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SAN_Module3_Part1_PPTs.pptx
1.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. MODULE – 6 IP SAN AND FCOE Module 6: IP SAN and FCoE 1
2.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Upon completion of this module, you should be able to: • Describe IP SAN protocols, components, and topology • Describe FCoE protocol, components, and topology Module 6: IP SAN and FCoE 2 Module 6: IP SAN and FCoE
3.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Module 6: IP SAN and FCoE During this lesson the following topics are covered: • Drivers for IP SAN • IP SAN Protocols: iSCSI and FCIP • Components, topologies, and protocol stack for iSCSI and FCIP Lesson 1: IP SAN Module 6: IP SAN and FCoE 3
4.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Drivers for IP SAN • IP SAN transports block-level data over IP network • IP is being positioned as a storage networking option because: Existing network infrastructure can be leveraged Reduced cost compared to investing in new FC SAN hardware and software Many long-distance disaster recovery solutions already leverage IP- based network Many robust and mature security options are available for IP network Module 6: IP SAN and FCoE 4
5.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. IP SAN Protocol: iSCSI • IP based protocol that is used to connect host and storage • Encapsulates SCSI commands and data into an IP packet and transports them using TCP/IP Module 6: IP SAN and FCoE 5
6.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Components of iSCSI • iSCSI initiator Example: iSCSI HBA • iSCSI target Storage array with iSCSI port iSCSI gateway – enables communication with FC storage array • IP network Module 6: IP SAN and FCoE 6 iSCSI Port FC Port iSCSI Gateway Storage Array Server iSCSI HBA Storage Array IP
7.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. iSCSI Host Connectivity Options • Standard NIC with software iSCSI initiator NIC provides network interface Software initiator provides iSCSI functionality Requires host CPU cycles for iSCSI and TCP/IP processing • TCP Offload Engine (TOE) NIC with software iSCSI initiator Moves TCP processing load off the host CPU onto the NIC card Software initiator provides iSCSI functionality Requires host CPU cycles for iSCSI processing • iSCSI HBA Offloads both iSCSI and TCP/IP processing from host CPU Simplest option for boot from SAN Module 6: IP SAN and FCoE 7
8.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. iSCSI Topologies: Native iSCSI • iSCSI initiators are either directly attached to storage array or connected through IP network No FC component • Storage array has iSCSI port • Each iSCSI port is configured with an IP address Module 6: IP SAN and FCoE 8 Storage Array iSCSI Port Server iSCSI HBA IP
9.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. iSCSI Topologies: Bridged iSCSI • iSCSI gateway is used to enable communication between iSCSI host and FC storage • iSCSI gateway works as bridge between FC and IP network Converts IP packets to FC frames and vice versa • iSCSI initiator is configured with gateway’s IP address as its target • iSCSI gateway is configured as FC initiator to storage array Module 6: IP SAN and FCoE 9 FC HBA Server iSCSI HBA Storage Array FC Port iSCSI Gateway Server IP FC SAN
10.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Combining FC and Native iSCSI Connectivity • Array provides both FC and iSCSI ports Enable iSCSI and FC connectivity in the same environment No bridge devices needed Module 6: IP SAN and FCoE 10 FC HBA Server iSCSI HBA Storage Array FC Port iSCSI Port Server IP FC SAN
11.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. iSCSI Protocol Stack Module 6: IP SAN and FCoE 11 Ethernet IP TCP iSCSI SCSI Data OSI Model iSCSI Initiator iSCSI Target Layer 7 Application Layer 5 Session Layer 4 Transport Layer 3 Network Layer 2 Data Link SCSI iSCSI TCP IP Ethernet SCSI iSCSI TCP IP Ethernet Interconnect Commands and Data Login and Discovery Windows and Segments Packets Frames
12.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. iSCSI Discovery • For iSCSI communication, initiator must discover location and name of target on a network • iSCSI discovery takes place in two ways: SendTargets discovery Initiator is manually configured with the target’s network portal Initiator issues SendTargets command; target responds with required parameters Internet Storage Name Service (iSNS) Initiators and targets register themselves with iSNS server Initiator can query iSNS server for a list of available targets Module 6: IP SAN and FCoE 12
13.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. iSCSI Name • iSCSI name is a unique iSCSI identifier that is used to identify initiators and targets within an iSCSI network • Two common types of iSCSI names are: iqn: iSCSI Qualified Name iqn.2008-02.com.example:optional_string eui: Extended Unique Identifier eui.0300732A32598D26 Module 6: IP SAN and FCoE 13
14.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. IP SAN Protocol: FCIP • IP-based protocol that is used to connect distributed FC SAN islands • Creates virtual FC links over existing IP network that is used to transport FC data between different FC SANs • Encapsulates FC frames onto IP packet • Provides disaster recovery solution Module 6: IP SAN and FCoE 14
15.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. FCIP Topology Module 6: IP SAN and FCoE 15 FCIP Gateway FCIP Gateway Storage Array Storage Array Server Servers Server Servers IP FC SAN FC SAN
