Extended Switch Status:
10300 OK output (1 = on/no alarm, 0 = off/alarm)
10301 First power input active (1 = P1 on, 0 = P1 off)
10302 Second power input active (1 = P2 on, 0 = P2 off)
SNMP Notifications
SNMP (Simple Network Management Protocol) and RMON (Remote Monitoring) provide
a means to monitor and manage your network. Each SNMP device maintains Management
Information Bases (MIBs) containing information about the operation and configuration of
the device.
The MIBs can be accessed with SNMP tools ranging from simple command-line tools like
snmpwalk and snmpget (part of the open source Net-SNMP package available at http://
www.net-snmp.org) to commercial network management products from various vendors. Key
information from the MIBs is also available via the switch’s terminal and web interfaces.
The MIBs are divided into groups of related objects. Objects may be scalar (having only a
single value) or tabular (having a list of values varying over time, by port number, etc.).
SNMP Security:
SNMP provides several options for securing access to MIBs. SNMPv1 and SNMPv2 provide
only weak authentication. SNMPv3 uses encryption to add stronger authentication as well as
privacy. In all versions, you may configure read-only and read/write users.
SNMPv1 and SNMPv2 authenticate users with a “community string” which is sent in clear
text (unencrypted) and no password is required. Some measure of security can be achieved by
setting long, obscure community strings.
SNMPv3 provides three levels of security and encryption:
• None: No password is required to read or write values in the MIB.
• Authentication: A password is required and is used to encrypt the user credentials so that security
information is not sent in clear text. A variation of MD5 is used for encryption.
• Privacy: A password is required and is used to encrypt the user credentials. A second password is
used to encrypt the details of the SNMP request using DES encryption.
For SNMPv3 access, the managed switch requires authentication and allows privacy. Only
one password is configurable and it is used for both authentication and privacy.
The following examples use snmpget from the Net-SNMP tools to illustrate the use of
authentication and privacy when accessing the managed switch.
If SNMPv2 access is enabled, values may be read without a password with a command like:
snmpget -v 2c -c public 10.2.0.1 system.sysDescr.0
If SNMPv3 access is enabled, values may be read with a command like the following (entered
all on one line):
NOTE: This product uses Net-SNMP (available from www.net-snmp.org) which is subject to the copyrights and license
found at: http://www.net-snmp.org/COPYING.txt
4-65
Chapter 4 - Managed Switch Software Setup
Stride Industrial Ethernet Switches User Manual 2nd Ed. Rev. A
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