NETWORK MANGEMENT
SYSTEM
1)
NMS is used for mangling i.e. for
controlling & monitoring entities
present on network
2)
It consists of tools for monitoring &
controlling networks
3)
Components of NMS are
a)
Management station
b)
Agent station
c)
MIB
d)
Network management protocols like SNMP
4)
Role of NMS
A)
Fault management
B)
Performance management
C)
Security management
D)
Accounting
5)
Features of NMS
A)
Can be operated in centralized or distributed or
combination of both
B)
Views entire network as a whole
6) Diagram :- same to diagram of SNMP
SNMP(simple network management
protocol)
1)
SNMP
protocol based network management is used to monitor & control
networks
2)
SNMP
protocol is used to send management messages to & from manger &
managed devices
3)
SNMP system is used for managing TCP/IP based networks
COMONMENTS OF SNMP SYSTEM:-
A)
Manger
B)
Managed devices
C)
Software’s :-
i)
Agent program
ii)
Client program
iii)
NMS tools
D)
MIB
A)
Manger :- it is a console(computer )which is
used by network administrator to run
SNMP commands for monitoring & controlling network .this computer runs NMS
tools & client program
B)
Managed devices :- these are devices present on
network (ex. Router, switch ) . These
devices are monitored & controlled by manger .SNMP program running on these devices
collects & stores information about activity of these stations
C)
Software:-
i)
Agent software :- it is software which collects
information about activity of managed device
like activity log, it accepts commands from manger & runs these
commands. These software also generates Trap messages & sends to manger
ii)
Client software:- these are the software’s which
runs on manger & used to interface
with managed devices
iii)
NMS tools:- these are the software’s which are
used by manger for analyzing & monitoring traffic, throughput etc
iv)
MIB:- it is well structured database use for
storing activity information
The manager station runs
management program this program continuously monitors managed devices & it also issues certain
request for accessing activity log information from managed stations
The managed devices runs agent
program which records activity log of itself
and also responds to queries generated by management station the
managed station also generates trap massages
to inform to management station about certain problem
The managed &management
station maintains their organized database to mange &take certain decisions
& for implanting these decisions setting commands are issued by manger
SNMP MESSESGES:-
This can be done from techmax
SNMP PROTOCOL:-
1) This
is application layer protocol which is used for TCP/IP based NMS
2) This
protocol defines format & methods of message exchange between managed
devices & manger
3) This
protocol is used for
a)
Extracting updating database of agent
b)
Send & receive trap
c)
Issue setting commands
4) Messges
of SNMP are send using UDP & these
messages are :-
a)
Get request
b)
Get next request
c)
Get bulk request
d)
Set request
e)
Response
f)
Trap
g)
Info req- to another manger
h)
Report-informing to anther manger
Advantages of SNMP:-
1 ) light weight &
standardized protocol
2) portable
3) allows distributed management
4) simple
5) Scalable (expandable)
6) can be used on existing LAN
/WAN no need for new set up
7) open
8) application layer hence free
of lower layer technological details
9) requires less traffic as messages
are exchanged using UDP
Disadvantages
1) Security
gap
2) Version
problem
3) Reduces
network bandwidth
Uses of Snap
1) Monitor
device uptime
2) Inventory
of OS version of managed devices
3) Collects
interface information
4) Measuring
throughput , QOS ,Traffic
5) Queering-ARP
,database ,routing information
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Client program
iii)
NMS tools
D)
MIB
A)
Manger :- it is a console(computer )which is
used by network administrator to run
SNMP commands for monitoring & controlling network .this computer runs NMS
tools & client program
B)
Managed devices :- these are devices present on
network (ex. Router, switch ) . These
devices are monitored & controlled by manger .SNMP program running on these devices
collects & stores information about activity of these stations
C)
Software:-
i)
Agent software :- it is software which collects
information about activity of managed device
like activity log, it accepts commands from manger & runs these
commands. These software also generates Trap messages & sends to manger
ii)
Client software:- these are the software’s which
runs on manger & used to interface
with managed devices
iii)
NMS tools:- these are the software’s which are
used by manger for analyzing & monitoring traffic, throughput etc
iv)
MIB:- it is well structured database use for
storing activity information
