2: ......
Page 34: ...INTRODUCTION 1 10 ...
Page 48: ...INITIAL CONFIGURATION 2 14 ...
Page 159: ...PORT CONFIGURATION 3 111 Figure 3 48 Displaying Etherlike and RMON Statistics ...
Page 411: ...DNS COMMANDS 4 167 ...
Page 536: ...COMMAND LINE INTERFACE 4 291 ...
Page 542: ...TROUBLESHOOTING B 2 ...
Page 555: ......