MPLS Network Simulator (694430028)(MNS)

OUTLINEBackground (MPLS)

Introduction (MNS)

Architecture (MPLSnode)

API (for LDP and CR-LDP)

API (for Creating MPLS network)

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BackgroundMPLS -- (Multi-Protocol Label Switching)

Why MPLS ?IP network

MPLS network IP label

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Background *

BackgroundMPLS networkLSR(Label Switch Router) *

BackgroundLSR(Label Switch Router)Ingress LSR IP PacketMPLS (Push Label )Core LSR MPLS (Label Swap)Egress LSR MPLS ( Pop Label) *

BackgroundLabel Assignment and Distribution(1/5) LSR Routing Table routing protocol FIB(Forwarding Information Base) *

BackgroundLabel Assignment and Distribution(2/5)LSR Allocating Label LSRMPLSpathRouting entryAssign Label

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BackgroundLabel Assignment and Distribution(3/5)LIBLFIB Allocating local LabelLIB(Label Information Base)LFIB(Label Forwarding Information Base) *

BackgroundLabel Assignment and Distribution(4/5)LSR Label Distribution LSRLDP(Label Distribution Protocol) Local assignLabel(Distribution)LSR *

BackgroundLabel Assignment and Distribution(5/5) Lablerouting tableNext-hop LSR LabelLFIBoutgoing Label *

BackgroundPacket (1/2)Ingress LSRIP PacketDestination IP addressFIBlookupIP networkFIBLabelPacketLabel=#

Core LSR Lookup LFIBLabel=#entryentryOutgoing LabelLabel(Label=@) *

BackgroundPacket (2/2)Egress LSRLookup LFIBLabel=@entryentryOutgoing LabelOutgoing Label=PopPacketLabelMPLSIP

Penultimate Hop Popping Egress LSRLabelEgress LSRIP lookup *

BackgroundLSP (Label Switching Path) Switching LSP (Label Switching Path) *

BackgroundLDP(Label Distribution Protocol)LSR Label/Stream (mapping)CR-LDP LDP MPLS Traffic Engineering LDP CR-LDP (Explicit Route )ER-LSPMPLSLSPER-LSP*

BackgroundLabel StackLabelMPLS Label*

MNSmodulens-allinone-2.29/ns-2.29/mplsexample tclns-2.29/tcl/test/test-suite-mpls.tclrun example(simple)ns test-suite-mpls.tcl simplenamnam simple.nam*

MNSexperiment environment *

MNSSchedulingat 0.01 Label Distributionat 0.20 Label withdrawal for FEC 9 & 10at 0.30 Flow Aggregation at 0.70 CD-LDP Reuqest/Mapping Message for creating an ER-LSPat 0.90 Packet Switching based on the ER-LSPat 1.60 Packet Switching based on the LSP Tunnel*

MNSER-LSP : 2 5 4 8 6 7 *

MNS ER-LSP : 2 3 4 5 6 8 7 *

MNSMPLS Packet Trace < shim headers size>

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MNSimplementation scope(1/2)Label Switchinglabel swapping/stacking operation,TTL decrement, and penultimate hop popping

LDP Protocolhandling LDP messages(Request,Mapping, Withdraw, Release, and Notification)*

MNSimplementation scope(2/2)CR-LDP Protocolhandling CR-LDP messages

Flow Aggregationaggregate fine flows into a coarse flow*

ArchitectureNode in NSAgentClassifier

MPLSnode in MNSInserte -- MPLS Classifier and LDP agent*

Architecture*

ArchitectureMPLSnode operationMPLS Classifierdetermines whether the packet is labeled or unlabeledlabeled swapping and sends it to the next nodeunlabeled with LSP prepared as labeled packetOtherwise sends it to Addr Classifier*

ArchitectureMPLSnode operationAddr Classifierexecutes L3 forwardingnext hop is itself sent toPort Classifier*

Architecturethree tables in MPLSnodeManage information related to LSPPFTConsists of FECPHBLIBptrLIB Information for LSPERBInformation for ER-LSP*

Architecture*

Architectureunlabeled packet

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Architecture*unlabeled packet

Architecturelabeled packet*

Architecture*labeled packet

API (for LDP and CR-LDP)*

API (for Creating MPLS network)*

API (for Creating MPLS network)*