1 / 15

System and Network Management

System and Network Management. Network Management : ability to monitor, control and plan the resources and components of computer system and networks network management is a problem created by computer!. Goal of Management. Keeping Network Running Maintaining Network performance

dudleyj
Download Presentation

System and Network Management

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. System and Network Management • Network Management : ability to monitor, control and plan the • resources and components of computer system and networks • network management is a problem created by computer!

  2. Goal of Management • Keeping Network Running • Maintaining Network performance • Reducing the Cost of Ownership

  3. Manager Network Management Protocol agent agent agent Architecture of Management • Manager : monitor and control the agents • Agents: • softwarte componentes residing in mangaed devices • responds to requests from manager • Network Management Protocol • protocol used to communicated between Manager and agents

  4. SNMP • Easy-to-implement network management tool fot TCP/IP suite of protocols • SNMP : a collection of specification • actual protocols • definition of manage information • other related components

  5. SNMP Manager Simple Network Management Protocol SNMP agent SNMP agent SNMP agent SNMP model • SNMP components • manager, • agent and • protocol

  6. Software Components Hardware Components SNMP agent request response SNMP agent • Software process that respons to SNMP protocol • resides in networks equipments such as hub, router, bridges or workstaions • Two basic roles • monitoring • controlling

  7. SNMP agent Management Information Base SNMP Prortocol Engine response request Components of SNMP agent • Protocol engine : processing request from SNMP managers • receving request • decoding • servicing the request • sending response • Management Information Base (MIB) : collection of managed objects • each object is a data variable • standardized across system of a particular class

  8. MIB objects • Each managed object has a unique identifier, called an MIB object identifier used forreferencing an MIB object • ALL SNMP standards agents are required to support a standard set of managed objects • every MIB objects has an MIB definition that defines the managed object • MIB definitions are created using Abstract Syntax Notation One (ASN.1) • ASN.1 is a machine-independence data description (initially developed for use in OSI) • Only a subset of ASN.1 is used for SNMP • Rules for writing MIB definitions using ASN.1 are defined in Structure of Management Information (SMI)

  9. SNMP protocol

  10. SNMP operations • Get Request • Get Next Request • Get Response • Set Request • Trap

  11. Variable binding • Each SNMP variable binding consists of a variable called obkject identifier (OID) and associated value Object identifier Object value

  12. MIB Tree • Structure for referenceOID

  13. ASN.1 Notation sysContact OBJECT-TYPE SYNTAX DisplayString (SIZE (0..255)) ACCESS read-write STATUS mandatory DESCRIPTION "The textual identification of the contact person for this managed node, together with information on how to contact this person." ::= { system 4 } syscontact OID = 1.3.6.1.2.1.1.4 = iso.org.dod.internet.mgmt.mib-2.system.sycontact

  14. Basic Encoding Rule • Each field is encoded by BER Tag Length Contents • Tag : variable type • Length : length of contents • Contents : encoded data

  15. Encoding example • get request 1.3.6.1.2.1.1.1.0 30 27 sequence of 39 bytes 02 01 00 version 1 04 06 73 23 6E 6D 70 21 6 bytes of community string = #SNMP! A0 1B request of 25 bytes 02 04 23 41 3D 3E id =591478078 02 01 00 error status =0 02 01 00 error index=0 30 0E sequence of length 14 bytes 30 0C sequence of length of 12 bytes 06 08 2B 06 01 02 01 01 01 01 00 object id of 8 bytes 1.3.6.1.2.1.1.1.0 05 00 null of 0 bytes Version community str. PDU type request ID error status error index variable binding

More Related