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On the
Management LAN Interface
-‐
Network 2,
configure the
IP Address
/
Subnet Mask
/
Gateway
the same as
Network Interface
-‐
Network 1
.
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, if Network 1 becomes unavailable for any reason. When Network 1 becomes available
again, it takes over the work again.
5.4 Dial-‐Out Failover
The internal or externally attached modem on the
console server
can be set up either
-‐ in
Failover mode
where a dial-‐out connection is only established in event of a
ping
failure, or
-‐ with the dial-‐out connection is always on
In both of the above cases in the event of a disruption in the dial-‐out connection, the console server will
endeavor to re-‐establish the connection.
5.4.1 Always-‐on dial-‐out
The
console server
modem can be configured for out-‐dial to be always on, with a permanent external
dial-‐up ppp connection.
Select the
System: Dial
menu option and check
Enable Dial-‐Out
to allow outgoing modem
communications
Select the
Baud Rate
an
d Flow Control
that will communicate with the modem
In the
Dial-‐Out Settings -‐ Always On Out-‐of-‐Band
field enter the access details for the remote
PPP server to be called
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 filtering.
To enable
Override DNS
, check the Override returned DNS Servers box. Enter the IP of the DNS
servers into the spaces provided.