Opengear ACM5000, User Manual

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User Manual
Advanced Console Server & RIM Gateway User Manual
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In this mode, Network 2 (eth1) is available as the transparent back-up port to Network 1 (eth0) for accessing the
management network. Network 2 will automatically and transparently take over the work of Network 1, in the event
Network 1 becomes unavailable for any reason.
Note: Only SSH access is enabled on the failover connection. However in firmware versions later than 3.0.2 HTTPS
access is also enabled. So the administrator can then SSH (or HTTPS) connect to the console server and fix the
problem
By default, the advanced console server supports automatic failure-recovery back to the original state prior to failover
(V3.1.0 firmware and later). The advanced console server continually pings probe addresses whilst in original and failover
states. The original state will automatically be set as a priority and reestablished following three successful pings of the
probe addresses during failover. The failover state will be removed once the original state has been re-established.
Note: For firmware pre V3.1.0 the advanced console server does not support automatic failure-recovery back to the
original state prior to the failover. So 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
5.6 Cellular Modem Connection
The ACM5500, ACM5000, IM4004-5 and IM4200 family of advanced console servers support internal and/or external
cellular modem. These modems first need to be set up to validate they can connect to the carrier network. They then can
be configured for operation in Failover mode, OoB mode, Cellular router mode or CSD mode.