OS6860(E)_AOS_8.1.1.R01_Switch_Management_Guide

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SNMP Overview Using SNMP SNMP Overview SNMP provides an industry standard communications model used by network administrators to manage and monitor their network devices. The SNMP model defines two components, the SNMP Manager and the SNMP Agent. Network Management Station OmniSwitch SNMP Agent SNMP Manager SNMP Network Model • The SNMP Manager resides on a workstation hosting the management application. It can query agents by using SNMP operations. An SNMP manager is commonly called a Network Management System (NMS). NMS refers to a system made up of a network device (such as a workstation) and the NMS software. It provides an interface that allows users to request data or see alarms resulting from traps or informs. It can also store data that can be used for network analysis. • The SNMP Agent is the software entity that resides within the switch on the network. It maintains the management data about a particular network device and reports this data, as needed, to the managing systems. The agent also responds to requests for data from the SNMP Manager. Along with the SNMP agent, the switch also contains Management Information Bases (MIBs). MIBs are databases of managed objects, written in the SNMP module language, which can be monitored by the NMS. The SNMP agent contains MIB variables, which have values the NMS can request or change using Get, GetNext, GetBulk, or Set operations. The agent can also send unsolicited messages (traps or informs) to the NMS to notify the manager of network conditions. SNMP Operations Devices on the network are managed through transactions between the NMS and the SNMP agent residing on the network device (i.e., switch). SNMP provides two kinds of management transactions, managerrequest/agent-response and unsolicited notifications (traps or informs) from the agent to the manager. In a manager-request/agent-response transaction, the SNMP manager sends a request packet, referred to as a Protocol Data Unit (PDU), to the SNMP agent in the switch. The SNMP agent complies with the request and sends a response PDU to the manager. The types of management requests are Get, GetNext, and GetBulk requests. These transactions are used to request information from the switch (Get, GetNext, or GetBulk) or to change the value of an object instance on the switch (Set). In an unsolicited notification, the SNMP agent in the switch sends a trap PDU to the SNMP manager to inform it that an event has occurred. The SNMP manager normally does not send confirmation to the agent acknowledging receipt of a trap. page 9-6 OmniSwitch AOS Release 8 Switch Management Guide May 2014
Using SNMP SNMP Overview Using SNMP for Switch Management The Alcatel-Lucent switch can be configured using the Command Line Interface (CLI), SNMP, or the WebView device management tool. When configuring the switch by using SNMP, an NMS application (such as Alcatel-Lucent’s OmniVista or HP OpenView) is used. Although MIB browsers vary depending on which software package is used, they all have a few things in common. The browser must compile the Alcatel-Lucent switch MIBs before it can be used to manage the switch by issuing requests and reading statistics. Each MIB must be checked for dependencies and the MIBs must be compiled in the proper order. Once the browser is properly installed and the MIBs are compiled, the browser software can be used to manage the switch. The MIB browser you use depends on the design and management requirements of your network. Detailed information on working with MIB browsers is beyond the scope of this manual. However, you must know the configuration requirements of your MIB browser or other NMS installation before you can define the system to the switch as an SNMP station. Setting Up an SNMP Management Station An SNMP management station is a workstation configured to receive SNMP traps from the switch. You must identify this station to the switch by using the snmp station CLI command. The following information is needed to define an SNMP management station. • The IP address of the SNMP management station device. • The UDP destination port number on the management station. This identifies the port to which the switch will send traps. • The SNMP version used by the switch to send traps. • A user account name that the management station will recognize. Procedures for configuring a management station can be found in “Quick Steps for Setting Up An SNMP Management Station” on page 9-3 SNMP Versions The SNMP agent in the switch can communicate with multiple managers. You can configure the switch to communicate with different management stations by using different versions of SNMP. The switch supports three versions of SNMP—v1, v2, and v3. SNMPv1 SNMPv1 is the original implementation of the SNMP protocol and network management model. It is characterized by the Get, Set, GetNext, and Trap protocol operations. SNMPv1 uses a rudimentary security system where each PDU contains information called a community string. The community string acts like a combination username and password. When you configure a device for SNMP management you normally specify one community string that provides read-write access to objects within the device and another community string that limits access to read-only. If the community string in a data unit matches one of these strings, the request is granted. If not, the request is denied. OmniSwitch AOS Release 8 Switch Management Guide May 2014 page 9-7
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Part No. 060391-10, Rev. A May 2014
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Contents About This Guide .........
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Contents Using the Switch as an FTP
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Contents Account and Password Polic
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Contents Authentication Trap ......
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Contents Firmware Upgrade Files ...
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About This Guide This OmniSwitch AO
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About This Guide Documentation Road
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About This Guide Related Documentat
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1 Logging Into the Switch Logging i
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Logging Into the Switch Quick Steps
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Logging Into the Switch Accessing t
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Logging Into the Switch Setting the
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Logging Into the Switch Using Secur
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Logging Into the Switch Modifying t
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2 Managing System Files This chapte
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Managing System Files Switch Admini
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4 Using the CLI Alcatel-Lucent’s
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Using the CLI Command Entry Rules a
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Using the CLI Command Help -> sh vl
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Using the CLI Logging CLI Commands
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5 Working With Configuration Files
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12 Managing Automatic Remote Config
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13 Configuring Virtual Chassis A Vi
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Configuring Virtual Chassis Virtual
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A Software License and Copyright St
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Alcatel-Lucent License Agreement Al
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B SNMP Trap Information This append
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SNMP Traps Table No. Trap Name Obje
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Index Symbols !! command 4-6 A aaa
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Index Network Time Protocol see NTP
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OS6860(E)_AOS_8.1.1.R01_Switch_Management_Guide

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