IBM Z10 EC manual OSA Layer 3 Virtual MAC for z/OS, Direct Memory Access DMA, Hardware data router

Page 30

Layer 2 transport mode is supported by z/VM and Linux on System z.

OSA Layer 3 Virtual MAC for z/OS

To simplify the infrastructure and to facilitate load balanc- ing when an LPAR is sharing the same OSA Media Access Control (MAC) address with another LPAR, each operating system instance can now have its own unique “logical” or “virtual” MAC (VMAC) address. All IP addresses associ- ated with a TCP/IP stack are accessible using their own VMAC address, instead of sharing the MAC address of an OSA port. This applies to Layer 3 mode and to an OSA port shared among Logical Channel Subsystems.

This support is designed to:

•Improve IP workload balancing

•Dedicate a Layer 3 VMAC to a single TCP/IP stack

•Remove the dependency on Generic Routing Encapsu- lation (GRE) tunnels

•Improve outbound routing

•Simplify confi guration setup

•Allow WebSphere Application Server content-based routing to work with z/OS in an IPv6 network

•Allow z/OS to use a “standard” interface ID for IPv6 addresses

•Remove the need for PRIROUTER/SECROUTER function in z/OS

OSA Layer 3 VMAC for z/OS is exclusive to System z, and is applicable to OSA-Express3 and OSA-Express2 features when confi gured as CHPID type OSD (QDIO).

Direct Memory Access (DMA)

OSA-Express3 and the operating systems share a common storage area for memory-to-memory communi- cation, reducing system overhead and improving perfor- mance. There are no read or write channel programs for data exchange. For write processing, no I/O interrupts have to be handled. For read processing, the number of I/O interrupts is minimized.

Hardware data router

With OSA-Express3, much of what was previously done in

firmware (packet construction, inspection, and routing) is now performed in hardware. This allows packets to fl ow directly from host memory to the LAN without fi rmware intervention.

With the hardware data router, the “store and forward” technique is no longer used, which enables true direct memory access, a direct host memory-to-LAN fl ow, return- ing CPU cycles for application use.

This avoids a “hop” and is designed to reduce latency and to increase throughput for standard frames (1492 byte) and jumbo frames (8992 byte).

IBM Communication Controller for Linux (CCL)

CCL is designed to help eliminate hardware dependen- cies, such as 3745/3746 Communication Controllers, ESCON channels, and Token Ring LANs, by providing a software solution that allows the Network Control Program (NCP) to be run in Linux on System z freeing up valuable data center fl oor space.

CCL helps preserve mission critical SNA functions, such as SNI, and z/OS applications workloads which depend upon these functions, allowing you to collapse SNA inside a z10 EC while exploiting and leveraging IP.

The OSA-Express3 and OSA-Express2 GbE and 1000BASE-T Ethernet features provide support for CCL. This support is designed to require no changes to operat- ing systems (does require a PTF to support CHPID type OSN) and also allows TPF to exploit CCL. Supported by z/VM for Linux and z/TPF guest environments.

OSA-Express3 and OSA-Express2 OSN (OSA for NCP)

OSA-Express for Network Control Program (NCP), Chan- nel path identifi er (CHPID) type OSN, is now available for use with the OSA-Express3 GbE features as well as the OSA-Express3 1000BASE-T Ethernet features.

