User guide

8 Product Overview ELH100-12/24TX
A TFTP or XMODEM software download is invoked via the console
menus. A TFTP download can also be invoked via SNMP or Web-based
manager.
Non-volatile Parameter Storage
All important operating parameters, such as management data and port
configurations, are stored in non-volatile Flash memory. These values are
retained when the hub experiences power interruptions or is powered
down for normal maintenance.
Configuration and Management Interfaces
The ELH100-12/24TX hub, or attached stack, can be managed using any
of the following methods:
• Serial console, out-of-band or in-band
An RS-232 connection, using a DB-9 connector, is included on the
Agent Module for system management. Serial console management
can be performed out-of-band using a terminal or computer running
communications software. You can connect directly to the RS-232
port on the Agent Module, or make a connection via a modem. See
Chapter 3, ELH100-12/24TX User Interface, for information on
managing the ELH100-12/24TX hub (or stack) via the serial console.
You can also make an in-band connection to the RS-232 port on the
Agent Module with SLIP protocol. Using this kind of connection, you
can manage the system via any of the methods listed below.
• Telnet, in-band (over Ethernet)
The hub supports management through a Telnet connection using
the TCP/IP protocols. Telnet is performed using a terminal or
computer running communications software. See Chapter 3,
ELH100-12/24TX User Interface, for information on managing the
system via Telnet. Global user name and password protection for
changing the operating parameters of the hub is provided.
• Web-based network manager, in-band
The system can be managed over HTTP protocol with a Web
browser (Internet Explorer 3.0 or above, or Netscape Navigator 3.0
or above). Standard agent MIBs embedded in the hub provide basic
SNMP management through an embedded graphic interface.
• SNMP-based network manager, in-band
The system can also be managed using SNMP, the most common
protocol used today for network management. Standard agent MIBs
embedded in the hub provide basic SNMP management through
industry-standard SNMP applications.
Management security protection is provided based on SNMP
community names. See Chapter 6, SNMP Management, for more
information.