Chapter 3: Serial Port, Device and User Configuration
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4
FIREWALL, FAILOVER & OOB ACCESS
The console server has a number of out-of-band access capabilities and transparent fail-over features, to
ensure high availability. If there’s difficulty in accessing the console server through the main network path,
all console server models provide out-of-band (OOB) access and administrators can access it and its
Managed Devices from a remote location.
•
All console server models support serially attaching an external dial-up modem and
configuring dial-in OOB access. Some models with USB ports support attaching an external
USB modem. Some models also come standard with an internal modem. These modems can
also be configured for dial-in OOB access.
•
All console server models with an internal or externally attached modem can be configured
for out-dial to be permanently connected.
•
The console server models can also be configured for transparent out-dial failover. In the
event of a disruption in the principal management network, an external dial-up ppp connection
is automatically established.
•
These console server models can also be accessed out-of-band using an alternate broadband
link and also offer transparent broadband failover.
•
Models with an internal cellular modem can be configured for OOB cellular access or for
cellular transparent failover or can be configured as a cellular router.
4.1
Dialup Modem Connection
To enable dial-in or dial-out you must first ensure there is a modem attached to the console server.
•
Models with an internal modem allow OOB dial-in access. These models display an
Internal Modem
Port
tab under
System > Dial
(as well as the
Serial DB9 Port
tab)
•
Other models also support external USB modems. The USB modem is autodetected and an
External
USB Modem Port
tab will show under
System > Dial
as well as th
e
Serial Console
tab. All console
server models support an external modem (any brand) attached via a serial cable to the
console/modem port for OOB dial-in access.
•
The serial ports on the ACM7000 are by default all configured as RJ serial console server ports. Port 1
can be configured to be the
Local Console/Modem
port.
4.2
OOB Dial-In Access
Once a modem has been attached to the console server you can configure the console server for dial-in
PPP access. The console server waits for an incoming connection from a dial-in at remote site. Next the
remote client dial-in software needs to be configured to establish the connection between an
administrator’s client modem to the dial in modem on the console server.
4.2.1 Configure Dial-In PPP
Enable PPP access on the internal or externally attached modem:
1.
Select the
System > Dial
menu option and the
Internal Modem
or
Serial Port
tab
2.
Select the
Baud Rate
and
Flow Control
that will communicate with the modem
By default, the modem port is set with software flow control and the baud rate is set at:
-
115200 baud for external modems connected to the local console port on CM7100 and
IM7200 console servers
