TCP/IP Connectivity Utilities (5722-TC1)
564 iSeries Handbook
TCP/IP Dial-on-Demand (DOD) Networking
Connections are made only when there is a need to communicate. Dial-on-Demand is
supported on all switched network types and is particularly well-suited to ISDN with its fast
call setup time. It is also valuable for burst and infrequent traffic patterns – especially if you
have more remote locations than physical lines. With Dial-on-Demand, modem and telephone
line resources are not committed until an application attempts to communicate with a remote
site. Therefore, a small number of physical resources can dynamically serve a large number
of remote networks.
TCP/IP Integrated Load Balancing: Virtual IP Addressing (VIPA)
Virtual IP Addressing creates a virtual TCP/IP address that is not associated with a physical
network interface on the iSeries. This virtual address on the iSeries server can be reached
from the network through all installed physical interfaces. This allows the use of a single IP
address with load balancing over multiple physical interfaces and can dramatically increase
network performance for high-volume iSeries e-business servers.
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