SMC Networks SMC8624/48T manual Configuring Global Settings, 121

SPANNING TREE ALGORITHM CONFIGURATION

CLI – This command displays global STA settings, followed by settings for each port.

Console#show spanning-tree 3-228

Spanning-tree information

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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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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.

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