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FIGURE 6-7. SYSTEM IP: FAILOVER INTERFACE TAB
In this mode, the Management LAN Interface is available as the transparent back-up port to Network Interface for accessing the
management network. Management LAN Interface will automatically and transparently take over the work of Network Interface, if the
Network Interface becomes unavailable for any reason.
NOTE: In console servers running firmware v3.0.1 and earlier, only SSH access is enabled on the failover connection. In firmware
versions 3.0.2 and later, HTTPS access is also enabled. Once the dial-out PPP connection is established, the administrator
can connect to the console server via SSH (or HTTPS on console servers running firmware 3.0.2 or later) and fix the problem.
As of firmware v3.1.0 and later, the advanced console server, by default, supports automatic failure-recovery back to the state prior
to the failover. The advanced console server continually pings probe addresses while in original and failover states. The original state
will automatically be set as a priority and re-established following three successful pings of the probe addresses during failover. The
failover state will be removed once the original state has been re-established.
For firmware versions prior to v3.1.0 the advanced console server does not support automatic failure-recovery back to the original
state prior to the failover. To restore networking to a recovered state, the following command then needs to be run:
rm -f /var/run/*-failed-over && config -r ipconfig
If required, you can run a custom bash script when the device fails over. It is possible to use this script to implement automatic failure
recovery, depending on your network setup. The script to create is:
/etc/config/scripts/interface-failover-alert
CHAPTER 6: FIREWALL, FAILOVER AND OOB ACCESS
