IBM 8239 Token-Ring Stackable Hub, Setup And User Manual

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Configuring the 8239 for Out-of-Band Connectivity
The 8239 supports out-of-band access on both models through the EIA-232 port.
You can attach either an ASCII terminal for local access or a modem for remote
access. The 8239 default settings support out-of-band connectivity. To change any
configuration settings, use the SET TERMINAL command. See “Connecting an
ASCII Terminal or Modem to the EIA-232 Port” on page 2-5 for instructions for
connecting to the EIA-232 port. See “Using the Command Interface” on page 4-1
for information about the command interface.
Configuring the 8239 for In-Band Connectivity
In-band connectivity lets you access the 8239 Model 1 from a remote station using
the Token-Ring network rather than an EIA-232 port. In order to use in-band
connectivity, the 8239 Model 1 must be configured with IP information. You can
configure IP information initially using either of these methods:
¹
BOOTP
¹
Terminal interface commands via the EIA-232 port
BOOTP
If you do not plan to use BOOTP, you should use the DISABLE BOOTP command
in order to reduce network traffic. Continue with this section only if you are
interested in in-band connectivity; otherwise, go to “Using the Command Interface”
on page 4-1.
BOOTP (boot protocol) is a user datagram protocol/internet protocol
(UDP/IP)-based protocol that allows a 8239 Model 1 to obtain IP information with
the assistance of a BOOTP server; with the IP information, the 8239 can use
in-band connectivity. The 8239 supports BOOTP to facilitate the configuration of
newly installed stacks in remote locations. Every 8239 Model 1 is shipped with the
BOOTP protocol enabled.
If your installation has only 8239 Model 2s, in-band connectivity is not supported.
Configuration Using BOOTP: A newly installed 8239 Model 1 broadcasts a
BOOTP request over IP when it is powered on or reset. The BOOTP server, using
information from its BOOTPTAB file, provides the 8239 Model 1 with configuration
information. In addition to obtaining the IP address and the subnet mask, the 8239
Model 1 can attach to a configuration server to obtain a configuration file. The
configuration file is an ASCII file containing 8239 commands. The commands are
executed as soon as the configuration file is transferred via TFTP to the 8239. The
8239 Model 1 updates its configuration with the information contained in the
BOOTP message. The following example of a BOOTPTAB file entry contains
configuration information for the 8239:
ibm8239hub1:
ha=0006298f0490:ip=200.0.0.163:sm=255.255.255.0
: gw=200.0.0.150:sa=200.0.0.150:bf=/tmp/hub1.pfl:ht=6
where
ha Is the hardware address of the 8239
ip Is the IP address of the 8239
sm Is the subnet mask of the 8239
Chapter 4. Configuration
4-5