Allied Telesis x600-24Ts/XP, x600-48Ts manual Event on Master Node Reaction on Reaction on Stack

x600 Series Layer 3 Gigabit Ethernet Switches Installation Guide

Table 10. State Change Table

Event on Master Node	Reaction on	Reaction on Stack	Reaction on Stack
	Master	Member	Member
		With Resiliency Link	Without Resiliency Link
Both stack links removed	No change	Fallback action1	Re-elect master 2
XEM-STK Removed or Faulty	No change	Fallback action1	Re-elect master 2
Hardware reset (or fault)	Reset / offline	Re-elect master	Re-elect master 2
Run the NO STACK ENABLE	No change	Fallback action1	Not allowed
command3			Displays Error Message
Software application problem	Reboot as stack	Re-elect master	Re-elect master
(lock-up or continual crashes)	member
Software crash or lock-up	Frozen4	Re-elect master	Re-elect master
Power-down or PSU failure	Powered down	Re-elect master	Re-elect master
Event on Stack Member	Reaction on	Reaction on Stack	Reaction on Stack
Node	Master	Member	Member
Both stack links removed	No change	Fallback action1	Re-elect master 2
XEM-STK removed or faulty	No change	Fallback action1	Re-elect master 2
Hardware reset (or fault)	No change	Reset/offline	Reset/offline
Run the NO STACK ENABLE	No change	Fallback action1	Fallback action1
command3
Software application failover	No change	Re-boot as slave	Reboot as stack member
(lock-up or continual crashes)
software crash or lock-up	No change	Frozen4	Frozen4
Power-down / PSU failure	No change	Powered Down	Powered down

1.The fallback action on a slave is first to run the fallback config script. Where there is no fallback script, the switch will disable all its switch ports.

2.The stack member assumes the role of stack master. In specific situations, this condition could result in a stack containing two masters. This would present problems with network management and the control of links that were previously aggregated.

3.The following situation will apply to a switch that has been removed from the stack by the using the

NO STACK ENABLE command:

—The switch will be unaware of further faults within the stack it of which it was previously a mem- ber.

—If this switch is powered cycled, all links previously shutdown will remain down as a result of running the NO STACK ENABLE command”.

4.If the slave’s ports are still up, this may cause downstream switches with trunked ports to operate incorrectly.

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