D-Link TM DES-6500 manual Lbdrecovertimer 0 value 60-1000000 This field will set

xStack DES-6500 Modular Layer 3 Chassis Ethernet Switch CLI Manual

config stp

values consistent with other devices on the bridged LAN. If the value ages out and a BPDU has still not been received from the Root Bridge, the Switch will start sending its own BPDU to all other switches for permission to become the Root Bridge. If it turns out that your switch has the lowest Bridge Identifier, it will become the Root Bridge. The user may choose a time between 6 and 40 seconds. The default value is 20.

maxhops <value 1-20>- The number of hops between devices in a spanning tree region before the BPDU (bridge protocol data unit) packet sent by the Switch will be discarded. Each switch on the hop count will reduce the hop count by one until the value reaches zero. The Switch will then discard the BDPU packet and the information held for the port will age out. The user may set a hop count from 1 to 20. The default is 20.

hellotime <value 1-10>− The user may set the time interval between transmission of configuration messages by the root device in STP, or by the designated router in RSTP, thus stating that the Switch is still functioning. A time between 1 and 10 seconds may be chosen, with a default setting of 2 seconds.

In MSTP, the spanning tree is configured by port and therefore, the hellotime must be set using the configure stp ports command for switches utilizing the Multiple Spanning Tree

	Protocol.
	forwarddelay <value 4-30>− The maximum amount of time (in
	seconds) that the root device will wait before changing states. The
	user may choose a time between 4 and 30 seconds. The default is
	15 seconds.
	txholdcount <value 1-10>- The maximum number of BDPU Hello
	packets transmitted per interval. Default value = 3.
	fbpdu [enable disable] − Allows the forwarding of STP BPDU
	packets from other network devices when STP is disabled on the
	Switch. The default is enable.
	lbd [enable disable] – Enabling this feature temporarily blocks
	STP on the Switch when a BPDU packet has been looped back to
	the Switch. When the Switch detects its own BPDU packet coming
	back, it signifies a loop on the network. STP will automatically be
	blocked and an alert will be sent to the administrator. The LBD
	STP port will restart (change to discarding state) when the LBD
	Recover Time times out. The default is enabled.
	lbd_recover_timer [0 <value 60-1000000>] - This field will set the
	time the STP port will wait before recovering the STP state set. 0
	will denote that the LBD will never time out or restart until the
	administrator personally changes it. The user may also set a time
	between 60 and 1000000 seconds. The default is 60 seconds.
Restrictions	Only administrator-level users can issue this command.

Example usage:

To configure STP with maxage 18 and maxhops of 15:

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