Specifications

Communication Status Information
resources within the hierarchy indented appropriately to indicate dependency relationships between
resources.
The BACKUP column indicates the next system in the failover priority order, after the system for
which the status display pertains. If the target system is the lowest priority system for a given
resource, the BACKUP column for that resource contains dashes (for example, ------).
l TAG column. Contains the root tag for the resource.
l ID column. Contains each resource’s identifier string.
l STATE column. Contains the current state of each resource, as described in Resource
States.
l PRIO column. Contains the failover priority value of the local server, for each resource.
l PRIMARY column. Contains the name of the server with the highest priority, for each
resource.
Communication Status Information
This section of the display lists each communications path that has been defined on the target
system. For each path, the following information is provided.
l MACHINE. Remote server name for the communications path.
l NETWORK. The type of communications path (TCP or TTY)
l ADDRESSES/DEVICE. The pair of IP addresses or device name for the communications
path
l STATE. The state of the communications path (ALIVE or DEAD)
l PRIO. For TCP paths, the assigned priority of the path. For TTY paths, this column will
contain dashes
(----), since TTY paths do not have an assigned priority.
Fault Detection and Recovery Scenarios
To demonstrate how the various LifeKeeper components work together to provide fault detection and
recovery, see the following topics that illustrate and describe three types of recovery scenarios:
IP Local Recovery
SIOS recommends the use of bonded interfaces via the standard Linux NIC bonding mechanismin
any LifeKeeper release where a backup interface is required. Beginning with LifeKeeper Release
7.4.0, bonded interfacing is the only supported method.For releases prior to 7.4.0, the backup
interface feature in the IP kit, described below, can be used.
The IP local recovery feature allows LifeKeeper to move a protected IP address from the interface on
which it is currently configured to another interface in the same server when a failure has been
detected by the IP Recovery Kit. Local recovery provides you an optional backup mechanism so that
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