computer science

Solaris IP network multipathing

Solaris IP network multipathing is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Solaris IP network multipathing rather than just read about it. In short: The IP network multipathing or IPMP is a facility provided by Solaris to provide fault-tolerance and load spreading for network interface cards (NICs). With IPMP, two or more NICs are dedicated for each network to which the host connects.

Key takeaways

Solaris IP network multipathing belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Solaris IP network multipathing to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Solaris IP network multipathing from memory before moving on to harder problems.

Reference excerpt

The IP network multipathing or IPMP is a facility provided by Solaris to provide fault-tolerance and load spreading for network interface cards (NICs). With IPMP, two or more NICs are dedicated for each network to which the host connects. Each interface can be assigned a static "test" IP address, which is used to assess the operational state of the interface. Each virtual IP address is assigned to an interface, though there may be more interfaces than virtual IP addresses, some of the interfaces being purely for standby purposes. When the failure of an interface is detected its virtual IP addresses are swapped to an operational interface in the group. The IPMP load spreading feature increases the machine's bandwidth by spreading the outbound load between all the cards in the same IPMP group. in.mpathd is the daemon in the Solaris OS responsible for IPMP functionality.

See also Multihoming Multipath routing Multipath TCP Common Address Redundancy Protocol

External links Enterprise Networking Article, February 2, 2006 Introducing IPMP - Oracle Solaris 11 IPMP section from Sun Solaris 10 System Administration Guide

Worked examples

Example 1 — a first encounter with Solaris IP network multipathing

Start with the simplest possible case. Write down what Solaris IP network multipathing claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Solaris IP network multipathing before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Solaris IP network multipathing ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Solaris IP network multipathing

In research: Solaris IP network multipathing appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Solaris IP network multipathing in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Solaris IP network multipathing is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer network stubs, Networking standards, Sun Microsystems software, so understanding it makes those chapters shorter.
In everyday life: Look for Solaris IP network multipathing outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Solaris IP network multipathing in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Solaris IP network multipathing means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Solaris IP network multipathing out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Solaris IP network multipathing in simple terms?

Why does Solaris IP network multipathing matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Solaris IP network multipathing?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Solaris IP network multipathing.