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Transcript of Manchester University Tiny Network Element Monitor (MUTiny NEM) A Network/Systems Management Tool...
![Page 1: Manchester University Tiny Network Element Monitor (MUTiny NEM) A Network/Systems Management Tool Dave McClenaghan, Manchester Computing George Neisser,](https://reader036.fdocuments.net/reader036/viewer/2022062409/5697bf921a28abf838c8f2fa/html5/thumbnails/1.jpg)
Manchester University Tiny Network Element Monitor(MUTiny NEM)
A Network/Systems Management Tool
Dave McClenaghan, Manchester Computing George Neisser, Manchester Computing
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1. Introduction.MUTiny Overview. - Runs on commodity hardware.
- Coded in Perl, Perl/Tk.
- Easy to install, use and maintain.
- Free (unsupported) to academia.
- Subject to ongoing development.
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Network Management Overview.NMS Components:
- A Manager, running NM applications.
- A set of managed nodes. (The managed domain)
- Defined management information (MIBs).
- A Network Management protocol (SNMP).
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2. The MUTiny NM Model.
Platform:
PC (Running Linux).
Description:
A Network/Systems Management tool. Coded entirely in Perl and Perl/Tk.
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MUTiny Applications.
- A Network Element Monitor/Manager.
- A Unix Systems Monitor/Manager.
- A MIB data collection and reporting tool.
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MUTiny NM Applications.
- Graphically display the domain topology. - Monitor and report node status changes.
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MUTiny NM Applications (continued).
- Display monitored node information. - Collect and report network statistics.
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MUTiny Network Management.
Key areas:
- Domain Management.
- Event Management.
- Network Statistics.
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MUTiny NEM front end. _menu bar
_host attributes
_domain status
_topology display
_session bar
The GUI
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2.1 Domain Management.
The Managed Domain. The set of all monitored nodes.
Monitored Node. Any network device, router, switch, etc. That is regularly polled for management information.
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Domain Topology Display.
ICMP Status
(Background)
Green OK. Red No Echo. Amber Problem. Clear Unknown.
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Domain Topology Display.
SNMP Status
(Foreground)
Black OK. Blue No SNMP. Grey Unknown.
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Topology Management.
The initial domain topology display
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Topology Management.
Add Node Window - No Auto-Discovery, nodes added by choice.
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Topology Management.
- Node and ‘path’ nodes are added to the display.
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Topology Management.
- Path is determined by traceroute.
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Topology Management.
Change Symbol/Label Window
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Connectivity Status Polling.
ICMP connectivity determined by ping. SNMP connectivity determined by sysUpTime.
Management Station
Monitored Node IF’s
ICMP
SNMP Agent
MUTiny ICMPNEM nemPoll SNMP
sysUpTime
nemStatusTable
nemPoll.conf
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Configuring Status Poll Parameters.
Figure 2.2a Interface Polling Parameters
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Configuring Status Poll Parameters.
Figure 2.2b General Polling Parameters - Fully configurable polling. - Poll ‘Back Off’ options.
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4.2 Event Management.Event Definition.
2.2 Event Management
Connectivity Events.
ICMP:Node_No_Echo
ICMP:Node_OK
ICMP:Node_Problem
ICMP:Status_Unknown
SNMP:No_Response
SNMP:OK
SNMP:Status_Unknown
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Network Event Logging.
Figure 2.3a Network Event Log Window
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Network Event Alarms.
Figure 2.3b A Pop-Up Alarm
Pop-Ups may be accompanied with an optional Audible_Alarm (bell).
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Event/Action Management.*
Event Configuration Window
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Event/Action Management.*
Event/Source Configuration Window
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Event Time Frames.
Contact/Frame Configuration Window
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2.3 Network Statistics.MIB Data Collection.
Figure 2.4 MIB Data Collection Mechanism Data stored in: */nemdata/mibdata/<yearmon>/<Datafile>
Management Station
Monitored Node (hostname)
SNMP Agent
MUTiny NEM
nemDataPoll
Datafiles
nemDataPoll.conf
MIB Data
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Data Storage.
Time Object Value PI 953036400 ifOutOctets.6 84118 60 953036400 ifOutOctets.7 13275 60 953037000 ifInOctets.8 7219 60 953037000 ifInOctets.5 14303 60 953037000 ifInOctets.6 18287 60
Sample data stored in: */nemdata/mibdata/200002/gw-site
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Configuring MIB Data Collection.
