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S
PANNING
T
REE
A
LGORITHM
C
ONFIGURATION
3-161
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
12
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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Eth 1/ 1 information
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Admin status: enabled
Role: disable
State: discarding
External admin path cost: 10000
Internal admin cost: 10000
External oper path cost: 10000
Internal oper path cost: 10000
Priority: 128
Designated cost: 300000
Designated port: 128.1
Designated root: 32768.0000E8AAAA00
Designated bridge: 32768.0030F1D473A0
Fast forwarding: disabled
Forward transitions: 0
Admin edge port: disabled
Oper edge port: disabled
Admin Link type: auto
Oper Link type: point-to-point
Spanning Tree Status: enabled
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12. STP and RSTP BPDUs are transmitted as untagged frames, and will cross any VLAN boundaries.