Qtech QSW-8200-28T-AC — команды MSTP: Настройка и отладка сетевых протоколов [19/23]

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User Manual

Chapter 1. Commands for MSTP 19

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 Usage Guide: According to MSTP, when topology changes, the port that send change

message clears MAC/ARP table (FLUSH). In fact it is not needed for some network

environment to do FLUSH with every topology change. At the same time, as a method

to avoid network assault, we allow the network administrator to configure FLUSH mode

by the command

 Note: For the complicated network, especially need to switch from one spanning tree

branch to another rapidly, the disable mode is not recommended.

 Example: Configure the spanning-tree flush mode once the topology change is not flush

to TC.

 Switch(config)#interface ethernet 1/0/2

 Switch(Config-If-Ethernet1/0/2)#spanning-tree tcflush disable

 Switch(Config-If-Ethernet1/0/2)#

1.1.32 spanning-tree transmit-hold-count

 Command: spanning-tree transmit-hold-count <tx-hold-count-value>

 no spanning-tree transmit-hold-count

 Function: Set the max transmit-hold-count of port.

 Parameter: tx-hold-count-value: ranging from 1 to 20, the default value is 10.

 Command mode: Global Mode

 Default: 10.

 Usage Guide: Set the max number for sending BPDU within the Hello Time interval to

control BPDU flow. The variable is used to whole MST bridge.

 Example: Set the max transmit-hold-count as 20.

 Switch(config)#spanning-tree transmit-hold-count 20

1.2 Commands for Monitor and Debug

1.2.1 debug spanning-tree

 Command: debug spanning-tree

 no debug spanning-tree

 Function: Enable the MSTP debugging information; the command “no debug spanning-

tree” disables the MSTP debugging information.

 Command mode: Admin Mode

 Usage Guide: This command is the general switch for all the MSTP debugging. Users

should enable the detailed debugging information, and then they can use this

command to display the relevant debugging information. In general, this command is

used by skilled technicians.

 Example: Enable to receive the debugging information of BPDU messages on the

port1/0/1.

 Switch#debug spanning-tree

 Switch#debug spanning-tree bpdu rx interface e1/0/1