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Compaq Integrated Remote Console User Guide
Writer: Caroline Juszczak Project: Compaq Integrated Remote Console User Guide Comments: 281862-002
File Name: H-CH07.DOC Last Saved On: 12/21/98 11:08 AM
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
Chapter 7
Direct Connections
In a data-center environment, connecting a modem to each server may be
undesirable. For this reason, Integrated Remote Console (IRC) supports
configurations whereby access can be obtained through companion hardware,
such as a “buddy server” or terminal server. In a “buddy server” configuration,
two servers are directly connected to each other’s serial ports. If either server
fails, the other server can be used to gain out-of-band access to the failing one.
In a terminal server configuration, a cluster of servers can be connected to a
terminal server or terminal concentrator, allowing out-of-band access to any of
the servers through either a LAN (telnet) connection, or through a shared
modem or bank of modems.
For both configurations, identical concepts apply. The following section
entitled “Connecting Using a Terminal or Terminal Emulator” describes the
elements necessary to setup a direct-connection to IRC from a generic terminal
device. Additional information necessary for terminal server configurations is
found later in this chapter in the section entitled “Connecting to a Terminal
Server.”
Connecting Using a Terminal or
Terminal Emulator
The following section contains information necessary to connect IRC directly
to a terminal or terminal emulator. For simplicity, the terminal or terminal
emulator is referred to as the “terminal.”
For proper operation in direct connect mode mode, IRC requires the following:
1. A null-modem cable, with the complete set of modem control signals.
2. A terminal or terminal emulator that supports the complete set of
modem control signals, including hardware flow control, proper DTR
assertion, and DCD interpretation.