Tripp Lite B092-016 - Dial-Out Failover

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5.4.2 Dial-Out Failover

TheConsoleServerscanalsobeconguredfordial-outfailover—soadial-outPPPconnectionisautomaticallysetupinthe

event of a disruption in the principal management network:

• WhenconguringtheprincipalnetworkconnectioninSystem: IP,specify Internal Modem(ortheDial Serial DB9 if

usinganexternalmodemontheConsoleport)astheFailover Interface to be used when a fault has been detected with

Network1(eth0)

• SpecifytheProbe Addressesoftwosites(thePrimary and Secondary)thattheConsoleServeristoping to determine

ifNetwork1isstilloperational

• SelecttheSystem: Dialmenuoptionandtheporttobecongured(Serial DB9 Port or Internal Modem Port)

• SelecttheBaud Rate and Flow Control that will communicate with the modem

Note: You can further conﬁgure the console/modem port (e.g. to include modem init strings) by editing /etc/mgetty.conﬁg

ﬁles as described in Chapter 13.

• ChecktheEnable Dial-Out Access box and enter the access details for the remote PPP server to be called

Note: Both SSH and HTTPS access is enabled for dial-out failover, do the administrator can SSH (or HTTPS) connect to the

console server (and its Managed Devices) and ﬁx the problem

Override DNSisavailableforPPPDevicessuchasmodems.OverrideDNSallowstheuseofalternateDNSserversfrom

thoseprovidedbyyourISP.Forexample,analternativeDNSmayberequiredforOpenDNSusedforcontentltering.

• ToenableOverride DNS,checktheOverride returned DNS Serversbox.EntertheIPoftheDNSserversintothe

spaces provided

Note: By default, the Console Server supports automatic failure-recovery back to the original state prior to failover. The

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.

Chapter 5: Firewall, Failover and Out-of-Band

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