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Components FAQ

SNMP Manager Toolkit

What is SNMP?
What can I do with this toolkit?
What are the key differences between different versions
Is SNMP v3 supported?
Are SNMP v1 and v2c supported?
Do I need any additional libraries or components?
Do you support synchronous and asynchronous styles?
Can I use this to develop SNMP agent software?
Can I use this in applets?
How big is the footprint?
Why don't you support Java Beans™?
What about charting capabilities?

SNMP Utilities

What is a MIB compiler/loader?
What is the SNMP Discovery Component?
What does the sample MIB browser do?
Can I redistribute the MIB compiler/loader with my application?
Can I redistribute the MIB browser with my application?
Can I 'pre-compile' MIBs? Why would I want to do that?

HTTP Server Toolkit

What can I do with this toolkit?
What versions of HTTP are supported?
Do you support servlets?
Do I need to learn CGI or any other scripting?
What about SSL and HTTPS?

SMTP Client Utility

What is SMTP?
What can I do with this utility?
What mail formats are supported?
What other software or services do I need?
Can I send attachments with my email messages?
Can this utility be used to receive email?

TFTP Client Utility

What is TFTP?
What can I do with this utility?


SNMP Manager Toolkit

What is SNMP?

Simple Network Management Protocol is the most ubiquitous protocol used in the management of network devices, services, and applications. It is a connectionless protocol that rides on top of UDP (User Datagram Protocol) and is described in the Internet RFC 1157. There are generally two varieties of SNMP entities - agents and managers (although newer classifications can now be found). Agents represent the entities to be managed, while managers manage agents. For more details, please refer to the SNMP FAQ.

What can I do with this toolkit?

With the SNMP Manager Toolkit, you can develop network management applications. Typically, such applications monitor SNMP-enabled devices such as routers, copiers, printers, and servers. You can also receive and generate SNMP traps. You can use synchronous or asynchronous styles of communication.

What are the key differences between different versions

The Programmer's Guide contains these and other related details.

Is SNMP v3 supported?

Yes. The SHA, and MD5 schemes for authentication and the CBC-DES scheme for encryption are supported. The USM model from a manager perspective is completely supported along with the support API calls to remotely change security and authentication passwords.

Are SNMP v1 and v2c supported?

Yes. They are supported as well. And there is an extremely simple migration path from SNMP v1 and SNMP v2c to SNMP v3 applications. Multiple versions can even be used within the same application.

Do I need any additional libraries or components?

No. Some users assume that they need a third-party library for cryptography, or perhaps the Java JCA™ API. But all software needed for the product is built in. We acknowledge the use of software from Cryptix for the CBC DES encryption in the SNMP Manager Toolkit v2.0 and above, albeit with significant modifications. No assumption is made about the presence (or absence) of required class libraries.

Do you support synchronous and asynchronous styles?

Yes. An application can use either, or can mix and match based on its needs. Asynchronous communications often yield better performance, but synchronous communications are simpler to implement.

Can I use this to develop SNMP agent software?

No. The API supports the development of SNMP manager applications only.

Can I use this in applets?

Yes, with the normal caveats of security issues in a browser. Popular browsers do not allow UDP. You will probably need to sign your applet, or run it with compromised security. If neither of these is acceptable, you may want to consider using the HTTP Server Toolkit and build a classic 3-tier application where the data collection is done on the HTTP server host and transported using HTTP.

How big is the footprint?

Small! The SNMP Manager Toolkit .jar file is approximately 80 KB. The small size makes it greatly suited for embedded applications such as routers, handheld devices, and any other environment where resources are at a premium.

We encourage you to compare this footprint with other Java SNMP implementations.

Why don't you support Java Beans™?

Cyberons™ for Java™ is a focused toolkit for power developers. We designed the API to be minimal, yet complete. Beans are excellent building blocks, but they need to be tailored to your application. We did not want to appear presumptuous about your application by simply providing 'datasheet check-box' features.

Our customers have not expressed a need for Java Beans, and prefer to create their own using the toolkits. Typically, our users demand simple APIs with minimal, essential classes - along with examples and javadoc - but little else.

However, if there are Java Beans that you feel would be useful additions to the product, please let us know. With sufficient customer demand, we will incorporate them into future versions of the product.

What about charting capabilities?

None are supported. The product is focused on the network management aspects of SNMP; visualization can be built using third-party libraries.

SNMP Utilities

What is a MIB compiler/loader?

