D-Link DGS-1250 Emulator - Page 459
spanning-tree cost, spanning-tree guard root
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DGS-1250 Series Gigabit Ethernet Smart Managed Switch CLI Reference Guide Usage Guideline When a port is spanning tree enabled, the spanning tree protocol engine will either send or process the spanning tree BPDU received by the port. The command should be used with caution to prevent bridging loops. The command does not take effect if the Layer 2 protocol tunnel is enabled for STP. Example This example shows how to enable spanning tree on port 1. Switch# configure terminal Switch(config)# interface eth1/0/1 Switch(config-if)# spanning-tree state enable Switch(config-if)# 58-8 spanning-tree cost This command is used to configure the value of the port path-cost on the specified port. Use the no form of this command to revert to the auto-computed path cost. spanning-tree cost COST no spanning-tree cost Parameters COST Specifies the path cost for the port. The range is from 1 to 200000000. Default The default path cost is computed from the interface's bandwidth setting. Command Mode Interface Configuration Mode. Usage Guideline In the RSTP or STP-compatible mode, the administrative path cost is used by the single spanning-tree to accumulate the path cost to reach the Root. In the MSTP mode, the administrative path cost is used by the CIST regional root to accumulate the path cost to reach the CIST root. Example This example shows how to configure the port cost to 20000 on port 7. Switch# configure terminal Switch(config)# interface eth1/0/7 Switch(config-if)# spanning-tree cost 20000 Switch(config-if)# 58-9 spanning-tree guard root This command is used to enable the root guard mode. Use the no form of this command to revert to the default setting. 456
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