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IBM 6 MPLS - page 1
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-1 6 MPLS Model User G uide Multi-Prot ocol Label Switching (MPLS) is a multi-layer swi tching technol ogy that uses label s to det ermine how pack ets are for warded through a network. The first part of this doc ument describes k ey features of the MPLS specia li ...
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IBM 6 MPLS - page 2
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-2 Model er/Relea se 10.0 • MPLS models are implemented based on inf ormation av ailable fr om the following sour ces. Table 6-2 Reference Documents Model Fe atures Document Traffi c Enginee ring MPLS TE RFC-2702 — R equirements for Traffic Engineering Over MPLS FECs RFC-3031 — M ...
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IBM 6 MPLS - page 3
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-3 Node Models The MPLS model suite supports workst ation, server, ro uter, and link model s from the s tandard model l ibrary. The LER (L abel Edge Router ) and LSR (Label Switching Router) node models in the MPLS ob ject palette are preconfigured to support MPLS ...
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IBM 6 MPLS - page 4
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-4 Model er/Relea se 10.0 Figure 6-2 Specifying FEC Attr ibutes The FEC Details Table helps define the FEC thro ugh a set of match rules, which are combinations of TCP, UDP, and IP header fields. FECs are determined by taking a logi cal AND of the column settings in a row and by taking ...
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IBM 6 MPLS - page 5
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-5 • LSP Specificati on Fil e This attri bute indicates whethe r the network LSPs should be config ured according to the text file specified. You can update the text fi le by clicking OK in the LSP Browser . Updating the f ile recreate s the file based on t he c ...
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IBM 6 MPLS - page 6
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-6 Model er/Relea se 10.0 Figure 6-5 Mapping EXP Bits to Dro p Pr ecedence and PHB Router Attributes Some of the importa nt MPLS Parameters attr ibutes set on rou ters are described below. Traffic Mapping Configuration This attribut e specifies bindi ngs between FECs and LSPs . Each ro ...
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IBM 6 MPLS - page 7
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-7 When an unlabeled packet arr i ves at an ingress LER, the followi ng sequenc e occurs to deter mine the correct la bel for the pack et: 1) The TE binding is selec ted based on the packet FEC and the incoming inte rface. 2) The packet is check ed to make sure th ...
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IBM 6 MPLS - page 8
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-8 Model er/Relea se 10.0 Figure 6-7 Configuring LDP Par ameters Simulation Attributes The followi ng simulation att ributes are available (Confi gure/Run Discre te Event Simulation dial og box) when using the MPLS model suite. • CR-LDP Routing —specifi es if CR-LDP ro uting uses C ...
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IBM 6 MPLS - page 9
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-9 LSP Attributes Some of the important LSP att ributes are descri bed below. Most of these attri butes can also be conf igured i n the LSP browser, which is descr ibed in the next sectio n. Figure 6-8 Configuring an LSP’s Attr ib utes • Directional ity —spe ...
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IBM 6 MPLS - page 10
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-10 Mo deler/Relea se 10. 0 Figure 6-10 Recovery Parameters Configuration • Setup Parameter s —specifies the dur ati on of the LSP. Figure 6-11 Setup Par ameters Configuration • TE Parameters —s pecifies the traf fi c engineering cons traints used by CR-LDP to find a route thro ...
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IBM 6 MPLS - page 11
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-11 LSP Browser After y ou create the LSPs in the network, you may want to edit or view t he default settings. You do this in the LSP browser, which you can ac cess from the Protocols > MPLS > Browse/Edit LSP I nformation. .. menu i tem. The brows er enables ...
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IBM 6 MPLS - page 12
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-12 Mo deler/Relea se 10. 0 Available Stat istics To analyze MPLS performance, you can c ollect pa th stati stics on end- to-end delay, u tilizati on, and the amount of tr affic on the LSP. Thes e statis tics can be collect ed on a per-flow or per LSP basis, where flows are indi vi dua ...
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IBM 6 MPLS - page 13
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-13 Configuring MPLS in a Network Configuri ng MPLS in a network is a three-st ep process. Before you can run a simulation using MPLS, you must 1) Create LSPs in the network topol ogy 2) Create FECs and traff ic trunks i n the MPLS Conf iguration obj ect 3) Config ...
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IBM 6 MPLS - page 14
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-14 Mo deler/Relea se 10. 0 2 If you hav e not assig ned IP add resses to all conn ected int erfaces in the networ k, click the “Perform Auto-Assig nment” bu tton. Otherwi se, click th e “Skip Auto-Ass ignment” button. ➥ The MPL S Configura tion dial og box ope ns. This b ox ...
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IBM 6 MPLS - page 15
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-15 Constraine d OSPF (CSPF) is us ed to impl ement constra int-based routing of LSPs. You can configure dynamic LSPs t o use const raint-based r outing i n the LSP’s TE Paramet ers attribute by sett ing the Bandwidth, Delay, and Hop Count constrai nts. When usi ...
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IBM 6 MPLS - page 16
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-16 Mo deler/Relea se 10. 0 Creating FECs a nd Traffic Trunks The traffic engi neering bindin gs that govern how packets are labele d and forwarded in a network use FECs and traffic tr unks to classif y packets. All of the FECs and traffi c tru nks in a network are defined in the MPLS ...
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IBM 6 MPLS - page 17
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-17 Creating TE Bindings on LERs After you create the LSPs, FECs, and traffic tr unks, you can create TE bindings that govern whic h packets are sent to which LSPs. You do this in the LER’s MPLS Paramete rs ➘ Traffic Mapping Confi guration at tribute. Procedur ...
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IBM 6 MPLS - page 18
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-18 Mo deler/Relea se 10. 0 Exporting LSP Configuration Details for Use in Other Scenarios You can reu se LSPs that you have confi gured elsewher e by ex port ing t he LSP configur ation details to an ASCII fi l e and using this file to cre ate LSPs in the network. Procedure 6-7 Export ...
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IBM 6 MPLS - page 19
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-19 Applying QoS to an MPLS Network Model Differe ntial Services (Di ff Serv) extensions can be used to appl y quality-of -service constraints to yo ur MPLS networ k model. To do t his, you must configur e QoS do the following: • Specify tr affic class es in the ...
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IBM 6 MPLS - page 20
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-20 Mo deler/Relea se 10. 0 If you cha nge the queuing s cheme later, make su re you reset the queuing pr ofile because the order of t hese steps is importa nt. Figure 6 -15 Configuring QoS on an LER Always se t the Que uing Scheme b efore setting the Queu ing Profile . ...
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IBM 6 MPLS - page 21
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide Modeler/ Release 10.0 SPM-6-21 MPLS Menu Operations The Protocols > MPLS menu enables you to configure, edi t, and display MPLS features i n the networ k topology. With the MPLS menu operations , you to streamli ne the MPL S confi guration process. Tabl e 6-3 lists the oper ati ons avail ...
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IBM 6 MPLS - page 22
Special ized Model s User Gui de 6 MPLS Mo del Use r Guide SPM-6-22 Mo deler/Relea se 10. 0 Information for OPNET Modeler Users The rest of this document contain s information fo r mo del devel opers (such as OPNET Modeler use rs). The following sec tions descr ibe the topi cs necessar y for underst anding the intern al det ails of and interfac ing ...
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