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Bedienungsanleitung Cisco Systems OL-12518-01

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  • Cisco Systems OL-12518-01 - page 1

    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. This chapter also describes ser ...

  • Cisco Systems OL-12518-01 - page 2

    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. These companies typically employ a few hundred emplo yees and are highly focused on t ...

  • Cisco Systems OL-12518-01 - page 3

    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 optimized I P/MPLS networ k • Some type of compression mechanism (softw are or hardware) • Security mechanism (IPSec, encr yption, and VPN networks) • ...

  • Cisco Systems OL-12518-01 - page 4

    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. Beginni ng ...

  • Cisco Systems OL-12518-01 - page 5

    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 –10.9 MB/sec a verage • V AM2—19.7–25.4 MB/sec – 1 9 MB/sec a verage • IPS—18.6? ...

  • Cisco Systems OL-12518-01 - page 6

    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 vide additional security • Using an MPLS extranet for application-specific security Cisco Encryp tion Solutions For sele cting compression solution ...

  • Cisco Systems OL-12518-01 - page 7

    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. Write Acceleration is a SCSI protocol spoof ing mechanism ...

  • Cisco Systems OL-12518-01 - page 8

    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. Sh ...

  • Cisco Systems OL-12518-01 - page 9

    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. The TCP maximum ...

  • Cisco Systems OL-12518-01 - page 10

    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 . Even if t he congestion windo w is ...

  • Cisco Systems OL-12518-01 - page 11

    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. • Comprehensi v e security—Combines the ubiq uitous IP securit ...

  • Cisco Systems OL-12518-01 - page 12

    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 Multipr otocol Services Module deli v ers the intelligence and adv anced features required to make multilayer SANs a real ity , by inte grating in a ...

  • Cisco Systems OL-12518-01 - page 13

    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. But in most cases if QoS is enabled, most of the SAN applications can be transported across the sa me traff ic eng ...

  • Cisco Systems OL-12518-01 - page 14

    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 usiness continuance plans dr i ve the need for soluti ons that prote ct critical business information and pro vide c ontinuous access to important data in ...

  • Cisco Systems OL-12518-01 - page 15

    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. Figur e 4-5 FCIP ov er IP/MPLS Arc hit ect ure The FCIP gate way is the ke y compon ent of the ov erall arch ...

  • Cisco Systems OL-12518-01 - page 16

    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 Solution s Service Offering Scenario B—Connecting Multiple Sites In certain cases, customers prefer to hav e primary and secondary sites connect ed by ...

  • Cisco Systems OL-12518-01 - page 17

    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. A typ ical network set ...

  • Cisco Systems OL-12518-01 - page 18

    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 . Using a VPN, c ustomer traf f ic passes transpar ently through the Internet in a w ay that effecti vely se ...

  • Cisco Systems OL-12518-01 - page 19

    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. Customer 1 cannot see the customer 2 network because there are separate VPN routing/forwarding (VRF) tables for eac ...

  • Cisco Systems OL-12518-01 - page 20

    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 . When the destination PE router receiv es the ...

  • Cisco Systems OL-12518-01 - page 21

    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 . The MP-BGP between the two PEs carries the CE ...

  • Cisco Systems OL-12518-01 - page 22

    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 . interface GigabitEthernet0/0/0 ip vrf forwarding storage ip addr ...

  • Cisco Systems OL-12518-01 - page 23

    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 on the PE2(7500-106) rout er: ip vrf storage rd 105:106 route-target export 105:106 route-target import 105:106 This test assumes the Cisco MDS 9216/92 ...

  • Cisco Systems OL-12518-01 - page 24

    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. R TT ...

  • Cisco Systems OL-12518-01 - page 25

    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 . Otherwise, use jumbo frames if p ossible and set the MTU on the Gigabit Ethe ...

  • Cisco Systems OL-12518-01 - page 26

    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. Figure 4-14 A verag e Lat ency—P ac k et siz e 1 024 Scenario 3—Cisco MDS 9216i Connection to Cisco 7500 (PE)/GSR (P) In this scenario, the Cisco ...

  • Cisco Systems OL-12518-01 - page 27

    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 . Figure 4-16 T raf fic Load v ersus Utilization T est Results S ...

  • Cisco Systems OL-12518-01 - page 28

    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. Some W A N deployments may requ ire compression to ob tain adequate throughpu t ...

  • Cisco Systems OL-12518-01 - page 29

    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. Ther e are numerous a ...

  • Cisco Systems OL-12518-01 - page 30

    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. Remote Tape-Backup Applications In an enterprise network, certain sites (remote br anches or smal ...

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