Accton Technology ES4710BD manual Debug spanning-tree, Mstp Troubleshooting Help

ES4710BD 10 Slots L2/L3/L4 Chassis Switch

Switch(Config-Mstp-Region)#

10.4.1.4debug spanning-tree

Command: debug spanning-tree no debug spanning-tree

Function: Enables MSTP debug information: the “no debug spanning-tree”command disables MSTP debug information.

Command mode: Admin Mode

Usage Guide: This command is the main switch for the sophisticated MSTP debugging functions, turn on the debugging information as needed in each level, then turn on the main switch to enable debugging information printouts. Debug switch in all the levels including: view MSTP running BPDU packet sending/receiving, events handling, status machine, counters, etc. The debugging information is typically used for adjustments by technicians; users can ignore such information.

Example: Enabling the debug information for receiving BPDU packets on port 1/1. Switch#debug spanning-tree

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

10.4.2MSTP Troubleshooting Help

&If MSTP is to be run in the switch, MSTP must be first enabled globally. Before enabling global MSTP, port MSTP must not allowed be enabled.

&MSTP timer parameters are related, improper configuration may render the switch unable to work properly. The relationship between the timers are:

2×(Bridge_Forward_Delay – 1.0 seconds) >= Bridge_Max_Age Bridge_Max_Age >= 2 ×(Bridge_Hello_Time + 1.0 seconds)

&When modifying MSTP parameters, the user should be aware of the resulting topology. All parameter configurations, except those bridge based global settings, are instance-based configurations, caution should be taken to ensure parameter-instance agreement during configuration.

&The MSTP function, port MAC binding and 802.1x function of ES4710BD are mutually exclusive. When MAC binding and IEEE 802.1x are configured, MSTP cannot be enabled.

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