IBM System z10 EC Reference Manual

Also see for System z10 EC: Reference guide

Contents

22the pattern of acknowledgement traffic, packet size, theapplication, TCP/IP, the network, the disk subsystem, andthe number of clients being served.The OSA-Express3 10 GbE has been designed with twoPCI adapters, each with one port. Doubling the port densityon a single feature helps to reduce the number of I/O slotsrequired for high speed connectivity to the Local Area Net-work (LAN). Each port continues to be defined as CHPIDtype OSD, supporting the Queued Direct Input/Output(QDIO) architecture for high speed TCP/IP communication.OSA-Express3 10 GbE LR is exclusive to z10 EC and sup-ports CHPID type OSD. It is supported by z/OS, z/VM,z/VSE, z/TPF, and Linux on System z.The OSA-Express2 1000BASE-T EthernetIBM System z10 EC continues to support the expandedfamily of OSA-Express2 features which include 1000BASE-TEthernet, supporting a link data rate of 10, 100, or 1000Mb/sec over a copper infrastructure. The OSA-Express21000BASE-T Ethernet feature continues to provide supportfor:• OSA-Integrated Console Controller (OSA-ICC)– TN3270E and non-SNA DFT 3270 emulation• Queued Direct Input/Output (QDIO), CHPID type OSD,for TCP/IP traffic when using Layer 3, and protocol-inde-pendent packet forwarding when using Layer 2 (z/VMand Linux on System z10 EC and System z9)• Non-QDIO, CHPID type OSE, for SNA/APPN/HPR and/orTCP/IP traffic• Checksum Offload (exclusive to QDIO mode, CHPIDtype OSD)• Spanned channels and sharing among logical partitions• Jumbo frames in QDIO mode (when operating at 1 Gb/sec)• Auto-negotiation (the target device must also be set toauto-negotiate)• Category 5 Unshielded Twisted Pair (UTP) cablingThe OSA-Express2 1000BASE-T Ethernet feature supportsthe following modes of operation:• OSA-ICC (CHPID type OSC), for 3270 data streams• QDIO (CHPID type OSD), for TCP/IP traffic when Layer3, and for protocol-independent when Layer 2• Non-QDIO (CHPID type OSE), for TCP/IP and/or SNA/APPN/HPR traffic• OSA for NCP (CHPID type OSN), to provide channelconnectivity between operating systems and CCLThe OSA-Express2 1000BASE-T Ethernet feature is a dual-port feature occupying a single I/O slot and utilizes oneCHPID per port; two CHPIDs per feature. Each port canbe independently configured as CHPID type OSC, OSD,OSE, or OSN. The OSA-Express2 1000BASE-T Ethernetfeature is offered on new builds while the OSA-Express1000BASE-T Ethernet feature can be carried forward on anupgrade from a System z9, z990 or z900 server.OSA-Express2 Gigabit EthernetThe third generation of Gigabit Ethernet features isdesigned to support line speed – 1 Gb/sec in eachdirection or 2 Gb/sec full duplex and support the followingfunctions:• QDIO architecture• Layer 2• Spanned channels• SNMP• IPv4 and IPv6• 640 TCP/IP stacks per CHPID• Jumbo frames (8992 byte frame size)• Large send, for TCP/IP traffic and CPU efficiency,offloading the TCP segmentation processing from thehost TCP/IP stack• Concurrent LIC update• OSA-Express2 OSN (OSA for NCP)