5 Things To Know About Networking on z/VSE
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The importance of modern computer networks is steadily growing as increasing amounts of data are exchanged over company intranets and the Internet. Understanding current networking technologies and communication protocols available for the IBM mainframe and System z operating systems is essential. Here are 5 things to know when setting up your network infrastructure with z/VSE.
1. z/VSE supports the hardware features of the latest IBM zEnterprise processors.
It also supports various types of networking adapters such as OSA-Express, HiperSockets, and Intra-Ensemble Data Network. Software options include the different IP stacks available for z/VSE, TCP/IP for VSE/ESA, IPv6/VSE, and Fast Path to Linux on System z, as well as different networking protocols, such as IPv4 and IPv6.
2. z/VSE allows you to enable applications using IPv6.
An IPv6-enabled server application should be capable of accepting IPv4 clients as well as IPv6 clients concurrently. Server applications may have an option to restrict clients to IPv4 or IPv6 only, but they should be able to handle both. The server application should also be capable of detecting if a client is working with an IPv6 capable stack. Depending on the combination of the stack capabilities and client's address family (IPv4, IPv6), different code paths are executed, as you see below.
3. z/VSE supports a virtual resource called virtual local area network (VLAN).
VLAN allows a physical network to be divided administratively into separate logical networks. These logical networks operate as if they are physically independent of each other. z/VSE provides VLAN support for OSA-Express CHPID types OSD and OSX and HiperSockets devices. HiperSockets are a fast no-cost internal LAN connection.
4. z/VSE supports a virtual resource called virtual media access control address (VMAC).
VMAC support enables an OSA interface to have not only a physical MAC address, but also many distinct virtual MAC addresses for each device or interface in a stack. Each stack can define up to eight VMACs per protocol (IPv4 or IPv6) for each OSA interface. VMAC support helps to simplify the infrastructure and provide load balancing when a logical partition is sharing the same OSA MAC address with another logical partition. Each operating system instance can now have its own unique address. All IP addresses associated with a TCP/IP stack are accessible using their own VMAC addresses, instead of sharing the MAC address of an OSA port.
5. z/VSE has a strong focus on network security.
The OpenSSL-based SSL runtime component can be used to enhance the security of your business. This no-cost library is quick and easy to use in a C programming environment and provides key management utilities.
For information that will help you install, tailor, and configure new networking options for z/VSE, including descriptions of TCP/IP for VSE/ESA, IPv6/VSE, and Fast Path to Linux on System z (LFP), see the IBM Redbooks publ
Mike Ebbers is an IBM Redbooks Project Leader. He works with technical experts to create books, guides, blogs, and videos. Follow Mike on Twitter at @MikeEbbers.