30

Page 29 Page 31
Image 30
Page 29 Page 31
Contents IBM System z10 Enterprise Class z10 EC Reference Guide Table of Contents IBM System z10 Enterprise Class z10 EC Overview Just-in-time deployment of IT resources Specialty engines offer an attractive alternativeOrder of introduction Numerical computing on the chipEvolving for your business ArchitectureLiberating your assets with System z Z10 EC ArchitecturePage Commitment to system integrity Page VSE TPFLinux on System z Z10 EC Operating System ESA/390Page Page Z10 EC Design and Technology Z10 EC Model Z10 EC model upgrades Z10 EC Base and Sub-capacity OfferingsZ10 EC Performance Large System Performance ReferenceCPU Measurement Facility Z10 EC I/O Subsystem System I/O Configuration AnalyzerZ10 EC Channels and I/O Connectivity Support of Spanned Channels and Logical Partitions Concurrent UpdateFicon Express4 and Ficon Express2 Performance Modes of OperationFicon Support for Cascaded Directors FCP ChannelsFCP increased performance for small block sizes Ficon and FCP for connectivity to disk, tape, and printers Scsi IPL now a base functionFCP Full fabric connectivity Platform and name server registration in Ficon channelIt will register NPort ID Virtualization Program Directed re-IPLFeature Infrastructure Ports per OSA-Express3 Ethernet features Summary of benefitsPort density or granularity Purpose/Traffic FeaturesOSA-Express2 availability TypeOSA-Express3 Gigabit Ethernet SX OSA-Express3 10 Gigabit Ethernet SROSA-Express3 Gigabit Ethernet LX Four-port exploitation on OSA-Express3 GbE SX and LXNetwork Traffic Analyzer Dynamic LAN idle for z/OSLink aggregation for z/VM in Layer 2 mode Layer 2 transport mode When would it be used?Hardware data router Direct Memory Access DMAOSA Layer 3 Virtual MAC for z/OS IBM Communication Controller for Linux CCLOSA Integrated Console Controller Remove L2/L3 LPAR-to-LPAR RestrictionOSA/SF Virtual MAC and Vlan id Display Capability HiperSockets HiperSockets Enhancement for zIIP Exploitation Security Cryptography Can Do IT securelyCP Assist for Cryptographic Function Cpacf Configurable Crypto Express2 Dynamically add crypto to a logical partition Secure Key AESTKE additional smart cards TKE 5.3 workstation and support for Smart Card ReaderEnhancement with TKE 5.3 LIC System z10 EC cryptographic migrationRemote Loading of Initial ATM Keys Remote Key Loading BenefitsImproved Key Exchange With Non-CCA Cryptographic Systems On Demand Capabilities Capacity on Demand Temporary CapacityAmendment for CBU Tests Capacity Provisioning OS Capacity provisioning allows you to set up rules System z9 System z10Reliability, Availability, and Serviceability RAS RAS Design FocusAvailability Functions Hardware System Area HSAEnhanced Book Availability Concurrent Defective Book Replacement Concurrent Physical Memory UpgradeConcurrent Physical Memory Replacement Enhanced Driver MaintenanceTransparent Sparing Plan Ahead MemoryPower Estimation Tool Service EnhancementsPower Monitoring Environmental EnhancementsParallel Sysplex Cluster Technology IBM Systems Director Active Energy ManagerImproved service time with Coupling Facility Duplex Coupling Facility Control Code Cfcc LevelCoupling Facility Configuration Alternatives System-Managed CF Structure DuplexingParallel Sysplex Coupling Connectivity Introducing long reach InfiniBand coupling links Coupling Connectivity for Parallel SysplexZ10 Coupling Link Options Z10 EC MaxTime synchronization and time accuracy on z10 EC Server Time Protocol STPPreview Improved STP System Management with Enhanced Network Time Protocol NTP client support Continuous availability of NTP servers used as ExterEnhanced STP recovery when Internal Battery Feature NTP server on Hardware Management Console HMCApplication Programming Interface API to automate Internal Battery Feature Recommendation Internet Protocol, Version 6 IPv6 HMC System SupportFamily Machine Type HMC/SE Console MessengerHMC z/VM Tower systems management enhancements Implementation Services for Parallel Sysplex GdpsFiber Quick Connect for Ficon LX Environments Z10 EC Environmentals Model O Cage Z10 EC Physical Characteristics Z10 EC Configuration DetailZ10 EC Dimensions Z9 EC Number of Frames 2 Frame Model O CageCPs IFLs Processor Unit Features ModelOSA-Express3 and OSA-Express2 Features Min Max ICFsGeneral Information Coupling Facility CF Level of Support Z9 BCStatement of Direction Publications Following Redbook publications are available nowResource Link ZSO03018-USEN-02
Top Page Image Contents