Allied Telesis x600-48Ts/XP - Manual (Page 43)

x600 Series Layer 3 Gigabit Ethernet Switches Installation Guide
43
Table 9. State Change Table
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
a. The switch will be unaware of further faults within the stack it was previously a
member of.
b. Should this switch then be powered down, all links previously shutdown (as a
result of running the “no stack enable command”) will remain down.
4. If the slave’s ports are still up, this may cause downstream switches with trunked ports
to operate incorrectly.
Event on Master Node
Reaction on
Master
Reaction on Stack
Member
Reaction on Stack
Member
With Resiliency Link Without Resiliency Link
Both stack links removed No change
Fallback action 1 Re-elect master 2
XEM-STK Removed or Faulty No change
Fallback action 1 Re-elect master 2
Hardware reset (or fault) Reset / offline Re-elect master
Re-elect master 2
Run the no stack enable
command
3
No change
Fallback action 1 Not allowed
Displays Error Message
Software application problem
(lock-up or continual crashes) Reboot as stack
member Re-elect master Re-elect master
Software crash or lock-up
Frozen
4 Re-elect master Re-elect master
Power-down or PSU failure Powered down Re-elect master Re-elect master
Event on Stack Member
Node
Reaction on
Master
Reaction on Stack
Member
Reaction on Stack
Member
Both stack links removed No change
Fallback action
1
Re-elect master
2
XEM-STK removed or faulty No change
Fallback action
1
Re-elect master
2
Hardware reset (or fault) No change Reset/offline Reset/offline
Run the no stack enable
command
3
No change
Fallback action 1 Fallback action 1
Software application failover
(lock-up or continual crashes) No change Re-boot as slave Reboot as stack member
software crash or lock-up No change
Frozen 4 Frozen 4
Power-down / PSU failure No change Powered Down Powered down