Our test environment used a Cisco Catalyst 6509 switch that has VLAN and
routing support.
The servers External Load balancer A and External FW (firewall) are devices
external to z/VM. They could be either commercially available, off-the-shelf
devices dedicated to this function or they could be general purpose servers
programmed to perform this function. In our case, they were identical desktop
Personal Computers loaded with SUSE Linux SLES 9 and programmed to
perform different roles. Their configuration is described later.
4.10.4 z/VM system configuration ...
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