Stacking Commands
©2008 Allied Telesis Inc. All rights reserved.
65.18
AlliedWare Plus
TM
Operating System Software Reference C613-50003-00 REV E
Software Version 5.2.1
stack fallback-config
This command is used to set the fallback configuration file to use if the stack splits into stubs
due to connectivity failures.
Syntax
stack fallback-config
URL
no stack fallback-config
Mode
Global Configuration Mode
Usage
This command is used to select the fallback configuration file to be used if a connectivity fault
causes the stack splits into stubs. The stack splits into stubs when:
■
connectivity is lost between stack members and the stack master across the inter-stack
connection.
■
the stack master is assumed to still online but is no longer reachable by all stack members.
In a stub scenario, the remaining stack members cannot use the same stack configuration,
because this will result in potential configuration conflicts, particularly where static channels
terminate on different stacking units.
The fallback-config allows the remaining stack members to continue processing network traffic
to some degree, without clashing with the existing stack's configuration. Configuring a fallback-
configuration also means that the isolated stub members can still be accessible via a
management IP address, and so can be re-configured on the fly.
Caution: It is important that any ports that are configured as trunked ports across master and slave
stack members are disabled at their slave termination when operating in the fallback
configuration. Otherwise the trunked ports will not function correctly on the switch
connected downstream.
Examples
The following example of a stack configuration file is shown for completeness:
member-id=5
priority=128
mgmt-vlan=4094
mgmt-subnet=192.168.255.0
auto-upgrade=true
Related Commands
stack resiliencylink
Parameter
Description
stack
Virtual Chassis Stacking (VCS)
fallback-config
the stack stub configuration to use if the stack master fails
URL
The URL of the stack fallback configuration file
no
Negates the operation of the stack fallback-config command
awplus#
configure terminal
awplus(config)#
stack fallback-config flash:/stk_stb.conf