Manuale d’uso / di manutenzione del prodotto OL-12518-01 del fabbricante Cisco Systems
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CH A P T E R 4-1 Data Center High Availability Clusters Design Guide OL-12518-01 4 FCIP over IP/MPLS Core This chapter discu sses the transport of Fibre Chan nel ov er IP (FCIP) o ver IP/ Multiprotocol Label Switching (MPLS) netw orks and addresses the netw ork requirements from a service pro vider (SP) perspectiv e.
4-2 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Typical Customer Require ments Typical Customer Requirements Small-to-medium businesses (SMBs) represent about 90 percent of all compan ies in the United States.
4-3 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Typical Customer Requirements The requirements are as follows: • FCIP transport o v er an optimiz.
4-4 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Typical Customer Require ments Hardware-based compression is a v ailable with SAN-OS version 2. 0 and with ne w hardwa re (MDS 9216i/MLS14/2). Compr ession is applied per FCIP inte rf ace (tunnel) with a v ariety of m odes a v ailable.
4-5 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Typical Customer Requirements Figur e 4-2 Cisco Comp ression Solutions The follo wing performan ce data applies to Figure 4-2 : • V AM—9.9–12 MB/sec –10.
4-6 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Typical Customer Require ments • SPs provid ing VPN service to transport FCIP tr af fi c to pro.
4-7 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Using FCIP Tape Acc eleration Write Acceleration Write Acceleration is a configurable feature intr oduced in SAN-OS 1.3 that enhances FCIP SAN extension with the IP Storage Se rvices Module.
4-8 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Using FCIP Tape Ac celeration FCIP T ape Acceleration maintains data inte grity in the e v ent of a v ariety of error con ditions. Link errors and resets are handled through Fibre Channel-tape Ethernet LAN serv ices (ELS) reco v ery mechanisms.
4-9 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Using FCIP Tape Acc eleration • TCP windo w size • TCP maximum bandwidth • TCP minimum a v ailable bandwidth • Round T rip T ime (R TT) TCP Window Size TCP uses a sliding windo w to control the fl ow of data from end to end.
4-10 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Using FCIP Tape Ac celeration The min-availabl e-bw parameter provides the n ecessary control. Ev en in the presence of drops, the sender tries aggressi v ely to reach the v alue confi gured for this parameter .
4-11 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Using FCIP Tape Acc eleration • Simplif ied managemen t—Provides a un ifi ed mana gement en vironment ind ependent of whether servers use FCIP to connect to the storage network.
4-12 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Using FCIP Tape Ac celeration Multiprotocol Services Module The Cisco MDS 9000 Famil y 14/2-port.
4-13 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core QoS Requirements in FCIP QoS Requirements in FCIP Currently , most of the FCIP links are dedi cated for pur e Fibre Channel traff ic.
4-14 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Applications Figur e 4-4 Using the GUI t o App ly QoS Applications Disaster recovery and b usine.
4-15 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Service Offerings over FCIP Service Offerings over FCIP Figure 4-5 sho ws a typical service architecture for deplo ying FCIP ov er IP/MPLS.
4-16 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Service Offerings over FCIP Figur e 4-6 FCIP ov er SP IP/MPLS Cor e f or Disast er Re cov ery So.
4-17 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Service Offerings over FCIP Figure 4-7 FCIP Connectivity bet ween Second Sit e and Third Site Service Offering Scenario C—Host-based Mirroring IP/MPLS networks can b e used to implement host-based mi rroring based on iSCSI.
4-18 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core MPLS VPN Core MPLS VPN Core MPLS provides an ef f icient mechanism for suppo rting VPNs, which of fer performance guarantees and security .
4-19 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core MPLS VPN Core Figur e 4-9 MPLS VPN for Storage Architec ture Multiple storage customers can be supp orted on th e same MPLS network.
4-20 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Testing Scenarios and Results When a PE router forwards a packet recei v ed from a CE router across th e provi der network, it labels the packet with the label learned from the destinat ion PE router .
4-21 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Testing Scenario s and Results Figure 4-1 0 T est Lab Setup and T opology VPN VRF—Specific Configurations MP BGP Configuration—PE1 The follo wing is a sample co nf iguration for PE1 in Figure 4-10 .
4-22 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Testing Scenarios and Results Gigabit Ethernet Interf ace Configuration—PE1 The follo wing sample co nf iguration is for the Gig abit Ethernet interf ace for PE1 in Figure 4 -10 .
4-23 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Testing Scenario s and Results VRF Configuration— PE2 The follo wing are the VRF def inition s o.
4-24 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Testing Scenarios and Results Figure 4-1 1 Cisco MDS 9216 i Conn ection to GSR MPLS Cor e Configuring TCP Parameters on CPE (Cisco MDS 9216) A simple ping command from the Cisco MDS 9000 CLI, provides the R T T between the two IP addresses.
4-25 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Testing Scenario s and Results Where sustained Gigabit throu ghput is not required (for example, o v er an OC-12 or slo wer W AN link), an MTU of 1500 b ytes is adequate .
4-26 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Testing Scenarios and Results Figure 4-14 sho ws the a v erage latency with packet size of 1024.
4-27 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Testing Scenario s and Results The test results re veal th at the maximum traf f ic that can be transported across the Cisco 7500 as PE is around 35 percent, as sh ow n in Figure 4-16 .
4-28 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Testing Scenarios and Results Scenario 6—Impact of Compression on CPE (Cisco 9216i) Performance Y ou can compress the data stre am to reduce W AN li nk utilization.
4-29 Data Center High Availability Clusters Design Guide OL-12518-01 Chapter 4 FCIP over IP/MPLS Core Application Requirements Figure 4-1 8 Com pr ession Ratio Comparisons Application Requirements Before designing a W AN, it is important to understa nd the requirements o f each appl ication and ho w it performs on the network.
4-30 Data Center High Availab ility Clusters Design Guide OL-12518-01 Chapter 4 FCIP o ver IP/MPLS Core Conclusion In addition to th ose listed in Ta b l e 4 - 2 , other requirements includ e pro visioning, error mo nitoring, and end-to-end management.
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 Cisco Systems OL-12518-01 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 Cisco Systems OL-12518-01 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Cisco Systems OL-12518-01 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Cisco Systems OL-12518-01 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Cisco Systems OL-12518-01, 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 Cisco Systems OL-12518-01.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Cisco Systems OL-12518-01. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Cisco Systems OL-12518-01 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.
