IBM Z10 BC manual Dynamic LAN idle for z/OS, Link aggregation for z/VM in Layer 2 mode

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OSA-Express Network Traffi c Analyzer is exclusive to the z10 BC, z9 BC, z10 EC, and z9 EC, and is applicable to the OSA-Express3 and OSA-Express2 features when confi gured as CHPID type OSD (QDIO), and is supported by z/OS.

Dynamic LAN idle for z/OS

Dynamic LAN idle is designed to reduce latency and improve network performance by dynamically adjusting the inbound blocking algorithm. When enabled, the z/OS TCP/IP stack is designed to adjust the inbound blocking algorithm to best match the application requirements.

For latency sensitive applications, the blocking algo- rithm is modifi ed to be “latency sensitive.” For streaming (throughput sensitive) applications, the blocking algorithm is adjusted to maximize throughput. The z/OS TCP/IP stack can dynamically detect the application requirements, making the necessary adjustments to the blocking algo- rithm. The monitoring of the application and the blocking algorithm adjustments are made in real-time, dynamically adjusting the application’s LAN performance.

System administrators can authorize the z/OS TCP/IP stack to enable a dynamic setting, which was previously a static setting. The z/OS TCP/IP stack is able to help determine the best setting for the current running application, based on system confi guration, inbound workload volume, CPU utilization, and traffi c patterns.

Link aggregation for z/VM in Layer 2 mode

z/VM Virtual Switch-controlled (VSWITCH-controlled) link aggregation (IEEE 802.3ad) allows you to dedicate an

OSA-Express2 (or OSA-Express3) port to the z/VM operat- ing system when the port is participating in an aggregated group when confi gured in Layer 2 mode. Link aggregation (trunking) is designed to allow you to combine multiple physical OSA-Express3 and OSA-Express2 ports (of the same type for example 1GbE or 10GbE) into a single logi- cal link for increased throughput and for nondisruptive failover in the event that a port becomes unavailable.

•Aggregated link viewed as one logical trunk and con- taining all of the Virtual LANs (VLANs) required by the LAN segment

•Load balance communications across several links in a trunk to prevent a single link from being overrun

•Link aggregation between a VSWITCH and the physical network switch

•Point-to-point connections

•Up to eight OSA-Express3 or OSA-Express2 ports in one aggregated link

•Ability to dynamically add/remove OSA ports for “on demand” bandwidth

•Full-duplex mode (send and receive)

•Target links for aggregation must be of the same type (for example, Gigabit Ethernet to Gigabit Ethernet)

The Open Systems Adapter/Support Facility (OSA/SF) will provide status information on an OSA port – its “shared” or “exclusive use” state. OSA/SF is an integrated component of z/VM.

Link aggregation is exclusive to System z10 and System z9, is applicable to the OSA-Express3 and OSA-Express2 features in Layer 2 mode when confi gured as CHPID type OSD (QDIO), and is supported by z/VM 5.3 and later.

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Contents IBM System z10 Business Class z10 BC Reference Guide Table of Contents IBM System z10 Business Class z10 BC Overview Think Big, Virtually LimitlessMore Solutions, More Affordable Special workloads, Specialty engines, affordable technologyNew Face Of System z Architecture Z10 BC ArchitectureArchitecture operating system support Page Commitment to system integrity VSE TPFLinux on System z Operating System ESA/390Z10 BC Page Page Z10 BC Design and Technology Z10 BC Model Z10 BC capacity identifiersMemory Dimm sizes 2 GB and 4 GB Z10 BC model upgrades Z10 BC Model Capacity IDsZ10 BC Performance Large System Performance ReferenceCPU Measurement Facility Z10 BC I/O Subsystem System I/O Configuration AnalyzerZ10 BC Channels and I/O Connectivity Concurrent Update Support of Spanned Channels and Logical PartitionsModes of Operation Ficon Support for Cascaded Directors FCP ChannelsFCP Full fabric connectivity FCP increased performance for small block sizesScsi IPL now a base function High Performance Ficon improvement in performancePreplanning and setup of SAN for a System z10 environment Platform and name server registration in Ficon channelNPort ID Virtualization DistanceFicon Express enhancements for Storage Area Networks Program Directed re-IPLFicon Link Incident Reporting Serviceability EnhancementsFeature Infrastructure Ports per OSA-Express3 the newest family of LAN adaptersOSA-Express3 Ethernet features Summary of benefits OSA-Express2 availabilityType FeaturesPurpose/Traffic OSA-Express3 10 Gigabit Ethernet LROSA-Express3 1000BASE-T Ethernet OSA-Express3-2P Gigabit Ethernet SXFour-port exploitation on OSA-Express3 GbE SX and LX OSA-Express3-2P 1000BASE-T EthernetNetwork Traffic Analyzer Link aggregation for z/VM in Layer 2 mode Dynamic LAN idle for z/OSLayer 2 transport mode When would it be used? OSA Layer 3 Virtual MAC for z/OSIBM Communication Controller for Linux CCL Direct Memory Access DMAHardware data router OSA-Express3 and OSA-Express2 OSN OSA for NCPOSA 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 Enhancements to CP Assist for Cryptographic Func Tion Cpacf Configurable Crypto Express2Crypto Express2-1P Dynamically add crypto to a logical partition Support for ISOSupport for RSA keys up to 4096 bits Secure Key AESEnhancement with TKE 5.3 LIC Support for 13- thru 19-digit Personal Account NumbersTKE 5.3 workstation Smart Card ReaderRemote Loading of Initial ATM Keys TKE additional smart cards new featureSystem z10 BC cryptographic migration Remote Key Loading BenefitsOn 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 FocusHardware System Area HSA Enhanced Driver MaintenanceAvailability Functions Redundant I/O InterconnectService Enhancements Dynamic Oscillator SwitchoverConcurrent Memory Upgrade Transparent SparingEnvironmental Enhancements Power MonitoringPower Estimation Tool IBM Systems Director Active Energy ManagerImproved service time with Coupling Facility Duplex Parallel Sysplex Cluster TechnologyCoupling Facility Control Code Cfcc Level Coupling Facility Configuration Alternatives System-Managed CF Structure DuplexingParallel Sysplex Coupling Connectivity Introducing long reach InfiniBand coupling linksCoupling Connectivity for Parallel Sysplex Server Time Protocol STP Z10 Coupling Link OptionsTime synchronization and time accuracy on z10 BC Server Time Protocol enhancementsPreview Improved STP System Management with Enhanced STP recovery when Internal Battery Feature Continuous Availability of NTP servers used as ExterInternal Battery Feature Recommendation Application Programming Interface API to automateInternet Protocol, Version 6 IPv6 HMC System SupportFamily Machine Type HMC/SE Console MessengerEnhanced installation support for z/VM using the HMC HMC z/VM Tower System Management EnhancementsImplementation Services for Parallel Sysplex Fiber Quick Connect for Ficon LX Environments GdpsZ10 BC Highlights and Physical Dimensions Z9 BC Z10 BC Physical CharacteristicsZ10 BC System Power Physical PlanningZ10 BC Configuration Detail Z10 BC Concurrent PU ConversionsIBF Z10 BC Model StructureZ10 BC Minimum Maximum Z10 BC IBF hold uptime Drawer DrawersCoupling Facility CF Level of Support Z890Statement of Direction Available in the Library section of Resource Link PublicationsFollowing Redbook publications are available now Resource LinkZSO03021-USEN-02
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