User`s manual

DT-6061 User's Manual - Platform (Build 17.1)
12/14/09 Datatek Applications Inc. 44
synchronizing, thus disabling the ability to switchover from one to the other. The four and one half
minute interval allows the console operator time to investigate what the problem is and take
corrective action.
6.9.1 MODULE CONFIGURATION FOR HIGH AVAILABILITY – IPPUBLIC, IPOTHER
Syntax: ippublic <ipaddress>
ipother <ipaddress>
Before configuring a pair of DT-6061’s for high availability, they should each be configured with
their own ipaddr, and with the appropriate gateway, and submask. The two DT-6061's must
have the same gateway and must be on the same subnetwork, which is to say the IP addresses
of the two DT-6061s must have the same network ID.
High availability configuration requires choosing a third IP address, ippublic, in the same network
as the two DT-6061's. This public address is the one to be advertised to all other network
elements that might be configured to interoperate with this DT-6061 pair. High availability is
enabled by configuring each DT-6061 with both ipother (the ipaddr of the other DT-6061) and
ippublic. Each DT-6061 must then be rebooted to enter high availability mode.
Note that the local command (section 6.4.5) may be a more convenient way to change the
configuration for high availability.
If it is necessary to move the DT-6061 pair to a different subnetwork, first remove the
configuration for redundancy, setting both ippublic and ipother to none, then change the
ipaddrs of both DT-6061s (see also gateway in section 6.4.4), then reconfigure the ippublic and
ipother for the new subnetwork, then reboot.
Syntax: ippublic none
ipother none
To remove the redundancy configuration for both DT-6061s, set both ippublic and ipother to
none, or use local simplex, then reboot.
6.9.2 APPLICATION INSTALLATION AND OPERATIONAL CONFIGURATION
Software installation (install) and assignment of software to instances (app) are performed as
usual on the active DT-6061. Application and platform software must be individually registered on
both DT-6061s. The following describes how those operations are managed on the standby.
6.9.2.1 A
PPLICATION I NSTALLATION - STBYUPD
The recommended procedure for installing new application or platform software is to use the
install command on both the active and standby DT-6061. It doesn't matter which DT-6061 is
updated first. As with the standalone DT-6061, when performing install on the active, the
affected instances are automatically restarted.
As an alternative, the standby may also receive newly installed software from the active DT-
6061 by using the stbyupd command at the standby console:
Syntax: stbyupd os | sw
The sw option updates application software. If the active has been updated with platform
software, stbyupd os should be performed on the standby followed by stbyupd sw. In order for
the stbyupd sw or os commands to work properly, the current time and date must be set
properly using date and timezone [6.3.6] on the active controller. If it is not convenient or
feasible to check and maintain the current time, then it is recommended to use install to keep the