16.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. FCIP Protocol Stack Module 6: IP SAN and FCoE 16 IP Header TCP Header FCIP Header IP Payload SOF FC Header CRC EOF SCSI Data FCIP Encapsulation FC Frame IP Packet FC Frame FC to IP Encapsulation Physical Media IP TCP FCIP FCP (SCSI over FC) SCSI Commands, Data, and Status Application
17.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Module 6: IP SAN and FCoE During this lesson the following topics are covered: • Drivers for FCoE • Components of FCoE network • FCoE frame mapping • Converged Enhanced Ethernet (CEE) Lesson 2: Fibre Channel over Ethernet (FCoE) Module 6: IP SAN and FCoE 17
18.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Drivers for FCoE • FCoE is a protocol that transports FC data over Ethernet network (Converged Enhanced Ethernet) • FCoE is being positioned as a storage networking option because: Enables consolidation of FC SAN traffic and Ethernet traffic onto a common Ethernet infrastructure Reduces the number of adapters, switch ports, and cables Reduces cost and eases data center management Reduces power and cooling cost, and floor space Module 6: IP SAN and FCoE 18
19.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Data Center Infrastructure – Before Using FCoE Module 6: IP SAN and FCoE 19 Storage Array Storage Array Server FC Switches Server Servers Servers FC Switches IP Switches LAN
20.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Data Center Infrastructure – After Using FCoE Module 6: IP SAN and FCoE 20 Storage Array Storage Array Server FCoE Switches Server Servers Servers FC Switches LAN
21.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Components of an FCoE Network • Converged Network Adapter (CNA) • Cable • FCoE switch Module 6: IP SAN and FCoE 21
22.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Converged Network Adapter (CNA) • Provides functionality of both – a standard NIC and an FC HBA Eliminates the need to deploy separate adapters and cables for FC and Ethernet communications • Contains separate modules for 10 Gigabit Ethernet, FC, and FCoE ASICs FCoE ASIC encapsulates FC frames into Ethernet frames Module 6: IP SAN and FCoE 22
23.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Cable • Two options are available for FCoE cabling Copper based Twinax cable Standard fiber optical cable Module 6: IP SAN and FCoE 23 Twinax Cable Fiber Optical Cable Suitable for shorter distances (up to 10 meters) Can run over longer distances Requires less power and are less expensive than fiber optical cable Relatively more expensive than Twinax cables Uses Small Form Factor Pluggable Plus (SFP+) connector Uses Small Form Factor Pluggable Plus (SFP+) connector
24.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. FCoE Switch • Provides both Ethernet and FC switch functionalities • Consists of FCF, Ethernet bridge, and set of CEE ports and FC ports (optional) FCF encapsulates and de- encapsulates FC frames • Forwards frames based on Ethertype Module 6: IP SAN and FCoE 24 FC Port Fibre Channel Forwarder (FCF) FC Port FC Port FC Port Ethernet Port Ethernet Port Ethernet Port Ethernet Port Ethernet Bridge
25.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. FCoE Frame Mapping Module 6: IP SAN and FCoE 25 2 - Data Link 7 - Application 6 - Presentation 5 - Session 4 - Transport 3 - Network 1 - Physical FC - 4 FC - 3 FC - 2 FCoE Mapping 2 - MAC 1 - Physical FC - 0 Physical FC - 1 Data enc/dec FC - 2 Framing FC - 3 Services FC - 4 Protocol map IEEE 802.1q Layers FCoE Protocol Stack OSI Stack FC Protocol Stack Ethernet FC Layers
26.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Converged Enhanced Ethernet • Provides lossless Ethernet • Lossless Ethernet requires following functionalities: Priority-based flow control (PFC) Enhanced transmission selection (ETS) Congestion notification (CN) Data center bridging exchange protocol(DCBX) Module 6: IP SAN and FCoE 26
27.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Priority-Based Flow Control (PFC) • Creates eight virtual links on a single physical link • Uses PAUSE capability of Ethernet for each virtual link A virtual link can be paused and restarted independently PAUSE mechanism is based on user priorities or classes of service Module 6: IP SAN and FCoE 27
28.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Enhanced Transmission Selection (ETS) • Allocates bandwidth to different traffic classes such as LAN, SAN, and Inter Process Communication (IPC) • Provides available bandwidth to other classes of traffic when a particular class of traffic does not use its allocated bandwidth Module 6: IP SAN and FCoE 28
29.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Congestion Notification (CN) • Provides a mechanism for detecting congestion and notifying the source Enables a switch to send a signal to other ports that need to stop or slow down their transmissions Module 6: IP SAN and FCoE 29 Rate limiting to avoid packet loss Congestion Notification Message FCoE Switch FCoE Switch FCoE Switch Storage Array (Node B) Host (Node A) Congestion
30.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Data Center Bridging Exchange Protocol (DCBX) • Enables CEE devices to convey and configure their features with other CEE devices in the network Allows a switch to distribute configuration values to attached adapters • Ensures consistent configuration across network Module 6: IP SAN and FCoE 30
31.
EMC Proven Professional.
Copyright © 2012 EMC Corporation. All Rights Reserved. Module 6: Summary Key points covered in this module: • IP SAN protocols, their components, and topologies • FCoE protocol, its components, and topology Module 6: IP SAN and FCoE 31
Hinweis der Redaktion
1
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
Module 6: IP SAN and FCoE
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