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"Increase network throughput & fault tolerance in Solaris 8 (HW
01/01) and beyond," by Ken Robson 

In the January hardware release of Solaris 8 Sun added a new feature
to Solaris called IP Network Multipathing. This feature allows for
the automatic fail-over of NICs and spreads outgoing connections over
various NICs. To configure this extension it is necessary to add some
additional parameters in /etc/hostname [interface identifier]. Once
configured the in.mpathd pools the private addresses assigned to
these cards to ascertain their availability and will migrate
connections to other NICs in the physical interface group until the
NIC becomes available again or is replaced. This technology cannot be
used on interfaces that are being managed with alternate pathing but
is useful in protecting yourself against the following problems:

1) NIC failure 
2) Cable failure 
3) Switch port failure

As a bonus, the technology also overcomes the age-old problem when
using round robin DNS records where only the first interface
installed in a machine was used for return traffic. This was due to
the fact that when packets where sent out form the machine they would
use the first entry they found in the routing table which would
usually be the first physically installed interface.

For more information on setting up and configuring this feature
please see:
http://docs.sun.com/ab2/coll.709.2/IPNETMPADMIN/@Ab2TocView?Ab2Lang=C&Ab2Enc=iso-8859-1

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LEARNING ZONE FEATURED BOOK OF THE WEEK
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"Designing and Programming CICS Applications," by John Horswill
Each part of "Designing and Programming CICS Applications" addresses
the design requirements for specific components and gives a
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reviews the basic concepts of a business application and the way CICS
meets these requirements. It then covers a wide range of application
development technologies, including VisualAge for Java, WebSphere
Studio, and Visual Basic. Users learn not only how to design and
write their programs but also how to deploy their applications.
http://www.digitalguru.com/dgstore/product.asp?isbn=1565926765&ac_id=68
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