Brocade Fibre Channel Routing FCR Technology Overview

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Table of Contents,Introduction 3,Meta SAN Overview 4. Fibre Channel Routing FCR Overview 7,Phantom Domains and Devices 10. Introduction to Brocade Fibre Channel Routing FCR Products 11. FCR Router Support Limitations Scalability 14,FCR Implementation 14. Backbone ID 15,Configuring Brocade Interfabric Links IFLs 16. Configuration of LSAN Zones on 2nd Fabric 17,FCR Large Implementation Customer Study 17.
Conclusion 20,FCR Terminology Glossary 21,Author Biography 24. Disclaimer The views processes or methodologies published in this compilation are those of the. author They do not necessarily reflect EMC Corporation s views processes or methodologies. INTRODUCTION, The current growth of SAN fabrics in most large environments has exceeded or will. exceed the scalability limits of implemented SAN solution s The business growth of the. SAN is increasing tied to the mandatory need to store data for extended periods of time. regulatory demands and is also influenced by the type of data being stored records. images etc, The rapid growth and increasing complexity of enterprise SANs have been the driving. force behind the adoption of multi protocol SAN routers As organizations continue to. expand they require more comprehensive solutions than traditional FC fabrics can. provide SAN extension has become a primary concern for many enterprise SAN. customers Brocade has developed routing services that increase SAN functionality. scalability and flexibility, A SAN Storage Area Network connects a group of servers to their shared storage. devices disk arrays virtual tape libraries tape drives etc through an interconnection of. fabric that would typically include switches and links Brocade has introduced several. new products that enhance SAN internetworking through Fibre Channel Routing FCR. technologies,Fabric A Fabric, Merging SAN fabrics has been complex and time consuming for SAN administrators and.
SAN engineers We can now expand Brocade SAN fabrics without merging fabrics. through the proper implementation of Fibre Channel Routing FCR hardware and. Meta SAN Overview, When single SAN switches are connected to each other they form a SAN fabric When. they are connected through an FCR approach they form a different SAN This results in. a Routed SAN called a Meta SAN, A Meta SAN is a collection of SAN devices switches edge fabrics Logical Storage Area. Networks LSANs and Routers that comprise a physically connected but logically. partitioned storage network A simple Meta SAN can be constructed using an EMC. Select 7500 Connectrix ED 48000B with a Connectrix PB 48K 18I blade to connect two. or more separate fabrics Additional EMC Select 7500s Connectrix ED 48000B with. Connectrix PB 48K 18I blades can be used to increase the available bandwidth. between fabrics and for redundancy, Each edge fabric in the Meta SAN remains a SAN island and will be referred to an edge. fabric Edge fabrics maintain separate fabric services such as name services zoning. databases routing tables domain ID spaces etc, This ability to maintain separate services greatly reduces management problems like. domain and zoning conflicts that would otherwise be a concern when merging a fabric. Diagram Meta SAN Overview, We will never eliminate the need to increase port counts and share resources across.
geographical and functional boundaries Moreover our need to ensure secure. connectivity for selected resources especially in heterogeneous environments further. compounds the troubleshooting fault isolation and management challenges posed by. large SANs, FC routing addresses these issues by enabling organizations to connect devices in. different SANs without merging the fabrics In this way organizations can share. resources across multiple SANs and scale beyond current SAN port count support. constraints, In addition they can more easily support multiple firmware revisions and connect. devices between SANs purchased from and supported by different OEMs or from. different SAN platform vendors as business needs dictate. This level of SAN connectivity offers organizations a powerful tool to reduce or even. eliminate disruptions associated with many common operational events such as. Migration to new SAN infrastructure where FC routing can be used to migrate. SANs and devices from 1 or 2 Gbit sec to 4 Gbit sec systems. Data center consolidation where the Connectrix PB 48K 18I blade and EMC Select. 7500 Router can enable data movement between locations adding particular value. when FC routing is combined with FCIP, Mutual data center backup or mirroring where the Connectrix PB 48K 18I blade. and EMC Select 7500 Router enable two major data centers to act as backup. facilities for each other This application often involves FCIP and the tight. integration of FCIP and FC routing is usually a value add for the customer. Storage and application rebalancing between fabrics where the Connectrix PB. 48K 18I blade and EMC Select 7500 Router can connect devices in previously. isolated SANs, Data migration between test development SANs and production SANs enabling. data movement between physically or logically separated environments. Data migration or sharing between SANs containing different firmware releases. Data migration between Brocade and McDATA fabrics,Benefits of META SAN CONNECTIVITY.
Scalability Growing SAN environments much more efficiently and maximizing. the value of high end resources, Security Connecting devices in different SANs without merging the SANs. organizations can support secure selective resource sharing through LSANs. Centralization Centralization makes it easier to manage equipment from. multiple vendors which increases operational flexibility and enables the. deployment of a best in class environment,EXAMPLE OF EMC META SAN DISTANCE CONNECTIVTY. Notice in the EMC Meta SAN diagram above,1 Fabric is HA Redundant Fabric with Dual IFLs. 2 Symmetrically organized by port number and slot number. 3 Host and Storage are in different locations,Fibre Channel Routing FCR Overview. The need to create Fibre Channel SANs that can grow in a scalable cost effective. manner is a basic business requirement For example organizations with multiple SAN. islands need to connect them into a more unified centrally managed SAN environment. Unfortunately many organizations have avoided merging their SAN islands in fear that. the administrative workload risk and expense would not justify the benefits of enhanced. connectivity, However the ability to seamlessly integrate Brocade FC routing into existing SAN.
