The systems that make up the TSAF collection can be connected by
any of the following links:
TSAF-controlled links:
Channel-to-channel (CTC) links, including 3088 links
Binary Synchronous Communications (BSC) links
IEEE 802.3 Local Area Network (Ethernet or IEEE 802.3) subsystem
on the IBM® rack-mounted processors
IBM Token Ring Local Area
Network subsystem on the IBM rack-mounted
processors.
VTAM-controlled links:
Links controlled by VTAM® occur
when logical APPC links and SNA sessions are established between the
TSAF virtual machines.
In Figure 1, assume each system has TSAF
running. This is an example of a TSAF collection made up of eight z/VM® systems. VMSYS3,
VMSYS4, VMSYS5, and VMSYS6 are a local area network of rack-mounted
systems. The systems
are connected by the various types of links. Links labeled A can be
CTC links (including 3088), BSC, or APPC links. Links labeled B are
Local Area Network (LAN) links. Each LAN link has a Continuously Executing
Transfer Interface (CETI) group. Figure 1. Sample TSAF Collection with Various
Links
You should not define multiple active links between two TSAF virtual
machines. If multiple active links are defined, the TSAF virtual machines
may not choose the same link to communicate and unpredictable results
may occur.
