Post on 15-Nov-2014
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Central Management System and SNMP
Contents
• Why Network Management
• General Aspects on Network Management
• SNMP Simple Network Management Protocol
• Basic Function of SNMPFunction of Network
• Management via SNMP MIB Management Information Base
Why Network Management
Increasing network sizes need for navigation and monitoring tool
Increasing usage of intelligent hubs, bridges, routers, switches etc. to build structured networks complex and difficult to configure units have already integrated managment
Reduction and prevention of system downtimes
Fast and adequate reaction
Supervision of the whole network from a central point
Network Management - Existing Solutions
SNMP (Simple Network Management Protocol)
TNM (Telelecom Network Management)
SDH Management (via management bits in SDH protocol)
propriatry solutions (e.g. PANDATEL NMS based on VT100 terminal emulation)
SNMP - Simple Network Management Protocol
Basic idea: Network Management via Network itself
Using transport layer UDP and network layer IP with SLIP, PPP, Ethernet as transport medium / layer
Requires additional intelligence in network equipment
Unique network address (IP address) of each unit that is to be managed
Ethernet
Switch
SNMP Agent
SNMP Master
SNMP - Use of OSI Layers
Mmgt. Application e.g.HPOV GET Resp.
SET Resp.TRAP
GETSET
Application
UDPTransport UDP
IPNetwork IP
SNMP MIB II Enterprise MIBs
Session SNMP MIB II Enterprise MIBs
SLIP / PPP
Serial link
Ethernet
10BaseT, 10Base2
Physical&
Link
SLIP / PPP
Serial link
Ethernet
10BaseT, 10Base2
SNMP - Basic Function
Network Equipment including SNMP Software AGENT
Management Station including Management Software DOS PC or UNIX Workstation
At least 2 components are needed:
SNMP - Communication
SNMP Master
Ethernet Switch
SNMP Agent
Ethernet(10BaseT, 100 BaseT)
GETSET
TRAP
SNMP - Inband Management
SNMP Master
Ethernet Switch
SNMP Agent
GET / SET, TRAP
Ethernet(10BaseT, 100 BaseT)
SNMP - Outband Management
SNMP Master
Ethernet Switch
SNMP Agent
GET / SET, TRAP
Ethernet(10BaseT, 100 BaseT)
Serial link (SLIP / PPP)
Ethernet (10BaseT)
SNMP - General Tasks of the Network Mmgt. Station
Practical
Requests data from the agent
Sends configuration data to the agent
Reacts on Traps
Controls the managable unit(s)
Gathers information from the unit and delivers these to the Mgmt. Station on request
Generates Traps in case of unusual events
SNMP - General Tasks of the Agent
SNMP - MIBs
Database which contains all objects (variables) needed to control SNMP units
Aim: A general database which is independent from any protocol
Tree structure
Syntax: Abstract Syntax Notation One (ASN.1)
SNMP - MIBs
Global MIBs
Implemented in all SNMP agents and management systems
Contain general objects
Private MIBs
Contain specific objects of certain manufacturers
Contain specific objects of certain units
Are delivered with the agent in order to provide complete management functionality
SNMP - MIBs
MIB ID:
Any table (object) and any column / row of these tables has a unique name and a MIB ID No. inside the MIB tree
With the MIB ID No. a unique path through the MIB tree is given e.g. all PANDATEL tables can be found under 1.3.6.1.4.1.760
SNMP - General MIB Tree
PANDATEL Management - VT100 Basic Function
FH/FL
FO
GM-H
GM-S
BM-Z
G.703
HDSLVT100
ManagementStation
Mmgt.Card
Serial RS232 link
FH/FL
GM-H
GM-S
BM-Z
SubCard
RS485
FH/FL
GM-H
GM-S
BM-Z
SubCard
RS485
RS485
RS485
RS485
PANDATEL Management - Universal Rack System
PANDATEL Management - Active Management Components
PANDATEL Management - VT100 Basic Function
PANDATEL Management - VT100 Basic Features
Menu-driven VT100 management
Management of up to 48 rack cards and their remote units
maximum 96 units
DCE RS232 control port protected by password
Dial-up functionality
Standard management functions (e.g. loops, BERT)
Special management functions according to specific unit (e.g. CRC4, line speed adaption)
PANDATEL Management - VT100 Special Features
Event storage of last 256 system events (FIFO) Line status up / down I/F status up / down AIS Loop activation / deactivation
Bit-Error-Rate Testing Local unit generates bit pattern ( 2 x 10-15 ) Remote unit is set to line loop Local units generates bit-error report
Dial-up functionality Management card can be accesed via dial-up lines ( with dial-up
modem) Management card can be programmed to dial specific number in case
of alarm Dial-in is protected by password
PANDATEL Management - VT100 Special Features
SNMP basic setup
IP Address (e.g. 192.168.10.1)
Subnet (e.g. 255.255.255.0)
Five levels of access (SNMP = communities) protected by different passwords
Serial interface parameters (e.g. 9600 baud, 8 bit, no parity)
Up to 20 TRAP receivers can be programmed
PANDATEL Management - SNMP Basic Function
SNMPManagement
Station
FH/FL
FO
GM-H
GM-S
BM-Z
G.703
HDSL
Mmgt.Card FH/FL
GM-H
GM-S
BM-Z
SubCard
RS485
FH/FL
GM-H
GM-S
BM-Z
SubCard
RS485
RS485
RS485
RS485
SNMPSLIP / PPP or Ethernet
Translation
PANDATEL Management - SNMP Basic Application
PANDATEL Management - SNMP Special Features
Management Interface RS232 for SLIP or PPP with dial-up functionality 10BaseT for Ethernet protocol
Security Five different levels of access protected by different passwords Definition of up to 20 TRAP receivers
Management Functions same functionality as VT100 enhanced alarm (TRAP) messages enhanced supervision of line and I/F signals (e.g. RTS, DCD, AIS)