IBM System z10 EC Reference Manual

Also see for System z10 EC: Reference guide

Contents

21This 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 configuration setup• Allow WebSphere Application Server content-basedrouting to work with z/OS in an IPv6 network• Allow z/OS to use a “standard” interface ID for IPv6addresses• Remove the need for PRIROUTER/SECROUTER functionin z/OSVMACs are currently available for Layer 2 mode in thez/VM and Linux on System z10 EC and System z9 environ-ments. OSA Layer 3 VMAC is exclusive to z10 EC, z9 ECand z9 BC, is applicable to the OSA-Express3 LR, andOSA-Express2 features when configured as CHPID typeOSD (QDIO), and is supported by z/OS (and z/VM for z/OSguest exploitation).OSA-Express3 and OSA-Express2 Ethernet features on z10 ECThe OSA-Express3 and OSA-Express2 features provideyou with the function and scalability required to help satisfythe demands of your global businesses. With data ratesof 10 or 100 Megabits per second (Mb/sec), 1 Gigabitper second (Gb/ sec), and 10 Gb/sec, you can select thefeatures that best suit your current and your future applica-tion requirements.• OSA-Express3 10 Gigabit Ethernet LR• OSA-Express2 Gigabit Ethernet LX• OSA-Express2 Gigabit Ethernet SX• OSA-Express2 1000BASE-T Ethernet• OSA-Express2 10 Gigabit Ethernet LRThe OSA-Express3 and OSA-Express2 Ethernet featuressupport the following CHPID types:CHPID OSA-Express3/ Purpose / TrafficType OSA-Express2FeaturesOSC 1000BASE-T TN3270E, non-SNA DFT,IPL CECs and logical partitionsOperating system console operationsOSD 1000BASE-T QDIO,GbE 10 TCP/IP traffic when Layer 3,GbE Protocol-independent when Layer 2OSE 1000BASE-T Non-QDIO, SNA/APPN®/HPR and/orTCP/IPOSN 1000BASE-T OSA for NCP providing support for IBMGbE Communication Controller for Linux (CCL)Introducing OSA-Express3 10 GbE LR – designed to deliverincreased throughputPlanned to be available second quarter 2008*, OSA-Express3 10 Gigabit Ethernet (GbE) has been designed toincrease the throughput for standard frames (1492 byte)and jumbo frames (8992 byte) compared to OSA-Express210 GbE to help satisfy the bandwidth requirements ofyour applications. This increase in performance has beenachieved; an enhancement to the architecture supportsdirect host memory access by using a data router, elimi-nating “store and forward” delays.When OSA-Express3 10 GbE LR becomes available, OSA-Express2 10 GbE LR will no longer be available for ordering.The 10 GbE feature does not support auto-negotiation toany other speed; it supports 64B/66B coding, whereasGbE supports 8B/10B coding. Therefore, auto-negotiationto any other speed is not possible.The OSA-Express3 10 Gigabits per second (Gbps) linkdata rate does not represent the actual throughput of theOSA-Express3 10 GbE LR feature. Actual throughput isdependent upon many factors, including traffic direction,