fabrics and realize the benefits of centralized management while maintaining fabric. separation is changing that perception Running on the Connectrix PB 48K 18I blade. and EMC Select 7500 switch FC routing enables devices located on separate SAN. fabrics to communicate without the need to merge the fabrics into a large SAN. environment By using this service organizations can interconnect devices without. having to redesign and reconfigure their entire environment thereby eliminating the. potential downtime risks and costs, The resulting routed network consists of multiple individual SAN fabrics forming one. storage network connectivity model known as a Meta SAN In this way FC routing. offers key strategic advantages, Simplifying SAN design implementation and management through centralization. Providing a seamless and secure means to share resources across multiple SANs. without physically merging those SANs, Creating a more unified SAN environment with easier interconnection and support. for SANs and SAN resources purchased from different storage vendors. Reducing disruptions created by events such as data migration storage or server. consolidation migration to production environments and application rebalancing. between fabrics, When devices on different fabrics are allowed to communicate through FC routing the. resulting connectivity group is known as a Logical SAN LSAN LSANs enable selective. and secure resource sharing across multiple SANs by leveraging existing zoning tools. and methodologies, In addition to optimizing resource utilization this approach helps improve scalability by.
Minimizing the risk and complexity of large fabrics. Right sizing SANs based on application and business requirements. Simplifying management and fault isolation, Protecting and extending current technology investments since LSANs require no. changes to existing SAN switches or attached edge devices but do leverage. existing zoning tools, The Brocade FC FC routing service FCRS provides connectivity between two or more. fabrics without the need to merge the fabrics This allows the creation of Logical Storage. Area Networks LSAN that provide connectivity that can span fabrics without actually. merging the fabrics, This service is implemented on the router as an EX port The fact that FCR can. connect fabrics without merging the fabrics has advantages in terms of scalability. network management change management availability and serviceability. It is import to note that the act of projecting a node into another fabric is called exporting. When a host is exported from Fabric 1 into Fabric 2 it also must be imported into Fabric. 2 from Fabric 1, To create an LSAN both exporting and importing must occur so these statements are. functionally equivalent in normal cases, An LSAN must be created on both sides of the router LSAN zones are indistinguishable.
to an edge fabric from any other kind of zone which is why they are compatible with. previous Brocade Fabric Operating System Fabric OS versions. There are just two distinguishing features of an LSAN zone. First they must begin with the prefix LSAN so that routers will recognize them. Second they must contain only port WWNS or aliases of devices intended for inter. fabric sharing, This is because Fibre Channel Port IDs PIDs are not unique identifiers in a Meta SAN. The same PID can exist in multiple edge fabrics so a router would not know what the. administrator wanted to do if PIDs were used to create LSAN zones This constraint. however does not preclude the use of PID based zoning in edge fabrics for other zones. Those zones continue to work as usual, When a set of devices on different edge fabrics are allowed to communicate through an. FC router in this way the resulting connectivity group is an LSAN. Many different LSANs can exist in a Meta SAN in the same way that many zones can. exist within a single fabric Indeed many different LSANs can exist between any given. set of fabrics Devices can be members of multiple LSANs and LSANs can overlap with. traditional zoning mechanisms on local fabrics as well. Fiber Channel Routing is somewhat equivalent to an IP router like a firewall since when. the FCR services are on they use a DENY all approach The SAN administrator must. use an ACL approach through the use of zoning to allow traffic to flow between fabrics. Since FCR has some significant new terminology that SAN Administrators and SAN. Engineers may not be familiar with it is important to clarify the terminology we will use in. this article This terminology is clarified in the FCR Terminology Glossary in the back of. this article,PHANTOM DOMAINS AND DEVICES, The router introduces a new model where a phantom topology is presented It consists. of phantom domains and phantom devices and does not correlate directly to physical. entities The phantom topology is presented via protocols such as Fabric Shortest Path. First Name Server Management Server etc It is important to understand that this is. automatically done by the routers FC NAT protocols. All devices that are translated between fabrics are hung off of xlate domains To. maximize FC NAT address space translated devices are given FC PIDs using both the. area and port bytes so to the human eye xlate addresses may look like NL Port devices. in destination fabrics even if they are really N Ports in their source fabrics. While these PIDs are made up by the router whatever PID is used for any given. device exported into any given edge fabric is persistent Even simultaneously rebooting. every host storage and network device in the Meta SAN including all routers will not. cause any xlate PIDs to change, NOTE Translation table can be saved and loaded using the configUpload. configDownload commands, Please review the Glossary for a detailed overview of PHANTOM DOMAINS.
FCR REVIEW, The Brocade FC FC routing service FCRS provides connectivity between two or more. fabrics without merging the fabrics This allows the creation of Logical Storage Area. Networks LSAN that can provide connectivity to span fabrics LSAN is a zone that. spans fabrics and allows connectivity without actually merging the fabrics This service is. implemented on the router as an EX port, The fact that FCR can connect fabrics without merging the fabrics has advantages. scalability,network management,change management,availability. serviceability,economical,FCR routing is, Logically connected to SAN islands and shares resources across multiple fabrics. Maintained through administration and fault isolation of separately managed. Supported by any tool that supports zoning,FCR Solves problems like.
Scaling SANs for number of ports,Scaling SAN s over distance. Allowing the combination of SANs that do not have direct E port. Fibre Channel Routing FCR Overview The need to create Fibre Channel SANs that can grow in a scalable cost effective manner is a basic business requirement For example organizations with multiple SAN islands need to connect them into a more unified centrally managed SAN environment

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