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CHAPTER 8 Network Management

CHAPTER 8 Network Management. Wilmot N. Adekoya. Chapter 8 Network management. OBJECTIVE Chapter 8 covers: Describe how the MIB elements relate to MPLS in general Explain how to combine these MIB elements in an operational MPLS network. Chapter 8 The (Internet Draft) Standard MPLS MIBs.

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CHAPTER 8 Network Management

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  1. CHAPTER 8Network Management Wilmot N. Adekoya

  2. Chapter 8 Network management OBJECTIVE Chapter 8 covers: Describe how the MIB elements relate to MPLS in general Explain how to combine these MIB elements in an operational MPLS network

  3. Chapter 8 The (Internet Draft)Standard MPLS MIBs Closer look at IETF MPLS MIBs • Two MIBs described in the International Engineering Task Force (IFTF) • 1. Multiprotocol Label Switching (MPLS) Label Switch Router (LSR) MIB • 2. Multiprotocol Label Switching (MPLS) Traffic Engineering MIB • Both provide framework for managing MPLS NEs.

  4. Chapter 8 The (Internet Draft)Standard MPLS MIBs MIBs achieve the following • -manage the low-lever MPLS objects, such as cross-connects and segment table. • -create LSPs • -manage the high-lever MPLS object, such as traffic-engineered tunnels EROs and resource blocks • LSR MIB objects table describe • A) In – segment b) Out – segment c) Label stacks, • d) Traffic parameters e) Performance parameters

  5. TE MIBs describes Traffic-engineered tunnels Tunnel resources Tunnel paths Tunnel performances MPLS Devices -IP routers -ATM switches operating in SIN mode -Multiservice switches Ethernet X.25 TDM IP MPLS Chapter 8 The (Internet Draft)Standard MPLS MIBs

  6. Chapter 8 The (Internet Draft)Standard MPLS MIBs MPLS Interfaces include the following configurations • IP routering interface • IGP routering with TE extensions • OSPF, IS-IS-TE • EGP protocol • A signaling protocol such as LDP or RSVP-TE

  7. Chapter 8 The (Internet Draft)Standard MPLS MIBs • MPLS NETWORK EXAMPLE • See page 258 • The labeling decision may base on: • Content of IP header DS field • Destination of source IP address • Destination of source port

  8. Chapter 8 The (Internet Draft)Standard MPLS MIBs • The MPLS Interface MIB Table p. 260 • Relationship between interface table and the interfaces. The MPLS In-segment MIB table p.261 • Controls the forwarding of packets into the LSP The Out-Segment MIB Table p.262 Egress leg of the LSP segment on a given MPLS NE

  9. Chapter 8 The (Internet Draft)Standard MPLS MIBs • Cross-Connects MIB Table p. 263 • Create associations between LSP segments to support point-to-point, point-to-multipoint, and point-to-point connection Label Stacks p. 265 • useful for hierarchical routering • Labels beneath the topmost become accessible when the topmost one is popped.

  10. Chapter 8 The (Internet Draft)Standard MPLS MIBs • Traffic Parameter • Entries are created by the use of mplsTrafficParameterIndexN-ext object • Maximum rate are measure in unit of kilobits per second • Kilobits per second is the required rate of packet forwarding Performance page 266 provides entry for every interface on LSR capable of supporting MPLS

  11. Chapter 8 Configuring LSP through an LSR • Enabling MPLS on MPLS-cable interfaces • Configuring in-segments on LSRs and egress LERs • Configuring out-segments on LSRs and ingress LERs. • Setting up the cross-connect table of associate segment • Configuring a tunnel object to point to the cross-connection origination and termination

  12. Chapter 8 Configuring LSP through an LSR • Optional specifying label stack actions • Optional specifying. • CRIATION AN LSP USING THE LSR MIB • Carry the non-real time SMTP traffic through the MPLS cloud • Create best effort , unidirectional LSP segment that originates in a tunnel on the MPLS Edge Routers

  13. Chapter 8 Edge Router 1cross connect and out segment Table • Three objects are required on an ingress LER • A CROSS-CONNECT • AN OUT-SEGMENT • A TUNNEL ROUTER CONFIGURATIONS SEE PAGES PAGE 268 PAGE 270 PAGE 271

  14. Traffic-Engineering Tunnel • Provides tunnel through MPLS clouds • Provides an end-to-end picture • Tunnels can be created at the head-end (originating) node • The MIB for all nodes in the path are automatically updated via a signaling protocol such as (RSVP)

  15. Traffic-Engineering Tunnel • TE support five tables for creating tunnels: • Tunnel table record tunnel parameters • Resource table configured end-to-end tunnel resources such as bandwidth • Tunnel hop tables • For specified, actual, and computer route

  16. The mpls Tunnel Table page 275-279 • Tunnel Table Line 1-2 • Unique index identified • Tunnel configurations to protect load sharing • Tunnel has its own path and reserved resources • Information of tunnel can be stored

  17. The mpls Tunnel Table page 275-279 • Tunnel table lines 7 and 8 • Corresponds to an interface by a value of the Boolean Tunnel table lines 9 and 10 • Signaled tunnels store the value of the signaling protocol. Tunnel table lines 11 and 15 • Setup priority of the tunnel • Characteristic of the tunnel instance are specified • Instance are restored automatically following a failure

  18. The mpls Tunnel Table pp. 275-279 • Tunnel table Line 16 • Indicate the entry • Indicates best –effort treatment Tunnel Table 17 • Differentiate between groups of tunnel instances Tunnel table 18-20 • Indicate administrative defined

  19. The mpls Tunnel Table pp. 275-279 • Tunnel table lines 21-25 • Billing and accountant proposes Tunnel table line 26 • Overall number of tunnel state transitions • Admin and operational status changing from up to down Tunnel Table lines 27-29 • Provide finer control over which link a tunnel traverses • Assigned constraint values • Constraint is zero or the link fulfills at least one constraint

  20. The mpls Tunnel Table page 275-279 • Tunnel table line 30 • Indicate the path chosen for the tunnel Tunnel Table lines 31-33 • Indicate the up time of the tunnel instance Tunnel Table lines 34-35 • Administratively assigned operational status of the tunnel • Indicates the value of up, down, testing, unknown

  21. The mpls Tunnel Table pp. 275-279 • Tunnel table lines 36-37 • Use to manage SNMP row operation against an entry • Has semantics as other tables The mpls tunnel resource table see p.278 • indicates the resources • Bandwidth, burst, size for a given tunnel • Availability of the tunnel resources • Maximum byte size

  22. The mplsTUNNEL TABLE • Pre-assigned route of path Explicit route Object (ERO) • Serve to indicate a set of hops • Called path option • Contain IPv4 address and prefix length • Contain value of IPv6 address prefix length

  23. Creating a Tunnel using the TE MIB • Traffic engineered tunnel specify both the resources and the nodes required in the path • Configuring the Tunnel • See page 281 • Included single object • Last object to be set is the row status • Indication of remote agent that the operation is a row • Indicate that the row is active and ready for service

  24. SUMMARY • This chapter describes how the two IETF MPLS MIBs object can be manipulated by an NMS in order to create LSPs and Tunnels • Covers tables to configured path such as • In-segment, out-segment, cross connect and additional tunnel tables • Tunnel tables covers hop table and resource table

  25. SUMMARY • NMS table are presented in this chapter in a detail case study with manipulations. • NMS would provide a simple interface the offers a limited set of choices, for example, either LSP of a tunnel as the required connection type. • Simplifying operation is one of the many merits of effective NMS products. • Importantly, the many table needed for MPLS provisioning underlines the importance of good table insertion discipline.

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