3Com LINKBUILDER 3C18500, User Manual

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Management over the Network 2 - 11
DUA1850-0AAA05
hub in situations where the LAN is not providing a reliable service or
the network manager does not have direct LAN connectivity.
■
Using a Telnet application.
The MSH SNMP Management Information Base (MIB)
To manage the MSH hub with an alternative SNMP network manager
you need to use the appropriate Management Information Base (MIB)
file. The MIB defines what information is available from the MSH hub
through the management module, how that information is structured,
and how the SNMP network manager can read and update it.
The MSH concise SNMP MIB file is available free on the World Wide
Web, and the ASK3Com and CardBoard bulletin boards (see
Appendix C ).
Using the VT100 Management Interface
The VT100 management interface gives a forms-based structure with
pre-defined security levels, enabling access to be restricted to particular
users.
The management interface is available to a VT100 terminal, or a PC or
workstation with a VT100 terminal emulation package. This interface
provides many of the same features as SNMP management. It must be
used to configure the MSH hub before you can manage it using an
SNMP manager or Telnet session.
You can establish VT100 management communications with the MSH
hub through two different hardware interfaces to the same forms:
■
Connect over a network link, using Telnet over TCP/IP. The MSH hub
can support up to five Telnet sessions concurrently.
Information carried over TCP/IP is not secure.
■
Connect to the RS232 port on the display panel situated across the top
of the front of the MSH hub. This is particularly useful when you cannot
get access to the MSH hub over a network link. You can connect a local