Specifications

AMF Introduction and Configuration
144 New and Enhanced Features in AlliedWare Plus 5.4.4 Major and Minor Versions
Node Recovery
Automatic Node Recovery
With AMF, you can replace a failed node with another device and let AMF automatically
load the appropriate configuration onto the replacement device.
For this to work, the replacement device must have no configuration file. This means it
must be either:
■ a factory-new device, or
■ a used device that has been returned to a “clean” state (see “Restoring a Node to a
“Clean” State” on page 145)
To replace a failed device with a new device of a different platform or with a different node
name, you need to provision the network to expect the new device. See “Node
Provisioning” on page 155.
When a switch boots up, it goes through the process in the following flowchart to
determine what configuration to use. This flowchart indicates when automatic node
recovery will be successful.
Figure 16: How a switch determines which configuration to use
Is the node already congured?
Is the node connected to
an AMF network?
Does the AMF network
recognise the node?
Can the node successfully download its
conguration from the AMF master?
Download the latest backed-up or
provisioned conguration and reboot
Run the default
conguration
Run that conguration.
This may include connecting
to the AMF network
Run the safe mode
conguration
The node is now running
the desired conguration
YES
YES
YES
YES
NO
NO
NO
NO
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