C613-50057-01 REV A
Command Reference for AT-IX5-28GPX High Availability, High Power Video Surveillance PoE Switch
1891
AlliedWare Plus™ Operating System - Version 5.4.5-0.x
S
TACKING
C
OMMANDS
STACK
RESILIENCYLINK
stack resiliencylink
Overview
This command configures the resiliency link used by the stack. The interface used
may be either an eth port or is a dedicated VLAN (resiliencylink VLAN) to which
switch ports may become members. This VLAN is dedicated to the resiliency link
function and must not be the stack management VLAN.
Syntax
stack resiliencylink
<interface
>
no stack resiliencylink
Mode
Global Configuration
Usage
The resiliency-link is only used when a backup member loses connectivity with the
master via the stacking cables. Such a communication loss would occur if:
•
a stacking link is removed or fails
•
two or more stacking link cables are unplugged or fail
•
the stack master itself fails due to a reboot or power failure
The resiliency-link allows the backup member to determine if the master is still
present in the network by the reception of healthcheck messages sent by the
master over the resiliency-link interface.
CAUTION
:
The purpose of the resiliency link is to enable the backup master to check the
status of the master under fault conditions. If the resiliency link is not configured, and
the master loses communication with its other stack member, then the stack will
assume the master is NOT present in the network, which could cause network conflicts
if the master is still online. Note that this is different to stacking operation in releases
prior to version 5.3.1.
Reply healthcheck messages are received if the master is still online, but the stack will
now split into two different “stubs”. The stub containing the existing master will
continue operating as normal. The members in the masterless stub will now use a “type
stack disabled-master” trigger to run a configuration to form a second temporary
stack. This utilizes the remaining stack members' resources without conflicting directly
with the master's configuration. If no “type stack disabled-master” trigger was
configured on the switches, then the masterless stub members will disable their switch
ports.
If no healthcheck messages are received, then the master is assumed to be completely
offline, and so the other stack members can safely take over the master's configuration.
CAUTION
:
The purpose of the resiliency link is to enable the stack members (particularly
the backup master) to check the status of the master under fault conditions. If the
resiliency link is not configured, and the master loses communication with its other
Parameters
Description
<interface>
The name of the interface that is connected to the resiliency
link.
This may be either the eth port or the resiliencylink VLAN.
