IP Hardware Requirements

Communications Server provides direct LAN communication and provides for point-to-point communication over S/390® channels (ESCON or Block Multiplex) to several IBM® and equivalent other vendor devices.
  • Direct LAN communication is provided by IBM Open Systems Adapter - Express®.
  • Point-to-point communication over z Systems™ channels is supported with the following devices:
    • IBM RS/6000®
    • IBM Channel-to-Channel Adapter
A z13, Start of changez13s,End of change zEC12, zBC12, z196, or z114 server is required to use the following functions:
  • Support for z/OS® Communications Server for intra ensemble networks
  • OSA-Express4S QDIO IPv6 checksum and segmentation offload
A z13, Start of changez13s,End of change zEC12, zBC12, z196, z114, or System z10™ server is required to use the following functions:
  • OSA-Express optimized latency mode
  • OSA-Express inbound workload queueing
  • Support for z/OS Communications Server for intra ensemble networks
A z13, Start of changez13s,End of change zEC12, zBC12, z196, z114, or System z10 server is required to use the following functions:
  • OSA-Express network traffic analyzer
  • OSA-Express virtual MAC
  • QDIO diagnostic synchronization
  • QDIO support for OSA interface isolation
A z13, Start of changez13s,End of change zEC12, zBC12, z196, z114, or System z10 server is required to use the following functions:
  • ICSF encryption/decryption instructions, called crypto assist, which provide synchronous clear key support for DES, TDES, and SHA-1 algorithms for IPSEC.
  • The checksum offload of IPv4 packets enhancement. An OSA-Express with a supporting level of microcode is also required.
  • IPv4 Broadcast support for HiperSockets™.
  • Segmentation Offload (Large Send). An OSA-Express with a supporting level of microcode is also required.
Parent topic: Hardware Requirements for Communications Server