IBM Z10 BC manual Layer 2 transport mode When would it be used?, OSA Layer 3 Virtual MAC for z/OS

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Layer 2 transport mode: When would it be used?

If you have an environment with an abundance of Linux images in a guest LAN environment, or you need to defi ne router guests to provide the connection between these guest LANs and the OSA-Express3 features, then using the Layer 2 transport mode may be the solution. If you have Internetwork Packet Exchange (IPX), NetBIOS, and SNA pro- tocols, in addition to Internet Protocol Version 4 (IPv4) and IPv6, use of Layer 2 could provide “protocol independence.”

The OSA-Express3 features have the capability to perform like Layer 2 type devices, providing the capability of being protocol- or Layer-3-independent (that is, not IP-only).

With the Layer 2 interface, packet forwarding decisions are based upon Link Layer (Layer 2) information, instead of Network Layer (Layer 3) information. Each operating system attached to the Layer 2 interface uses its own MAC address. This means the traffi c can be IPX, NetBIOS, SNA, IPv4, or IPv6.

An OSA-Express3 feature can fi lter inbound datagrams by Virtual Local Area Network identifi cation (VLAN ID, IEEE 802.1q), and/or the Ethernet destination MAC address. Fil- tering can reduce the amount of inbound traffi c being pro- cessed by the operating system, reducing CPU utilization.

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).

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Contents IBM System z10 Business Class z10 BC Reference Guide Table of Contents Think Big, Virtually Limitless IBM System z10 Business Class z10 BC OverviewSpecial workloads, Specialty engines, affordable technology More Solutions, More AffordableNew Face Of System z Z10 BC Architecture ArchitectureArchitecture operating system support Page Commitment to system integrity TPF VSEOperating System ESA/390 Linux on System zZ10 BC Page Page Z10 BC Design and Technology Z10 BC capacity identifiers Z10 BC ModelMemory Dimm sizes 2 GB and 4 GB Z10 BC Model Capacity IDs Z10 BC model upgradesLarge System Performance Reference Z10 BC PerformanceCPU Measurement Facility System I/O Configuration Analyzer Z10 BC I/O SubsystemZ10 BC Channels and I/O Connectivity Support of Spanned Channels and Logical Partitions Concurrent UpdateModes of Operation FCP Channels Ficon Support for Cascaded DirectorsHigh Performance Ficon improvement in performance FCP increased performance for small block sizesScsi IPL now a base function FCP Full fabric connectivityPlatform and name server registration in Ficon channel Preplanning and setup of SAN for a System z10 environmentProgram Directed re-IPL DistanceFicon Express enhancements for Storage Area Networks NPort ID VirtualizationOSA-Express3 the newest family of LAN adapters Serviceability EnhancementsFeature Infrastructure Ports per Ficon Link Incident ReportingOSA-Express2 availability OSA-Express3 Ethernet features Summary of benefitsOSA-Express3 10 Gigabit Ethernet LR FeaturesPurpose/Traffic TypeOSA-Express3-2P 1000BASE-T Ethernet OSA-Express3-2P Gigabit Ethernet SXFour-port exploitation on OSA-Express3 GbE SX and LX OSA-Express3 1000BASE-T EthernetNetwork Traffic Analyzer Dynamic LAN idle for z/OS Link aggregation for z/VM in Layer 2 modeOSA Layer 3 Virtual MAC for z/OS Layer 2 transport mode When would it be used?OSA-Express3 and OSA-Express2 OSN OSA for NCP Direct Memory Access DMAHardware data router IBM Communication Controller for Linux CCLRemove L2/L3 LPAR-to-LPAR Restriction OSA Integrated Console ControllerOSA/SF Virtual MAC and Vlan id Display Capability HiperSockets HiperSockets Enhancement for zIIP Exploitation Can Do IT securely Security CryptographyCP Assist for Cryptographic Function Cpacf Configurable Crypto Express2 Enhancements to CP Assist for Cryptographic Func Tion CpacfCrypto Express2-1P Secure Key AES Support for ISOSupport for RSA keys up to 4096 bits Dynamically add crypto to a logical partitionSmart Card Reader Support for 13- thru 19-digit Personal Account NumbersTKE 5.3 workstation Enhancement with TKE 5.3 LICRemote Key Loading Benefits TKE additional smart cards new featureSystem z10 BC cryptographic migration Remote Loading of Initial ATM KeysCapacity on Demand Temporary Capacity On Demand CapabilitiesAmendment for CBU Tests Capacity Provisioning System z9 System z10 OS Capacity provisioning allows you to set up rulesRAS Design Focus Reliability, Availability, and Serviceability RASRedundant I/O Interconnect Enhanced Driver MaintenanceAvailability Functions Hardware System Area HSATransparent Sparing Dynamic Oscillator SwitchoverConcurrent Memory Upgrade Service EnhancementsIBM Systems Director Active Energy Manager Power MonitoringPower Estimation Tool Environmental EnhancementsParallel Sysplex Cluster Technology Improved service time with Coupling Facility DuplexCoupling Facility Control Code Cfcc Level System-Managed CF Structure Duplexing Coupling Facility Configuration AlternativesIntroducing long reach InfiniBand coupling links Parallel Sysplex Coupling ConnectivityCoupling Connectivity for Parallel Sysplex Server Time Protocol enhancements Z10 Coupling Link OptionsTime synchronization and time accuracy on z10 BC Server Time Protocol STPPreview Improved STP System Management with Continuous Availability of NTP servers used as Exter Enhanced STP recovery when Internal Battery FeatureApplication Programming Interface API to automate Internal Battery Feature RecommendationHMC/SE Console Messenger HMC System SupportFamily Machine Type Internet Protocol, Version 6 IPv6HMC z/VM Tower System Management Enhancements Enhanced installation support for z/VM using the HMCImplementation Services for Parallel Sysplex Gdps Fiber Quick Connect for Ficon LX EnvironmentsPhysical Planning Z10 BC Physical CharacteristicsZ10 BC System Power Z10 BC Highlights and Physical Dimensions Z9 BCZ10 BC Concurrent PU Conversions Z10 BC Configuration DetailZ10 BC IBF hold uptime Drawer Drawers Z10 BC Model StructureZ10 BC Minimum Maximum IBFZ890 Coupling Facility CF Level of SupportStatement of Direction Resource Link PublicationsFollowing Redbook publications are available now Available in the Library section of Resource LinkZSO03021-USEN-02
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