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05-4446A01, Rev. C
Mercury Reference Manual
165
6.3
NOTES ON SNMP
6.3.1 Overview
The firmware release described in this manual contains changes to the
transceiver’s SNMP Agent, several new MIB variables, and new Agent
configuration options. This guide reviews the changes and shows how
to properly configure the Agent to take advantage of these new features.
SNMPv3 Support
The updated SNMP Agent now supports SNMP version 3 (SNMPv3).
The SNMPv3 protocol introduces Authentication (MD5/SHA-1),
Encryption (DES), the USM User Table, and View-Based Access (refer
to RFC2574 for full details). The SNMP Agent has limited SNMPv3
support in the following areas:
• Only MD5 Authentication is supported (no SHA-1). SNMPv3
provides support for MD5 and SHA-1.
• Limited USM User Table Manipulation. The SNMP Agent
starts with 5 default accounts. New accounts can be added
(SNMPv3 adds new accounts by cloning existing ones), but
they will be volatile (will not survive a power-cycle).
New views cannot be configured on the SNMP Agent. Views are
inherited for new accounts from the account that was cloned.
The SNMP Agent uses one password pair (Authentication/Pri-
vacy) for all accounts. This means that when the passwords
change for one user, they change for all users.
SNMPv3 Accounts
The following default accounts are available for the SNMP Agent:
enc_mdsadmin
—Read/write account using Authentication and Encryp-
tion.
auth_mdsadmin
—Read/write account using Authentication.
enc_mdsviewer
—Read only account using Authentication and Encryp-
tion.
auth_mdsviewer
—Read only account using Authentication.
def_mdsviewer
—Read only account with no Authentication or Encryp-
tion.
Context Names
The following Context Names are used (refer to RFC2574 for full
details):
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