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Команды для mstp Страница: 14

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QSW-8200-28T-AC
Команды для mstp Страница: 14

Qtech QSW-8200-28T-AC — руководство пользователя по командам MSTP для сетевых устройств [14/23]

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Qtech QSW-8200-52T-AC-DC Команды для mstp онлайн [14/23] 481624

User Manual

Chapter 1. Commands for MSTP 14

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with 4 ports

10Gbps

Full- duplex

aggregation link

with 2 ports

aggregation link

with 3 ports

aggregation link

with 4 ports

2,000

1,000

666

500

 Usage Guide: By setting the port cost, users can control the cost from the current port

to the root bridge in order to control the elections of root port and the designated port

of the instance.

 Example: On the port1/0/2, set the MSTP port cost in the instance 2 to 3000000.

 Switch(Config-If-Ethernet1/0/2)#spanning-tree mst 2 cost 3000000

1.1.21 spanning-tree cost-format

 Command: spanning-tree cost-format {dot1d | dot1t}

 Function: In global mode, users can select path-cost format with dot1d or dot1t, the

default format is dot1t.

 Command Mode: Global mode.

 Default: count path-cost with dot1t format.

 Usage Guide: There are two formats about cost value: they are dot1d marked on

IEEE802.1d-2008 and dot1t marked on IEEE802.1t, but path-cost ranges of them are

different, dot1d range from 1 to 65535, and dot1t range from 1 to 200,000,000.

 If users already configured the cost value of link with spanning-tree cost command

manually, changing path-cost format with cost-format command is successful after the

previous configuration is cleared only.

 Example: Set the cost format in global mode

 Switch(config)#spanning-tree cost-format dot1d

1.1.22 spanning-tree mst loopguard

 Command: spanning-tree [mst <instance-id>] loopguard

 no spanning-tree [mst <instance-id>] loopguard

 Function: Enable the loopguard function for specified instance, the no command

disables this function.

 Parameter: <instance-id>: MSTP instance ID.

 Command mode: Port Mode.

 Default: Disable loopguard function.

Qtech QSW-8200-28T-AC — руководство пользователя по командам MSTP для сетевых устройств [14/23]

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