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Changing passwords
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Managing with SNMP
74
IBM SAN Fibre Channel Switch: 2109 Model S16 Installation and Service Guide
The system administrator may assign different user names than those listed, if
desired. The user at a particular Security Level, however, has the same privileges
regardless of the name assigned.
The initial default password for all users is password. Modify the default password
during installation to meet the Fabric security requirements.
To change user passwords
1. Log in as admin.
2. Enter the command passwd.
Each username (admin, user) is displayed in sequence, allowing the
administrator to modify each password and name
3. Enter a password or name while a user name is displayed to replace the
existing password or name.
The resident SNMP agent allows remote switch management using IP over the
Ethernet and fibre-channel interfaces.
This chapter provides an overview of key concepts about switch management that
is based on simple network management protocol (SNMP). Refer to other
references and text books on SNMP for more detailed discussions of the protocol
and usage.
Within the SNMP model, a manageable network consists of one or more manager
systems (or network management stations), and a collection of agent systems (or
network elements).
v A manager system runs a management application that monitors and controls the
network elements
v An agent system is a network device such as a fibre-channel switch, a hub, or a
bridge, that has an agent responsible for carrying out operations requested by
the manager. Therefore, an agent is the interface to a managed device.
The manager uses SNMP to communicate with an agent. The switch agent
supports both SNMP version 1 (SNMPv1) and community-based SNMP version 2
(SNMPv2C). SNMP allows the following management activities.
v
A manager can retrieve management information, such as its identification, from
an agent. There are three operations for this activity.
– SNMP-GET
– SNMP-NEXT
– SNMP-BULKGET (SNMPv2C)
v A manager can change management information on the agent. This operation is
called SNMP-SET.
v An agent can send information to the manager without being explicitly polled for.
This operation is called a trap in SNMPv1 or a notification in SNMPv2C. Traps
and notifications alert the manager to events that occur on the agent system,
such as a restart. For the rest of the document, the term trap is used.
The information on an agent is known as the management information base (MIB).
The MIB is an abstraction of configuration and status information. A specific type or
class of management information is known as an MIB object or variable. For
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