S
PANNING
T
REE
A
LGORITHM
C
ONFIGURATION
3-121
CLI
– This command displays global STA settings, followed by settings for
each port.
Note:
The current root port and current root cost display as zero when
this device is not connected to the network.
Configuring Global Settings
Global settings apply to the entire switch.
Command Usage
•
Spanning Tree Protocol
Uses RSTP for the internal state machine, but sends only 802.1D
BPDUs. This creates one spanning tree instance for the entire network.
If multiple VLANs are implemented on a network, the path between
specific VLAN members may be inadvertently disabled to prevent
network loops, thus isolating group members. When operating
multiple VLANs, we recommend selecting the MSTP option.
Console#show spanning-tree
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Spanning-tree information
---------------------------------------------------------------
Spanning tree mode :MSTP
Spanning tree enable/disable :enable
Instance :0
Vlans configuration :1-4094
Priority :32768
Bridge Hello Time (sec.) :2
Bridge Max Age (sec.) :20
Bridge Forward Delay (sec.) :15
Root Hello Time (sec.) :2
Root Max Age (sec.) :20
Root Forward Delay (sec.) :15
Max hops :20
Remaining hops :20
Designated Root :32768.0.0000ABCD0000
Current root port :1
Current root cost :200000
Number of topology changes :1
Last topology changes time (sec.):13380
Transmission limit :3
Path Cost Method :long
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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: ......