Figure 2.5a Collection Configuration Window
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Node Data Collection.
Figure 2.5b Node Collection Window
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Node Data Collection. The Storage Interval. A multiple of the sampling-interval, eg.
samp-int = 60 seconds store-int = 15 min
- This greatly reduces the amount of disk space required to store the data ( by a factor of 15 in this case ).
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Node Data Collection. The Store-Identifier.
The store-id, if set, stores object-id as:
<mib-obj>.<store-id>
eg.ifInOctets.Liv3
- Useful if instance-id prone to change.
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Node Data Collection.
Test Collection Window
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‘Change Control’.*
‘Anchors’ collection to IP_addr or Phys_addr
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Reporting Network Statistics.
Figure 4.11 The Reporting Mechanism.
The reports are generated from user-defined Report Parameter Files (RPF’s).
# nemReport -r my.rpf
nemDatafiles Reports ( *.rpt )
nemReport
Report Parameter Files
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Reporting Network Statistics.
The Report Template.
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Reporting Network Statistics.
Figure 4.12b Sample ‘Fixed Column’ Report
- Variable and graphical* formats supported.
Report Name: liv_traffic_251099.rptReport Date: Wed Nov 10 13:00:55 GMT 1999Host Name: gw-liv.netnw.net.ukMIB Objects: ifInOctets ifOutOctets
-------InBytes.138-------- -------OutBytes.138------- -------(Bytes/sec)-------- -------(Bytes/sec)--------Date From To Average Max MaxT Average Max MaxT10/25/99 08:00 09:00 37575.64 358257.00 08:15 7254.06 31816.40 08:3010/25/99 09:00 10:00 48182.86 102154.00 09:02 11811.73 59364.60 09:3910/25/99 10:00 11:00 63443.69 123937.00 10:22 16965.79 41818.30 10:4810/25/99 11:00 12:00 109494.27 204122.00 11:38 22146.68 95139.40 11:2110/25/99 12:00 13:00 120689.33 219084.00 12:59 36755.46 77071.20 12:2710/25/99 13:00 14:00 104552.70 262792.00 13:00 39029.91 96999.50 13:2110/25/99 14:00 15:00 102345.99 187674.00 14:47 20576.39 56095.10 14:2110/25/99 15:00 16:00 93852.23 278003.00 15:19 22362.19 69550.20 15:5410/25/99 16:00 17:00 115890.41 485605.00 16:36 23883.81 57638.10 16:5010/25/99 17:00 18:00 61375.79 143225.00 17:39 16664.71 41997.50 17:31
Absolute Total: 2943.66 746.56 MBytes MBytes
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4.4 Monitoring MUTiny.
Figure 4.14 The Host System Attributes Area
nemNEMPoll self checks: - NEM Processes. - Host system metrics.
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MUTiny Self Monitoring.
NEM Self Monitor Configuration Window
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3. WWW Cache Status Monitoring.3.1 Caching Service Configuration.
requests
responses
30 machines Manchester
3 machines L’borough
6 machines London
Global Internet
150+ Sites
Figure 3.1 The Operation of the UK National
JANET Caching Service
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3.2 Caching Service Operation.
Need to know for each node:
- Network accessibility.
- CPU loading.
- Memory utilisation.
- Disk utilisation.
- Squid application status.
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Network Accessibility.
Figure 3.2 Manchester Main Window
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System Metric Monitoring.
Figure 3.3 Manchester Cache Systems Window
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System Metric Monitoring.
Display indicates: - If the machine is pingable. - If SNMP is operational. - The CPU loading. - Memory utilisation. - Disk utilisation. - Critical process status ( squid ).
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System Metric Monitoring.Prerequisites.
The UCD-SNMP mechanism
The monitored host must be running the UCD-SNMP agent software.
Management Station Remote Host
UCD-MIBsnmpd.conf
UCD-SNMP requests snmpwalk, snmpget
UCD-SNMP Agent
Access control
Host information Load Memory Disk Processes
Extensiblesection
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System Metric Monitoring.
System Polling Configuration Window
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System Metric Monitoring.
Disk Statistics Window
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System Metric Monitoring.
A Pop_Up Alarm Optional Audible_Alarm (bell).
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System Metric Monitoring.
Figure 5.5b Domain Status Section
Indicates most critical entry in each column.
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Real Time Metrics.
‘top’ Metric Window
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4 Future Developments.
- Distributed Network Management.
- MUTiny NEM GUI.
- Web Based Topology Display.
- An Applications Interface.