Manuale d’uso / di manutenzione del prodotto 6 MPLS del fabbricante IBM
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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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 .
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.
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).
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il IBM 6 MPLS è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del IBM 6 MPLS - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso IBM 6 MPLS imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul IBM 6 MPLS ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il IBM 6 MPLS, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del IBM 6 MPLS.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il IBM 6 MPLS. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo IBM 6 MPLS insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
