1. Network and Services Management
Jean Walrand EECS

2. Outline Objectives SNMP RMON NETFLOW MPLS & GMPLS DiffServ End-to-End
Overlay
Tools For Smart Networks

3. Objectives Box Management Network Management Services Management
Fault Management
Performance Management
Network Management
Network Planning
Traffic Engineering
Services Management
Resource Allocation/Pricing

4. SNMP
Simple Network Management Protocol

5. SNMP
Protocol: GetRequest/GetNextRequest/GetResponse/SetRequest/Traps (protected)
Management Information Base (MIB): OID
Standardized
Custom
Examples:
Number of interfaces
Number of bytes & packets /port
PER
Tutorial

6. NetFlow (Cisco) Link Flow: (SIP, STCP, DIP, DTCP, ToS) Functions:
Provide detailed data collection with minimal impact on router performance and
Efficiently process access lists for packet filtering and security services
Applications:
Accounting/Billing
Network Planning and Analysis---
Network Monitoring
Application Monitoring and Profiling
User Monitoring and Profiling
NetFlow Data Warehousing and Mining

7. NetFlow (Cisco) (cd)
Architecture:

8. RMON Remote Monitoring RFC 1757 Statistics: about subnet or network
History: Sample statistics at separate intervals
Alarms: When and how alarms are to be used
Hosts: Statistics about activity host <-> subnet
Hosts Top N: Statistics about the N highest hosts
Traffic Matrix: Traffic and error information
Filters: Specify packets or packet types to capture.
Packet Capture: How to get data from and about network history.
Events: List of all the events, or activities, created by the monitor.

9. Multi-Protocol Label Swtching Part 2
MPLS & GMPLS
Key Ideas:
Set up paths – Label Switching
Advantages:
Faster switching (initial idea)
Control routing; Traffic Engineering; QoS
Multi-Protocol Label Swtching
Part 2

10. DiffServ Key Ideas: CoS – Per Hop Behavior (e.g., VoIP)
Hose Model (as opposed to pipe model)
Worst-Case + Overbooking

11. DiffServ Goal: Solution: CoS without per-connection state
No route-pinning
Planning and operations based on aggregate statistics and worst-case routing
Peer-to-peer SLAs that specify total rate but not traffic destination

12. DiffServ – Worst Case CAC
Ingress 3
Ingress 3
Ingress 1
Ingress 1
Bottleneck Link
Ingress 2
Ingress 2
Typical Case
Worst Case
Terribly wasteful!

13. DiffServ – Measurement Based CAC
New
Capacity
Mean + 2.4s
Gap
Admit if peak(new) < Gap at all times

14. End-to-End Key Ideas: Advantages: Main Issues:
Measure QoS with a few test packets
Abort if QoS is not acceptable
If all users do this, should be OK
Advantages:
Connections are protected
No need for CAC infrastructure
Main Issues:
Can one measure reliably end-to-end?
Assumes all users are honest
Fairness

15. Overlay Networks

16. Overlay Networks (cd)
Tunnel
with CoS
Control
CAC
Transport

17. Tools for Smart Networks
Admission
Controller
Network
Measurement
Router
Configuration
Public Internet
Access
Gateway
Switch
(control)
Performance Monitoring
Traffic Generation
Sinks
Source
Switch
(source)
Switch
(sink)

18. Tools for Smart Networks…
Measurement-Based
Worst Case
EF from S1 to D3
1000s
Measurement-Based Admission Control and Provisioning for DiffServ

19. Tools for Smart Networks …
SNT