Network Management

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Chapter 4

Chapter 4 SNMPv1: Organization and Information Models

Network Management: Principles and Practice © Mani Subramanian 2000

1

Chapter 4

Case Histories
• AT&T Network Management Centers • Network Operations Center • Network Control Centers • Monitors the network status • Self-healing • CNN World Headquarters • Performance Management • Fault Management • Monitoring alarms • Determines causes of failures (Artificial Intelligence) • Centralized troubleshooting of NIC (remotely) • Performance degradation due to NMS • Network may come down due to NM traffic • Need to manage NM tools • Bell Operating company procedure • NM tools can help in standardization of NM process Network Management: Principles and Practice © Mani Subramanian 2000

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Chapter 4

Managed LAN
NMS 192.168.252.110 192.168.252.0

Router 2 Backbone Network

Router 1 172.16.46.0
Hub 1 172.16.46.2 Hub 2 172.16.46.3

Figure 4.1 A Managed LAN Network

Notes
• NMS can automatically discover any component in the network as long as this component has a management agent. • NMS on subnet 192.168.252.1 manages the router and the hubs on subnet 172.16.46.0 across the backbone network 3

Network Management: Principles and Practice © Mani Subramanian 2000

Chapter 4

Managed Hub: System Information
Title: System Information: 172.16.46.2 Name or IP Address: 172.16.46.2 System Name System Description System Contact System Location System Object ID System Up Time : : 3Com LinkBuilder FMS, SW version:3.02 : : : .iso.org.dod.internet.private.enterprises.43.1.8.5 : (2475380437) 286 days, 12:03:24.37

Figure 4.2(a) System Information on 172.16.46.2 Hub

Notes
• Information obtained querying the hub • Data truly reflects what is stored in the hub • System Description and System Object ID are set at the factory and can’t be modified → read-only. • Time unit :1/100th of a second Network Management: Principles and Practice © Mani Subramanian 2000

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Chapter 4

Managed Router: System Information
Title: System Information: router1.gatech.edu Name or IP Address: 172.16.252.1 System Name System Description : router1.gatech.edu : Cisco Internetwork Operating System Software : IOS (tm) 7000 Software (C7000-JS-M), Version : 11.2(6),RELEASE SOFTWARE (ge1) : Copyright (c) 1986-1997 by Cisco Systems, Inc. : Compiled Tue 06-May-97 19:11 by kuong : : iso.org.dod.internet.private.enterprises.cisco.ciscoProducts. cisco 7000 : (315131795) 36 days, 11:21:57.95

System Contact System Location System Object ID System Up Time

Figure 4.2(c) System Information on Router

Notes

Network Management: Principles and Practice © Mani Subramanian 2000

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Chapter 4

Managed Hub: Port Addresses
Index Interface IP address Network Mask Network Address 172.16 46.0 192.168.101.0 Link Address

1 2

3Com 3Com

172.16.46.2 192.168.101.1

255.255.255.0 255.255.255.0

0x08004E07C25C

Notes
• Information acquired by the NMS on hub interfaces • Index refers to the interface on the hub • Link address is the MAC address • The second row data is a serial link

Network Management: Principles and Practice © Mani Subramanian 2000

6

Chapter 4

Managed Router: Port Addresses
Index Interface IP address Network Mask Network Address 192.168.3.0 192.168.252.0 172.16..46.0 172.16.49.0 172.16.52.0 172.16.55.0 172.16.56.0 172.16.57.0 172.16.58.0 172.16.60.0 Link Address

23 25 13 16 17 9 2 15 8 14

LEC.1.0 LEC.3.9 Ethernet2/0 Ethernet2/3 Ethernet2/4 Ethernet1/2 Ethernet 0/1 Ethernet2/2 Ethernet1/1 Ethernet2/1

192.168.3.1 192.168.252.15 172.16..46.1 172.16.49.1 172.16.52.1 172.16.55.1 172.16.56.1 172.16.57.1 172.16.58.1 172.16.60.1

255.255.255.0 255.255.255.0 255.255.255.0 255.255.255.0 255.255.255.0 255.255.255.0 255.255.255.0 255.255.255.0 255.255.255.0 255.255.255.0

0x00000C3920B4 0x00000C3920B4 0x00000C3920AC 0x00000C3920AF 0x00000C3920B0 0x00000C3920A6 0x00000C39209D 0x00000C3920AE 0x00000C3920A5 0x00000C3920AD...
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