SNMP Simple Network Management Protocol Haris Ribic
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SNMP SNMP Simple Network Management Simple Network Management Protocol Protocol Haris Ribic
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SNMP Simple Network Management Protocol Haris Ribic. Objectives. History What is SNMP? Management Station Management Agent Management Information Base Network Management Protocol How does SNMP work? Architecture Bibliography. History. Networks became vital and more complicated - PowerPoint PPT Presentation
Transcript of SNMP Simple Network Management Protocol Haris Ribic
SNMPSNMP
Simple Network Management ProtocolSimple Network Management Protocol
Haris Ribic
ObjectivesObjectives
History
What is SNMP?
Management Station
Management Agent
Management Information Base
Network Management Protocol
How does SNMP work?
Architecture
Bibliography
HistoryHistory Networks became vital and more complicated
Cannot be managed by human effort alone
Simple Gateway Monitoring Protocol (SGMP) Did not work with equipment from different vendors
Internet Activities Board (IAB) - Network Management System Need for an automated management tool for TCP/IP network and Internet
Standards required to allow multi-vendor networks
View the entire network as a unified architecture
Single operator interface
Powerful, user friendly command set
SNMP - RFC 1067 - August 1988» J. Case
» M. Fedor
» M. Schoffstall
» J. Davin
What is SNMP?What is SNMP? Network management software for networks operating TCP/IP model
Application Layer TCP/IP - OSI
Variety of Operating Systems
SNMP network management - 4 key elements
Management Station
Management Agent
Management Information Base
Network Management Protocol
Simple Network Management Protocol version 1 (SNMPv1)
- Protocol that enables a management station to configure, monitor network devices
Simple Network Management Protocol version 2 (SNMPv2)
- Update provides additional administrative structure, authentication, and privacy
- SNMPv1 and SNMPv2 are incompatible
Simple Network Management Protocol version 3 (SNMPv3)
- Update provides additional security and administrative capabilities
Management StationManagement Station Standalone device or part of a shared system
Interface for human network manager
Has management applications
Interface to monitor and control network
Platforms, such as hosts, bridges, routers, and hubs
Equipped with agent software so they can be managed Responds to requests for information Responds to requests for action Asynchronously supply important but unsolicited information
Management AgentManagement Agent
Management Information Base (MIB)Management Information Base (MIB) Representation of network resources as objects
Each object is a data variable that represents one aspect of managed agent Standardized across system
Collection of objects is referred to as a MIB Collection of access points for the management station
Management station Retrieves values of MIB objects to provide monitoring
Sets MIB object values to change configuration
Link between management station and agent TCP/IP uses SNMP SNMPv2 for OSI & TCP/IP
Key capabilities get - management station retrieves value set - management station sets value notify - agent sends event notification
Network Management ProtocolNetwork Management Protocol
How does SNMP work?How does SNMP work?
Network management software Controls devices connected to a network
Manages performance, solves problems, optimizes network
Firewall
Community Devices store information about the community
Command input limited to certain machines
MIB contains communication information
Protocols
Device identifications
Application-level protocol of the TCP/IP model
Operates on top of UDP
Typical configuration: Standalone management station
Manager process controls access to a central MIB
Provides an interface to the network manager
SNMP, UDP, IP and network dependent protocol (Ethernet, ATM) Each agent must be implemented same way
SNMP ArchitectureSNMP Architecture
Closer look: Management station issues 3 messages
All 3 are acknowledged by the agent
May issue a trap message - something undesirable happens
Relies on UDP - connectionless protocol No ongoing connections are maintained
Each exchange is a separate transaction
SNMP ArchitectureSNMP Architecture
BibliographyBibliography
Pictures:
Stallings, William. Data and Computer Communications. 8th ed. New Jersey: Pearson Prentice Hall, 2007. 760-771.
Information:
Stallings, William. Data and Computer Communications. 8th ed. New Jersey: Pearson Prentice Hall, 2007. 760-771.
"Cisco Documentation." cisco.com. 12 Oct. 2006. Feb. 2008 <http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/snmp.htm>.
"Simple Network Management Protocol." Wikipedia. 10 Jan. 2008. Feb. 2008 <http://en.wikipedia.org/wiki/Simple_Network_Management_Protocol#SNMP_basic_components>.
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