SNMP developers refer to the structure of management information in terms of a MIB (Management Information Base). A MIB is a somewhat textual (ASN.1) representation. A MIB compiler/loader translates the information contained in the MIB into a programmatically accessible form. Thus, using a MIB compiler, you can 'load' the MIB from RFC 1213 and refer to the sysDescr variable in the System group as "sysDescr" instead of by its OID (Object Identifier), which is 1.3.6.1.2.1.1.1.0. Also, other semantic details, such as the textual description, the type of the object, the range, and the accessibility, can be programmatically determined from a compiled MIB.

What is the SNMP Discovery Component?

This is a new class library introduced in Version 3.1 of Cyberons for Java. It provides the developer means of discovering SNMP devices in a network. The discovery component supports a wide variety of discovery options, including broadcast, recursive searching through SNMP routers, etc. These options are configurable, and provide the developer a much requested feature.

What does the sample MIB browser do?

It provides an application that illustrates traversing through a MIB against a device. It serves as an example of the API usage of the MIB compiler and the SNMP Manager Toolkit.

While not expressly created for the purpose, it also serves as a great test tool during application development.

Can I redistribute the MIB compiler/loader with my application?

Absolutely! However, you must follow the terms outlined in the license agreement.

Can I redistribute the MIB browser with my application?

No. Under the terms of the license agreement, you may not redistribute any samples or source code provided with the product.

Can I 'pre-compile' MIBs? Why would I want to do that?

Yes. 'Pre-compiling' is essentially the process of loading and compiling a MIB, and then saving the compiled form. Subsequently, the pre-compiled MIB can be reloaded, often in a fraction of the time it would take to load and compile it. This is a recommended practice if your application loads the MIB repeatedly.

A common use of pre-compiling MIBs is in a monitoring application for a group of devices whose MIB was used during development and needs to be packaged with the final product.

HTTP Server Toolkit

What can I do with this toolkit?

You can develop HTTP server applications. Typical applications include web sites and web based management of devices. The HTTP Server Toolkit is extremely small and ideally suited for embedding in devices.

As part of the NMS Application Toolkit, the HTTP Server Toolkit is an ideal complement to developing three-tiered management applications wherein the SNMP Manager Toolkit is used for monitoring and data collection and the HTTP Server Toolkit is used to transport and present the data to HTTP client browsers in suitably customized form.

Out of the box, the HTTP Server Toolkit provides you with a standard HTTP server that can serve HTML pages!

Netaphor developed its MetaConsole product using these components.

What versions of HTTP are supported?

HTTP/1.0 and HTTP/1.1 are supported.

Do you support servlets?

No. The HTTP Server Toolkit is a lightweight set of classes intended for tiny applications. It is not intended as a replacement for commercial HTTP servers that endure millions of hits a day. It is intended as a key component of network management and does not support large infrastructures.

Do I need to learn CGI or any other scripting?

No. All the customization can be done in Java.

What about SSL and HTTPS?

SSL (Secure Sockets Layer) and HTTPS (Secure HTTP) are not supported at this time. They are planned for a future release.

SMTP Client Utility

What is SMTP?

Simple Mail Transfer Protocol is a TCP (Transmission Control Protocol) based protocol used for transferring email between hosts. It is defined in the Internet RFC 822.

What can I do with this utility?

You can programmatically generate email messages and send them to recipients, formatted as plain text or as HTML. Email attachments are supported.

A simple but powerful use of this utility in a network management application is to notify administrators of alarms and error conditions detected by the monitoring portion of your application. In conjunction with the SNMP Manager Toolkit, you can build powerful applications wherein sensitive data are monitored, and exceptions and alarms programmatically transmitted to a systems administrator. Also, mail messages can be dispatched to most paging devices and mobile phones, trivially!

What mail formats are supported?

Out of the box, the text/plain and text/html formats are supported using MIME 1.0 encoding. Base64 encoding is supported for attachments.

What other software or services do I need?

While no other software is needed for developing applications, an SMTP relay server is necessitated per the protocol itself to 'send' mail messages.

Can I send attachments with my email messages?

Yes. The encoding employed is Base64.

Can this utility be used to receive email?

No. This is a client-side utility used only to send electronic mail.

TFTP Client Utility

What is TFTP?

Trivial File Transfer Protocol is a very simple protocol used to transfer files. It is described in the Internet RFC 1350. It is primarily used for transferring files using a lightweight protocol layered on UDP (User Datagram Protocol).

What can I do with this utility?

File transfer using TFTP can be used to configure routers and switches. This utility lets you read and write the configuration files. The protocol can also be used to transfer files into and out of embedded devices where space is at a premium and prevents the use of a more sophisticated protocol like File Transfer Protocol (FTP). It can also be used to load the boot image of an embedded device from a remote TFTP server.

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