TCP/IP Tutorial and Technical Overview - IBM Redbooks

Network virtualization
Network virtualization enables administrators to manage portions of a network
that might be shared among different enterprises as virtual networks, while still
continuing to preserve the isolation of traffic and resource utilization. Network
virtualization also enables the administrator to prioritize traffic across the network
to ensure the optimum performance for vital business applications and
processes. This includes technologies such as virtual private networks (VPNs),
HiperSockets, virtual networks, and virtual LANs.
24.6 Virtual Router Redundancy Protocol (VRRP)
24.6.1 Introduction
Virtual Router Redundancy Protocol (VRRP) was issued to the IETF by IBM,
Ascend Communications, Microsoft, and Digital Equipment Corporation in April
1998 and is documented in RFC 3768. Its status is a proposed standard.
The use of a statically configured default route is quite popular for host IP
configurations. It minimizes configuration and processing inefficiencies on the
end host and is supported by virtually every IP implementation. This mode of
operation is likely where dynamic host configuration protocols (such as 3.7,
“Dynamic Host Configuration Protocol (DHCP)” on page 130) are deployed,
which typically provide configuration for an end host IP address and default
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